Appellant, James Perry, was convicted by a jury in the Circuit Court for Montgomery County of three counts of premeditated murder and one count of conspiracy to commit murder. For the three murders, Perry was sentenced to death. A separate sentence of life imprisonment was imposed for the conspiracy.
The convictions arose from the murders of Mildred Horn, her eight-year-old disabled son, Trevor Horn, and Trevor’s nurse, Janice Saunders. The murders occurred in Mildred Horn’s home in Rockville, in the early morning hours of March 3, 1993. Ms. Horn and Ms. Saunders were shot in the head; Trevor died of asphyxia — his air supply had been cut off by suffocation. The State’s evidence, the sufficiency of which has never been challenged by Perry, was that Perry was a hired killer, that he committed the murders as part of a conspiracy with Lawrence Horn, Mildred’s former husband and Trevor’s father, and that Lawrence Horn’s motive in arranging for the murders was to collect approximately $1 million from a trust that had been established for Trevor from the proceeds of a personal injury claim. Lawrence Horn was tried separately and convicted for his role in the matter.
In his direct appeal from the three convictions and sentence of death, Perry raised a number of issues, all but one of which we rejected on the merits. Perry v. State, 344 Md. 204, 686 A.2d 274, cert. denied, 520 U.S. 1146, 117 S.Ct. 1318, 137 L.Ed.2d 480 (1997). The one issue that we did not address but left for further development in a post-conviction proceeding concerned the admission into evidence of a 22-second taped telephone conversation between Perry and Horn and testimony identifying the voices on that tape. Upon denial of relief by the Supreme Court, Perry filed a petition for post-conviction relief in the Circuit Court for Montgomery County. He raised several issues but focused principally on questions arising from the admission of the tape-recorded conversation: whether admission of the recording and testimony concerning it was error; whether, if error, the error was harmless under *41the test enunciated in Dorsey v. State, 276 Md. 638, 350 A.2d 665 (1976); and whether, if Perry’s complaint about the admission of that evidence is held to have been waived because of the lack of a timely objection, counsel’s failure to make such an objection amounts to a Constitutionally ineffective assistance of counsel under the two-prong test established in Strickland v. Washington, 466 U.S. 668, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984). The post-conviction court denied relief, and we granted Perry’s application for leave to appeal. Although Perry presses several complaints in his petition, we need address only those relating to the 22-second tape recording.1
BACKGROUND
A. The Trial
The evidence that Perry murdered Mildred Horn, Trevor Horn, and Janice Saunders, though substantial and more than legally sufficient, was almost entirely circumstantial. We recited that evidence in some detail in the opinion disposing of Perry’s direct appeal, and there is no need to recount it all here. As Perry had no apparent connection with the victims and as it seemed clear from the circumstances that robbery was not a motive for the break-in at Ms. Horn’s home, a key *42element of the State’s case was tying Perry to Lawrence Horn, who did have a substantial motive to have Mildred and Trevor killed and also to have any witness to those murders killed. Horn lived in Los Angeles; Perry lived in Detroit; and Mildred and Trevor lived in Rockville.
The only direct testimonial evidence of contact between Horn and Perry came from Thomas Turner, a resident of Detroit, who was Horn’s cousin and Perry’s friend and who testified under a grant of immunity.2 In the spring of 1992, Horn, while visiting Detroit, had complained to Turner of problems he was having regarding visitation with his children, and Turner (1) suggested that Perry might be able to help him, and (2) assisted Horn in contacting Perry. After the murders, Turner continued to act as an intermediary to facilitate communication between Horn and Perry. Apart from Turner’s testimony and the tape recording at issue here, the State’s evidence relating to contact between Horn and Perry was entirely circumstantial and consisted of telephone records documenting approximately 160 calls during 1992 and 1993(1) from public telephones in Detroit, located near Perry’s home or in places Perry was known to visit, to Horn’s home in Los Angeles, (2) from public telephones in Los Angeles to Perry’s home in Detroit or to places in Detroit Perry was known to visit, (3) from public telephones in the Rockville area to Horn’s home and from Los Angeles to hotels in Maryland at times when Perry was in Maryland, and (4) from public telephones in the Maryland-District of Columbia suburban area to Perry’s home at times when Horn was in Maryland.
The State contended that these calls were, in fact, between Horn and Perry. Through evidence of the use of fictitious names, telephone cards in other person’s names, and intermediaries, the State further attempted to show an elaborate scheme by Horn and Perry to camouflage the contact between them. All of the calls originated from pay phones; no evidence was uncovered of any calls between Horn’s home and *43Perry’s home. Similar camouflaging techniques were used to disguise the transfer of $6,000 from Horn to Perry, which presumably served as compensation for Perry’s services. The money was transferred through Western Union in the name of a fictitious person in Los Angeles to Perry’s girlfriend in Detroit.
On March 12, 1993 — nine days after the murders — the Los Angeles police executed a search warrant at Horn’s apartment. Montgomery County Detective Wittenberger, who accompanied the Los Angeles police, described the residence as a small one-bedroom apartment, with a living room, kitchen area, and bathroom. In the living room, the police found three computers, computer disks, hard drives, back-up drives, telephone and bank records, videotapes, 56 cassette tapes, 12 micro-cassette tapes, and a telephone answering machine. After listening to and examining this evidence, the police discovered, at the end of one of the micro-cassettes — Tape No. 5 — a 22-second conversation between two men, whose voices were later identified as those of Horn and Perry. That conversation was copied to another cassette, and both tapes were eventually admitted into evidence against Perry. Tape No. 5 was admitted as State’s Exhibit 342; the copy of the 22-second conversation taken from that tape was admitted as State’s Exhibit 312. Those exhibits, and the testimony identifying the voices, are the subject of the dispute now before us.
A transcript of the conversation recorded on the tape was prepared by the State, but it was not admitted into evidence and is not in the trial record. Judge Pincus, the post-conviction hearing judge, listened to the tape and found the conversation to be as follows:
“Horn: Yeah.
Perry: Are you able to talk?
Horn: No.
Perry: OK. All right. So I mean, I’m sittin’ there.
Horn: Can you uh ...
Perry: I could take a picture, I could take a picture of him. You know, right you know right ... there but I couldn’t. *44The noise, you understand what I’m saying? I wasn’t able to do the others, didn’t, I didn’t want to go uh front wise
Although, at trial, Perry contended that the tape was unclear, he does not now contest Judge Pincus’s finding of what it contains. Nor does the State.3
The tape recording was disclosed to defense counsel in discovery, and they recognized that it was an important and damaging piece of evidence, for either of two reasons. It was the only direct physical evidence of contact between Perry and Horn — it documented a conversation between the two. In pre-trial statements to the police, both men had denied ever speaking with the other. The State also had evidence, from the mass of telephone records, that a 22-second telephone call was made at 5:12 a.m. on March 3, 1993 — very shortly after the murders were committed — from a pay phone at a Denny’s restaurant in Gaithersburg, which is not far from Rockville, to Horn’s home, and, although there was no clear evidence that Exhibits 312 and 342 captured'that particular conversation, the State was likely .to argue that they, in fact, did so. If the jury accepted that contention, it would have evidence not only of contact between the two men, but of contact that was contemporaneous with the murders and, depending on how the jury interpreted the conversation, could relate to the murders.
Immediately upon the entry of counsel’s appearance on September 9, 1994 — before the State disclosed the tape in discovery — Perry filed an omnibus motion to suppress evidence, including “[a]ll wire intercepts, eavesdropping, electronic surveillance and telecommunication records” on the ground that “[wjire intercepts, eavesdropping, electronic surveillance and telecommunication records were obtained in violation of the Defendant’s rights secured to Defendant by *45the United States Constitution, the Maryland Constitution and federal and state substantive and procedural law.” That motion remained pending when counsel learned of the tape in discovery. Notwithstanding their appreciation of the significance of the conversation on Tape No. 5, however, which they knew had been recorded by Horn, counsel did not mention that tape when arguing their motion to suppress and made no argument that the recording of the conversation by Horn constituted a violation of the Maryland Wiretapping and Electronic Surveillance law, Maryland Code, §§ 10-401 -10-414 of the Courts and Judicial Proceedings Article (CJ). Though facially broad enough to include the recording by Horn, the motion to suppress, as argued, was limited to four other wiretaps made by the F.B.I. pursuant to orders entered by Federal courts in Los Angeles and Michigan. As so limited, the pre-trial motion was denied.
In his opening statement, the prosecutor informed the jury that it would hear a tape recording of Perry talking with Horn. The first evidentiary reference to the particular tape came during the testimony of Horn’s daughter, Tiffany, on the fifth day of trial. Tiffany confirmed that Horn had an answering machine in his apartment, that there were cassettes that went with the machine, and that he taped calls. The prosecutor showed her Exhibit 312, which was marked for identification, and asked if she had listened to that tape prior to trial. She responded affirmatively and stated that, although she recognized one of the voices as that of her father, she could not identify the other voice. No objection was made with respect to that part of Tiffany’s testimony. Neither Exhibit 312 nor Exhibit 342 were offered into evidence at that time.
Exhibits 312 and 342 came into evidence the next day during the testimony of Detective Wittenberger. The detective identified Exhibit 342 as one of the micro-cassettes seized pursuant to the search warrant and Exhibit 312 as containing a copy of the conversation recorded at the end of Exhibit 342. Perry objected on the grounds of materiality and relevance. He indicated, and the court acknowledged, that he had objected to those tapes earlier, although we are unable to locate any *46reference to such an objection, but explained that his objection was based on the lack of testimony “as to the total qualities, the analysis of those items, as to their ability to portray accurately whatever may be recorded on them.” In our earlier opinion, we treated that objection as being on the ground that “the quality of the sound reproduction was so poor that the tapes could not accurately present that which they purported to record.” Perry, supra, 344 at 223, 686 A.2d at 283. The court overruled the objection without prejudice to Perry’s renewing it if and when the State sought to play the tape for the jury.
That occurred on the tenth day of trial, during the testimony of Cynthia Turner, Thomas Turner’s wife. When the prosecutor said that he intended to play Exhibit 312 and ask if Ms. Turner could recognize any of the voices, Perry renewed his objection on -the grounds that (1) there had been no foundation laid as to the familiarity of the witness with any of the voices on the tape, and (2) the quality of the tape was such as to render any attempt to identify the voices unreliable. In support of the latter point, Perry noted that experts who had conducted a speetrographic analysis had been unable to make a voice identification. The court pointed out that the tapes were already in evidence, but it took a brief recess, listened to Exhibit 312 in chambers, and concluded that it was clear enough that someone familiar with the voices could possibly identify them. On that basis, the objection was overruled. The witness stated that she was familiar with Perry’s voice. The tape was then played in court, following which Ms. Turner said that she recognized Perry’s voice.
On the morning of the eleventh day of trial, counsel informed the court that, on his way home the previous evening, he realized for the first time — “the neurons connected” — that Exhibit 342 was made in violation of the Maryland wiretap law, and he renewed his objection to that exhibit and Exhibit 312 on that ground. He argued that the recording made by Horn constituted the interception of a wire communication, that it was without Perry’s consent, and that, under Maryland law, with exceptions not relevant here, the interception of a *47wire communication without the consent of all parties to the conversation is unlawful. He urged that CJ § 10-405 made any evidence derived from an unlawful interception inadmissible, whether or not the call originated in Maryland. Acknowledging that two witnesses had already identified the voices on the tape, counsel urged, at a minimum, that no further attempt be made to identify the voices. He indicated that, as alternative remedies, the jury be instructed to disregard the identifying testimony of Tiffany Horn and Cynthia Turner, that the court declare a mistrial, and, if the tapes had been presented to the grand jury, that the indictment be dismissed.
The State responded that, because Horn and Perry were co-conspirators, the wiretap law did not render the tape inadmissible — that even if Horn’s act of recording the conversation was illegal, “Mr. Perry acting in concert with Mr. Horn is in essence a co-conspirator bound by his acts,” and that it was not the legislative intent for the statute to cover that situation. The prosecutor asserted, without challenge, that the tape had not been played to the grand jury. The court deferred ruling on the motion until the conclusion of Thomas Turner’s testimony, to give the State an additional opportunity to consider the matter. At that time, the court regarded the belated motion as presenting three issues: (1) whether the tape was admissible under the wiretap law; (2) who had the burden of establishing whether the taping was with mutual consent; and (3) whether the objection was waived. Ultimately, after listening to further argument, the court found that the objection was waived. The finding of waiver had a dual basis: counsel’s failure to move to suppress the tape before trial, as required by Maryland Rule 4-252; and counsel’s failure to object when the tape was offered into evidence the previous day. At no point in presenting and arguing his motion did Perry call the court’s attention to CJ § 10-408®, permitting a motion to suppress an unlawfully intercepted communication to be made during trial, and the court made no mention of that provision.
Following the court’s ruling, the tape was played in court three more times. It was played first for Thomas Turner, *48who identified the voices as being those of Horn and Perry. Detective Wittenberger was recalled, and he, too, confirmed that he had listened to the tape and identified the voices as those of Horn and Perry. During the State’s closing argument, the tape was played twice. In his principal closing argument, the prosecutor indicated that he did not know when the conversation took place, other than that it occurred between the middle of 1992 and March 12, 1993, and he invited the jury to listen and determine for itself what the parties were saying. In his rebuttal argument, he asked the jury to consider whether the tape was of the conversation that occurred at 5:12 a.m. on March 3 and whether the noise referred to by Perry was the noise emanating from Trevor’s breathing monitor. The tape was played again for the jury. The prosecutor stressed that Perry had told the F.B.I., upon his arrest, that he did not know Lawrence Horn and that Horn had denied ever speaking with Perry.
B. The Appeal
On appeal, Perry pursued his claim that the tape was made in violation of the Maryland wiretap law and was inadmissible for that reason. He also took issue with the court’s ruling that his objection had been waived. Although acknowledging that Maryland Rule 4-252 requires a motion raising the issue of an unlawful interception of a wire or oral communication to be made within five days after the interception is disclosed in discovery and that, ordinarily, the matter is waived if not so raised, Perry urged that the court retains discretion to consider a suppression motion at trial, and that a waiver under the rule is not absolute. In the plainly mistaken belief that the tapes had not yet been admitted into evidence when his wiretap objection was made, he also took exception to the court’s finding of waiver based on his failure to object when the tape was played for Cynthia Turner and she identified his voice. He argued that the court could have ruled the tapes inadmissible, precluded further mention of them, and instructed the jury to disregard Cynthia Turner’s testimony regarding *49the voices on the tape.4 His point, as we perceived it, was that the trial court abused its discretion by failing to find good cause to excuse the waiver. Alternatively, he contended that, if we were to determine that the objection was not properly preserved, we should find that trial counsel’s performance was Constitutionally inadequate under Strickland v. Washington, supra, 466 U.S. 668, 104 S.Ct. 2052, 80 L.Ed.2d 674.
Perry never argued to us the effect of § 10-408(i). As we indicated, “[b]efore this Court, as well as before the circuit court, the arguments for finding waiver, and for relieving from waiver, have revolved around Md. Rule 4-252(a).” Perry v. State, supra, 344 Md. at 228, 686 A.2d at 285. With respect to that issue, we noted that, had a pre-trial motion to suppress the Horn tape been made, the State would have had 15 days to respond to it. The State had no reason or occasion to focus on the complex factual and legal issues that might be generated by such a motion — issues that might require additional evidence. Because, as to suppression issues, the parties are ordinarily bound by the record made at a suppression hearing, we concluded that, in the interest of fairness, “the parties should be given substantially the same opportunity to develop a factual record, and legal arguments based thereon, in presenting and responding to Perry’s belated suppression motion that they would have enjoyed in presenting and responding to a pretrial suppression motion.” Id. at 226, 686 A.2d at 285. For that reason, we held that the trial court did not abuse its discretion in refusing to interrupt the trial to conduct a belated suppression hearing for which neither party had an adequate opportunity to prepare. For like reasons, we reject*50ed Perry’s invitation to decide his claim of ineffective assistance of counsel in the direct appeal. The net result of those conclusions was our holding that Perry’s claim that State’s Exhibit 312 (and State’s Exhibit 342) were improperly admitted was “not before us on direct appeal,” but that our ruling and our affirmance of the judgment of conviction was “without prejudice to Perry’s raising on post conviction review his contention that Exhibits] 312 [and 342] should have been excluded under the Maryland wiretap statute.” Id. at 228, 686 A.2d at 285.
Although Perry never noted the existence, and therefore never argued the effect, of § 10 — 408(i), we pointed out that, under that statute, a motion to suppress a communication intercepted in violation of the wiretap law “may be made before or during the trial.” Id. at 229, 686 A.2d at 286 (emphasis added). We concluded that “[i]t was unnecessary for Perry to have referred the trial court specifically to CJ § 10 — 408(i) in order to preserve his argument that the trial court should have considered his mid-trial motion to suppress.” Id. We assumed, arguendo, that § 10-408(i) conferred a procedural right to seek suppression during the trial, but, for the reasons already noted in our discussion of Rule 4-252, we were unable to determine from the existing record whether a hearing on a mid-trial motion “would have resulted in the suppression” of Exhibits 312 and 342. Id. Accordingly, we decided that we would not address the effect of § 10-408(i) in the direct appeal but made clear that that ruling “likewise, is without prejudice to Perry’s relying on CJ § 10-408(i) in a post conviction proceeding.” Id. With the caveats noted, and finding no other reversible error, we affirmed the judgments.
C. The Post-Conviction Case
In the post-conviction case, Perry presented his complaint about the admission of Exhibits 312 and 342 in two contexts— as trial error and as an example of the ineffective assistance of counsel. His trial error allegation dealt both with the admissibility of the tapes and the trial court’s ruling that his objection to those tapes was waived. The alternative allegation was *51that trial counsel was ineffective in failing (1) to file a pre-trial suppression motion,5 and (2) to object to Exhibit 312 (and presumably Exhibit 342 and the testimony relating to those exhibits as well) in a timely manner.
The court dealt with most of the issues as presented by Perry in his petition although, as we shall explain, it treated the waiver issue narrowly, focusing only on whether the trial court abused its discretion in declining to entertain the mid-trial motion and concluding that that issue had been raised and finally litigated in Perry’s direct appeal. The court noted that it had nonetheless held a suppression hearing to determine the admissibility of the exhibits and, reserving momentarily on the substantive issue, rejected Perry’s contention that, if the exhibits were inadmissible, the court must apply the Dorsey v. State harmless error standard. That standard, it held, was inappropriate in a post-conviction proceeding. Rather, the court said that it had held a suppression hearing “to determine whether an error was committed by trial counsel sufficient to support a claim of ineffective assistance of counsel under the guidelines of Strickland and Oken [v. State, 343 Md. 256, 681 A.2d 30, cert. denied, 519 U.S. 1079, 117 S.Ct. 742, 136 L.Ed.2d 681 (1997) ].” The court thus treated the merits of Perry’s claim regarding the admission of the two exhibits solely in the context of his assertion that counsel was ineffective in failing to file a pre-trial suppression motion and to make a timely objection at trial.
On that issue, the court made three basic findings. First, relying principally on United States v. Underhill, 813 F.2d 105 *52(6th Cir.1987),6 it concluded that Perry and Horn were co-conspirators and that, “as a member of the conspiracy with Horn, Perry is bound by the acts of his co-conspirator and may be held to have waived his right of privacy in communications made in furtherance of the purposes of the conspiracy.” The “general purpose and legislative intent” of the Maryland wiretap law, it said, “would be violated if Perry were able to suppress the tapes.” Second, the court found by implication from the fact that “[t]he relationship between Lawrence Horn and James Perry was covered in layers of secrecy and deception,” that the recording was made inadvertently and therefore not willfully.7 It concluded, from the “extraordinary lengths” they went to hide their relationship, that “[t]o suggest that Horn would ‘willfully’ record a conversation between himself and Perry defies logical explanation.” Thus, it found, for that reason as well, that the wiretap law “would not apply.” Upon those findings, the court denied the motion to suppress, determining that “Exhibit 312, even if objected to in a timely fashion, would have been admissible during the trial in this case.”
The court then turned, alternatively, to whether, if it had found Exhibit 312 to be inadmissible, trial counsel’s failure to object timely to its admission could be regarded as unreasonable. Though acknowledging that counsel’s failure to file a timely suppression motion was not due to strategic considerations but rather to their unawareness of the possible application of the Maryland wiretap law, the court nonetheless declined to determine whether that failure constituted deficient *53performance, for it concluded that, even if it were, the error was not so serious as to deprive Perry of a fair trial. In that regard, the court declared that the evidence presented by the State at trial was “overwhelming,” and that, even without Exhibit 312, Perry would have been convicted. From the content of the recorded message and from the fact that the tape did not appear to record the entire conversation, the court doubted that the exhibit captured the 22-second conversation that occurred on the morning of the murders. The fact that the conversation recorded on the tape lasted 22 seconds was, in the court’s view, merely coincidental. The significance of the exhibit was limited, therefore, to simply proving that Horn and Perry were in contact with each other by telephone. There was “an abundance of other evidence” to that effect, however, much of which the court recounted. Its ultimate conclusion was that “even if the 22-second tape had been suppressed, there is not a reasonable probability or a substantial possibility, that the verdict would have been different.”
THE ISSUES
Regrettably, the issues articulated by Perry are, to some extent, based on incorrect assumptions or are incomplete and, to that extent, cannot be fairly resolved precisely as presented. We have noted, for example, the assumption by all parties and the post-conviction court that no pre-trial motion to suppress the Horn tape was made and the articulation of the issues on that premise. Throughout, the issue of the 22-second tape has often been framed with reference only to State’s Exhibit 312, when it necessarily involves as well Exhibit 342 and the testimony of four witnesses who identified the voices on that tape. Perry has assumed in this appeal that the post-conviction court held that the issue of admissibility of the tape had been finally litigated, which is not the case. The real complaints made by Perry are, however, evident. The issues presented by those complaints, as we see them, are as follows:
(1) Did the post-conviction court err in concluding that the issue of whether the trial court abused its discretion in *54failing to entertain the mid-trial motion to suppress Exhibits 312 and 342 had been finally litigated;
(2) Were Exhibits 312 and 342 and the testimony relating to them admissible:
(a) Did the post-conviction court err in holding that, as a co-conspirator, Perry waived his right to privacy and, for that reason, could not avail himself of the exclusionary rule embodied in the wiretap law;
(b) Did the court err in holding that willfulness on the part of Horn was required in order for the intercepted communication to be suppressible;
(c) Did Perry consent to having the conversation recorded;
(3) If Exhibits 312 and 342 and the testimony relating to them were inadmissible under the wiretap law, what test of harmlessness or prejudice should be applied and was that test satisfied;
(4) If the exhibits and testimony were inadmissible and not harmless, did Perry nonetheless waive his objection to them by failing to make it timely; and
(5) If the answer to Question (4) is “yes,” was the assistance of counsel Constitutionally ineffective, for purposes of Article 21 of the Maryland Declaration of Rights and the Sixth Amendment to the United States Constitution, under the standards enunciated in Strickland v. Washington and Lockhart v. Fretwell, 506 U.S. 364, 113 S.Ct. 838, 122 L.Ed.2d 180 (1993)?
DISCUSSION
A. What Was Finally Litigated?
Perry contends in his brief that the post-conviction court erred “in concluding that the issue of the 22-second tape had been finally litigated.” In support of that proposition, he calls attention to the statements in our earlier opinion that “Perry’s contention that Exhibit 312 was improperly admitted and should have been suppressed is not before us on direct appeal” *55and that our affirmance of the judgments of conviction was without prejudice to Perry’s raising that issue in a post-conviction proceeding. Perry, supra, 344 Md. at 228, 686 A.2d at 285.
If, indeed, the post-conviction court had held that the issue of admissibility of the exhibits and testimony had been finally litigated, Perry would be correct in his assessment of that ruling, but that is not what the post-conviction court held. Unfortunately, the post-conviction court looked at the complaint made by Perry in too narrow a fashion. In his petition for post-conviction relief, Perry noted the mid-trial motion to suppress and its denial by the court and complained that “[t]he trial judge incorrectly ruled that because the tape had not been the subject of a pretrial suppression motion, that all rights to suppress it were waived by the Petitioner. That ruling was incorrect and highly prejudicial to the Petitioner.”
Although that assertion embraced the whole issue of waiver, the post-conviction court seemed to interpret it as merely an attack on whether the trial court abused its discretion in failing to interrupt the trial to entertain the belated motion to suppress. The relevant statement, appearing on page 15 of the post-conviction court’s Statement of Reasons was:
“Petitioner argues that the trial judge’s refusal to entertain the suppression of the tape was highly prejudicial to the Petitioner and an abuse of discretion by the court. The issue was raised in the direct appeal and was decided against petitioner’s position.”
(Emphasis added).
In the direct appeal, we noted the practical problems that would have been encountered had the trial court suspended the trial to hold a suppression hearing, and we held, unequivocally, that “[fjor this reason, the trial court acted well within its discretion in refusing to interrupt the trial in order to conduct a belated suppression hearing for which neither party had the opportunity adequately to prepare.” Perry, supra, 344 Md. at 226, 686 A.2d at 285. The precise ruling by the post-conviction court as to what was finally litigated, though *56not fully responsive to Perry’s claim, was correct. More important, because that court did what we directed it to do— hold a suppression hearing itself and rule on admissibility— the fact that the ruling relating to the trial court’s action did not fully address Perry’s complaint was of no prejudice to him. By holding that suppression hearing and ruling on the merits of Perry’s claim that the evidence should have been suppressed, the post-conviction court clearly did not treat the suppression issue as having been finally litigated.
B. Admissibility
(1) Co-Conspiracy Defense
At the post-conviction hearing, the State argued, according to the court, “that the recording is admissible under Maryland law because Horn and Perry were co-conspirators” — that “the recording would be admissible against Horn because he made it” and would likewise “be admissible against Perry because Perry was his co-conspirator and the recording was an act done in furtherance of the conspiracy.” The court announced that it “agrees with this argument.” Citing United States v. Underhill, supra, 813 F.2d 105, the court concluded that “as a member of the conspiracy with Horn, Perry is bound by the acts of his co-conspirator and may be held to have waived his right of privacy in communications made in furtherance of the purposes of the conspiracy.”
Apparently treating this as an application of the co-conspirator exception to the hearsay rule (see Md. Rule 5 — 803(a)(1)), Perry responds that the co-conspirator exception applies only to communications “in furtherance of the conspiracy” and asserts that the conversation captured on the tape does not fall into that category. He urges (1) that if the message recorded on the tape is not the conversation that occurred at 5:12 on the morning the murders was committed, it establishes no more than that the parties had contact and is therefore not a communication in furtherance of the conspiracy, and (2) that if the recording was of the conversation that morning, it occurred after the murders had been committed, by which *57time the objective of the conspiracy had been accomplished and the conspiracy had ended. The State takes issue with both assertions but contends that the court was not applying the hearsay exception in any event. Rather, it treats the court’s ruling as one of statutory construction — that because Perry waived or relinquished his expectation of privacy, the exclusionary rule of the statute does not apply.
We agree that the issue is one of statutory construction and does not involve the hearsay exception articulated in Md. Rule 5-803(a)(l). We disagree, however, that there is any co-conspirator exception embodied or implicit in the Maryland wiretap law.
Underhill arose out of an illegal gambling operation conducted in Tennessee. Two members of the operation, Rokitka and Underhill, routinely taped telephone conversations with other members who were calling in bets, for the purpose of making a record in the event that any dispute later arose about the terms of the betting transaction. The F.B.I. seized the tapes during a search of Rokitka’s apartment, and the issue arose of whether those tapes were admissible at the trial of the conspirators. The question hinged on the scope and application of the Federal wiretap law, 18 U.S.C. § 2510, et seq. Section 2515 provided that no part of the contents of a wire or oral communication that has been intercepted may be received in evidence if the disclosure of that information would be in violation of the Act. That section, the court said, was not self-executing, but depended on § 2518(10)(a)(i), which permitted an “aggrieved person,” defined as a person who was a party to any intercepted wire or oral communication or a person against whom the interception was directed, to move to suppress the contents of an intercepted communication on the ground that the interception was unlawful. The issues were (1) whether the interceptions were unlawful, and (2) if so, whether the defendants were aggrieved persons entitled to suppression.
There were two classes of defendants — Underhill and Rokit-ka, who had made the recordings, and Person, a caller whose *58conversations were taped without his consent. Because the recordings were made by private individuals not acting under color of law, the lawfulness issue was governed by § 2511(2)(d). That section stated that it was not unlawful for such a person to intercept a wire or oral communication when that person is a party to the communication or when one of the parties to the communication had given prior consent to the interception, unless the communication was intercepted for the purpose of committing a criminal, tortious, or other injurious act. Because the making of a gambling record violated a Tennessee statute, the taping of the conversations for the purpose of making such records was, itself, unlawful. The question, then, was whether the defendants had a basis for relief.
Underhill and Rokitka, as noted, had made the recordings, and the court did not believe that it was the intent of Congress “to shield the very people who committed the unlawful interceptions from the consequences of their wrongdoing,” Underhill, 813 F.2d at 112. The purpose of the law, the court declared, was to provide “protection to the victims of unlawful interceptions, not to the perpetrators.” Id. On that premise, the court held that Underhill and Rokitka had “waived their right of privacy in these communications by their deliberate act of causing them to be recorded.” Id. To construe the law otherwise would produce an absurd result that could not have been intended by Congress.
Person, however, argued that he neither made nor consented to the interception and that he was entitled to suppression of the tapes. Citing Pinkerton v. United States, 328 U.S. 640, 646-48, 66 S.Ct. 1180, 1183-84, 90 L.Ed. 1489 (1946) and United States v. Bowers, 739 F.2d 1050, 1052 (6th Cir.1984), cert. denied sub nom. Oakes v. United States, 469 U.S. 861, 105 S.Ct. 195, 83 L.Ed.2d 128 (1984), the court extended the basis it had used for denying relief to Underhill and Rokitka to Person as well and held that “[a]s a member of the conspiracy Person was bound by the acts of his co-conspirators and may be held to have waived his right of privacy in *59communications made in furtherance of the purposes of the conspiracy.” Underhill, 813 F.2d at 112. It stated:
“Each party to a conversation takes the risk that the other party will record and divulge the contents of that conversation. Smith v. Cincinnati Post & Times Star[Times-Slar], 475 F.2d 740 (6th Cir.1973); United States v. Felton, 753 F.2d 256, 259 (3rd Cir.1985). In enacting § 2511(2)(d), Congress sought to protect parties from this risk by making otherwise legal interceptions unlawful if the purpose of the interception was an act enumerated in the statute. In doing so, it did not intend to deprive prosecutors of the most cogent evidence of wrongdoing because the defendants record evidence of their crimes by intercepting communications with their confederates.”
Id.
The rationale applied in Underhill was confirmed by the Sixth Circuit Court of Appeals in Traficant v. C.I.R., 884 F.2d 258 (6th Cir.1989). See also United States v. Bragan, 499 F.2d 1376 (4th Cir.1974); United States v. Murdock, 63 F.3d 1391 (6th Cir.1995) and United States v. Nietupski, 731 F.Supp. 881 (C.D.Ill.1990). Compare, however, In Re Grand Jury, 111 F.3d 1066 (3d Cir.1997).
The State’s and the post-conviction court’s reliance on Underhill is misplaced, not because we necessarily disagree with the Sixth Circuit court’s interpretation of the Federal wiretap law, although the consistency of that interpretation with some of the pronouncements in Gelbard v. United States, 408 U.S. 41, 92 S.Ct. 2357, 33 L.Ed.2d 179 (1972), appears to be a bit strained, but because, at least with respect to its holding concerning the defendant Person, it has no application to, and indeed is incompatible with, the Maryland wiretap law. The critical distinction is highlighted by the Underhill court’s statement that “[e]ach party to a conversation takes the risk that the other party will record and divulge the contents of that conversation.” As the cases cited in Underhill illustrate, that statement emanates from the fact that, under § 2511(2)(d) of the Federal wiretap law, it is not unlawful for one party to a telephone conversation to tape and divulge the *60contents of the conversation, even without the knowledge or consent of the other party to the conversation, unless the taping is for an unlawful purpose. The thrust of the Federal Act is that any conversation may be recorded by a private individual unless the recording is for an unlawful purpose, and under that scheme, parties to telephone conversations really have no assurance that the conversation will not be taped and must assume the risk that it might be recorded.
That is much less the case under the Maryland law. Section 10-402(a) states expressly that, “except as otherwise specifically provided in this subtitle,” it is unlawful for “any person” willfully to intercept any wire communication.8 (Emphasis added). The requirement of a specific exception, which also appears in the Federal Act, assumes a greater significance because of the State-law requirement of all-party consent. The thrust of the State law is that no conversation may be willfully taped unless specifically allowed, and the only provision that would allow a private person, not acting as a government agent, in conformance with a court order, or as an employee of a communication company, to intercept a wire communication is § 10-402(c)(3), which states:
“It is lawful under this subtitle for a person to intercept a wire, oral, or electronic communication where the person is a party to the communication and where all of the parties to the communication have given prior consent to the interception unless the communication is intercepted for the purpose of committing any criminal or tortious act in violation of the Constitution or laws of the United States or of this State.”
(Emphasis added).
As we pointed out in Mustafa v. State, supra, 323 Md. at 74, 591 A.2d at 485, “[t]he two-party consent provision of the *61Maryland Act is aimed at providing greater protection for the privacy interest in communications than the federal law.” The requirement of consent by all parties for the recording of a telephone conversation by a private individual has been a fundamental part of Maryland law since at least 1956, and the one attempt by the Legislature, in 1973, to modify that provision met with a veto in which the Governor expressed his deep concern that the “opportunity for unwarranted spying and intrusions on people’s privacy authorized by this bill is frightening.” See 1973 Md. Laws, Vol. II, at 1925.9 Under long-standing Maryland law, therefore, a party to a telephone conversation does not take the risk that another party, not acting as, or under the direction of, a government agent, will record and divulge the contents of the conversation, for, absent the prior consent of the party, such recording and divulging is clearly prohibited and, indeed, if done willfully, constitutes a criminal offense. Given that prohibition, participants in a telephone conversation may ordinarily rely on the fact that their conversation will not be surreptitiously recorded or, at the very least, that, unless done in strict conformance with the State law, a recording of their conversation will not be admitted into evidence in any Maryland court.
Without commenting on whether one who unlawfully tapes a conversation can seek the protection of the exclusionary rule embodied in the Maryland statute — an issue that is not before us in this case — we find nothing in the Maryland wiretap law, either in its wording or in its legislative history, suggesting an intent by the Legislature to preclude any other party to an *62intercepted conversation from invoking the exclusionary rule on the ground that he/she is a co-conspirator with the person who unlawfully recorded the conversation. Any exception that would make an interception lawful or that would preclude an aggrieved person from moving to suppress an unlawful interception must be “specifically” provided for in the Act, and we find no specific exception for co-conspirators. Thus, although conspirators are generally bound by the acts and statements of their co-conspirators, done or made in furtherance of the conspiracy, there is no basis for concluding that an otherwise aggrieved person — in this instance one whose conversation is taped without his consent — loses his right to suppress the tape merely because the taping is done by a co-conspirator. See State v. Maddox, 69 Md.App. 296, 300-01, 517 A.2d 370, 372 (1986).
It is interesting to note that, 40 years ago, we declined to follow a Supreme Court decision, Rathbun v. United States, 355 U.S. 107, 78 S.Ct. 161, 2 L.Ed.2d 134 (1957), that allowed the admission of unconsented-to eavesdrop evidence under the more liberal Federal wiretap law then in existence. See Robert v. State, 220 Md. 159, 151 A.2d 737 (1958) (holding inadmissible under Maryland law the testimony of police officers who listened on an extension telephone to a conversation between the defendant and his daughter without the defendant’s knowledge or consent). We declared in that case that “[t]he terms of our statute as to obtaining the contents of a telephonic communication and as to the consent of all participants are so different from the language of the Federal Act that we think that the Rathbun case is inapplicable.” Id. at 171, 151 A.2d at 743. That remains the case today. We therefore hold that the post-conviction court erred in finding the exhibits and testimony admissible under some implied co-conspirator exception.
(2) Willfulness
CJ § 10-405 provides that, whenever a wire communication has been intercepted, no part of the contents of the communication and no evidence derived therefrom may be received in *63evidence “if the disclosure of that information would be in violation of this subtitle.” To determine whether the disclosure of an intercepted communication is in violation of the subtitle, it is necessary to look at § 10-402(a)(2) and § 10-407. The former makes it unlawful for any person to “wilfully disclose” to any other person the contents of a wire communication “knowing or having reason to know that the information was obtained through the interception of a wire .. . communication in violation of this subtitle.” Section 10-407(c), however, provides, in relevant part, that any person who has received, “by any means authorized by this subtitle,” any information concerning a wire communication “intercepted in accordance with the provisions of this subtitle,” may disclose the contents of that communication, or the derivative evidence, while giving testimony in court under oath or affirmation.
Under § 10-407(c), Detective Wittenberger was entitled to disclose the tape — to produce, identify, and testify about it— only if he had received the tape by a “means authorized by this subtitle” and the interception was “in accordance with the provisions of this subtitle.” There is no doubt that Wittenber-ger received the tape by an authorized means; he acquired it through execution of a search warrant, the validity of which is not in dispute. The question, then, is whether the interception by Horn was “in accordance with the provisions of the subtitle.”
In this regard, the State looks to § 10-402(a), which makes it unlawful for a person to “wilfully” intercept a wire communication. It maintains, and persuaded the post-conviction court to accept, that a communication that was not intercepted “wilfully” was not intercepted unlawfully, and thus in violation of the subtitle. It urges that unless Horn taped the conversation “wilfully,” there was no impediment to the disclosure of the tape or to the admission of evidence regarding it. As the court found, as a fact, that Horn made the tape “inadvertently,” and therefore not “wilfully,” the State maintains that there was no error in the admission of the challenged evidence.
*64Perry has a different view. He contends that the requirement of willfulness pertains only to civil or criminal actions filed against the interceptor of the communication (or one who uses or discloses the contents of the communication knowing that it was unlawfully intercepted). Willfulness, he urges, is not required for purposes of the exclusionary rule. He cites no authority for that proposition, and we can find no cases either supporting or negating it, but a fair reading of the statute convinces us that Perry’s interpretation is correct.
The statute, unfortunately, is a bit convoluted, requiring consideration of the interplay between several different sections. The confusion that generates the issue results from some sections using the term “lawful” or “unlawful,” while others speak of whether the interception was “in accordance with” the subtitle.
The requirement of willfulness appears only in § 10-402(a), which makes it unlawful for a person to: (1) willfully intercept, endeavor to intercept, or procure another to intercept or endeavor to intercept a wire communication; (2) willfully disclose or endeavor to disclose the contents of a wire communication, knowing or having reason to know that the information was obtained through the interception of a wire communication in violation of the subtitle; or (3) willfully use or endeavor to use the contents of a wire communication knowing or having reason to know that the information was obtained through the interception of a wire communication in violation of the subtitle. Section 10-402(b) makes it a felony to violate subsection (a). Unquestionably, to obtain a conviction for the violation of § 10-402(a), the State would have to prove that the defendant acted willfully.
Section 10-410(a) creates for the benefit of any person whose wire communication was intercepted, disclosed, or used in violation of the subtitle a civil cause of action against the person who intercepted, disclosed, or used the communication. Although § 10-410(a) does not refer directly to § 10-402(a), as does § 10 — 402(b), the reference is implicit from the fact that liability rests solely on the interception, disclosure, or use of *65an intercepted communication — the three acts specified as unlawful in § 10-402(a). The prevailing view, in the Federal courts and in the Court of Special Appeals, is that the same mental state required for a criminal conviction under § 10-402 is also required as a condition to civil liability under § 10-410. See Citron v. Citron, 722 F.2d 14 (2d Cir.1983), cert. denied, 466 U.S. 973, 104 S.Ct. 2350, 80 L.Ed.2d 823 (1984); Malouche v. JH Management Co., 839 F.2d 1024 (4th Cir.1988); Hawes v. Carberry, 103 Md.App. 214, 653 A.2d 479 (1995); Fearnow v. Chesapeake Telephone, 104 Md.App. 1, 655 A.2d 1 (1995). The apparent basis for that approach is that the civil liability under § 10-410 and its Federal counterpart, § 2520, attaches only to violations of § 10-402(a), or its Federal counterpart, § 2511.
Unlike §§ 10-402(b) and 10-410(a), which, directly or by clear inference, tie criminality and civil liability to a violation of § 10-402(a), § 10-407(c) permits testimonial disclosure only if the communication was intercepted “in accordance with the provisions of this subtitle.” The interception by Horn, clearly, would not have been in accordance with the provisions of the subtitle if it was done without Perry’s consent.
This construction of §§ 10-405 and 10-407 raises the prospect of a non-willful interception, without the consent of all parties, being neither lawful under § 10-402(c) nor unlawful under § 10-402(a), which would appear to be an anomaly. When analyzed from the point of view of public policy, however, it is not an anomaly. The Legislature has made unmistakably clear that, except as otherwise specifically provided in the subtitle, wire communications are not to be intercepted without the consent of all parties. As noted, that has been part of our law for more than 40 years and represents a fundamental substantive statement of public policy.
The exclusionary provision in § 10-405 and the criminal and civil liability provided for in §§ 10-402(b) and 10-410(a) are alternative sanctions designed to protect and enforce the substantive provision. Except for those relatively few and ordinarily minor offenses that are regarded as malum prohi-*66bitum, some form of mens rea is almost always required for criminal and civil liability, even if, for civil liability, the degree of required mens rea may be only simple negligence; conditioning such liability on a finding of willfulness is therefore entirely consistent with our general jurisprudential construct. That is much less the case with respect to an exclusionary rule remedy, however. The exclusionary provision operates only upon the communication itself, depriving it of evidentiary value, rather than against the person or property of the interceptor.
It would not be at all unreasonable for the Legislature to have desired to give that remedy the broader sweep — to make a communication intercepted without consent and not otherwise authorized inadmissible in evidence, without regard to the mental state of the person who made the interception, even if, for purposes of establishing civil or criminal liability, it required willfulness on the part of the interceptor. For one thing, there may be circumstances under which the person who unlawfully intercepted the communication is not subject to criminal or civil prosecution in Maryland, and the only issue is whether a Maryland court should, in effect, bless the unlawful conduct by permitting the communication to be admitted into evidence. From the point of view of the person whose conversation was intercepted without his or her consent and is later sought to be used in evidence, the interceptor’s mental state at the time of the interception is of marginal relevance. Whether the interception was done willfully or non-willfully, the violation of the person’s right to privacy was the same.
Accordingly, subject to the caveat noted above — our decision not to address in this case whether the exclusionary rule would apply when the communication is offered against the interceptor himselfiherself — we hold that a communication intercepted without the consent of all parties to the conversation, unless the interception was otherwise specifically authorized under the subtitle, is inadmissible in evidence.
*67Judge Rodowsky disagrees with our construction of § 10-405 and would hold that (1) willfulness is required as a condition of exclusion, and (2) in this case, the interception was not willful.
The post-conviction court concluded, from the elaborate attempt by Horn and Perry to conceal their connection and from the fact that, of all of the recordings discovered in Horn’s apartment, only this 22-second snippet existed, that Horn’s recording of this one conversation must have been inadvertent. If that is so, the recording would not have been “willful,” however that term may reasonably be defined. Because of our conclusion that willfulness is not required as a condition of exclusion, it is unnecessary for us to consider whether the recording by Horn was willful or inadvertent. Were we called upon to review the lower court’s finding, however, we would hold that, on the record in this case, it was clearly erroneous.
The finding of inadvertence is a finding of fact, which, if before us, we would review under the clearly erroneous standard. Maryland Rule 8 — 131(c) makes clear that an appellate court will not set aside a trial court judgment on the evidence unless clearly erroneous, and due regard will be given to the opportunity of the trial court to judge the credibility of the witnesses. In this instance, there appear to have been no credibility determinations, as such. The court’s finding of inadvertence rested solely on the inference it drew from the two circumstances noted, about which there was no substantial dispute.
In the absence of any other evidence bearing on the issue, that inference would be a permissible, though certainly not a necessary or compellable, one. The fact that Horn and Perry went to great lengths to preclude anyone else from discovering their relationship does not necessarily mean that Horn would not intentionally create some evidence of the relationship for his own purposes. In retrospect, it may have been a foolish thing to do, as in retrospect the taping of conversations in the Oval Office of the White House may have been a foolish *68thing to do, but that does not preclude a finding that the taping was nonetheless deliberate and intentional, in the belief that the tapes would never fall into hostile hands. Underhill, relied upon by the post-conviction court, is a clear example of co-conspirators intentionally taping incriminating conversations. There would be no need for us to speculate here as to why Horn might have intentionally recorded the conversation with Perry; the point is only that the camouflaging of their relationship does not lead inexorably, as the court supposed, to a conclusion that the tape in question was made inadvertently.
More important, in drawing the inference of inadvertence, the court appears to have overlooked entirely several other significant items of evidence directly bearing on the issue. Tiffany Horn, who lived with her father for about three months while she was in California from the autumn of 1989 until the end of the summer of 1991, and who visited with him periodically in 1992, confirmed that her father had an answering machine, that there were cassette tapes that went with the machine, and that he taped calls. Consonant with that testimony was the testimony of Detective Wittenberger and the physical evidence of the various cassette and micro-cassette tapes found in Horn’s apartment. As noted, there were 12 micro-cassette tapes and 56 regular cassette tapes. The police listened to those tapes, and Detective Wittenberger testified that they recorded conversations Horn had with various people — with Mrs. Horn and other family members, friends, and attorneys — emanating both from calls made to Horn’s home and calls that he placed. The tapes also recorded messages left on Horn’s answering machine.
Wittenberger described the answering machine itself, which the police still had in their possession but which was never offered into evidence. He said that the machine had two “setups.” It could be on a “no ring delay,” which meant that “the tape was immediately activated when the phone call came in,” or on a “ring delay,” which meant that, “after four rings, the answering machine would pick up.” At that point, “the tape would activate itself and start recording.” Once the machine activated, it would start to record automatically, even if Horn *69picked up the phone. The micro-cassettes, Wittenberger said, each captured between 30 and 60 minutes of conversation. Some of them had conversations recorded over other conversations, indicating that the tape had been rewound and new conversations recorded.
This evidence establishes, beyond doubt, that Horn did not use his answering machine simply to record messages when he was not available to take the call, which is the normal function of such devices. It indicates, rather, that (1) he routinely taped all or most of the conversations he had, including calls that he placed, and (2) he retained those taped conversations. There is a fair inference that conversations initially recorded on the micro-cassette tapes were re-recorded on the larger cassette tapes, as there is no evidence that the answering machine would accommodate both size of tapes. The fact that he had retained between six and twelve hours of conversation on the micro-cassette tapes and perhaps 100 hours or more on the larger cassettes is telling evidence that the conversations recorded on those tapes were not recorded inadvertently. The fact that the 22-second conversation with Perry was at the end of a tape and that that tape, too, was retained indicates that he recorded the conversation intentionally. Given the weakness of the inference drawn by the post-conviction court solely from the efforts by Horn and Perry to hinder any public awareness of their contacts, this evidence, never mentioned, and therefore probably not considered, by the court would convince us that the factual conclusion drawn from that inference was clearly erroneous. The whole of this record shows quite clearly that Horn’s interception of the conversation with Perry was deliberate, purposeful, and intentional, and therefore willful. Unless consented to by Perry, the interception would therefore have been unlawful, even under Judge Rodowsky’s view of § 10-405.
(3) Consent
Because it found that Perry, as a co-conspirator, could not invoke the protection of the wiretap law and because it found, alternatively, that willfulness was required on Horn’s part as a *70condition to suppression and that the conversation was not recorded willfully, the post-conviction court never addressed the question of whether Perry had consented to having the conversation recorded. As we have rejected those findings, it becomes critical to deal with the issue of consent.
Perry averred (belatedly) at trial, and maintained throughout the post-conviction proceeding, that he never consented to the recording of his conversation. He placed into evidence at the post-conviction hearing an affidavit to that effect, although we have been unable to locate that affidavit in his record extract. The State never contested Perry’s averment of non-consent. It made no argument to us, either in its answer to the Application for Leave to Appeal or in its brief, that Perry did, in fact, consent to having the conversation recorded. Nor does it appear that the State ever contested Perry’s statement at the post-conviction hearing. Thus, there is no issue in this case that Perry did not consent to having his conversation recorded by Horn.
(4) Conclusion
As we have concluded that Horn unlawfully intercepted the 22-second conversation with Perry, without Perry’s consent, it follows that the tapes made of that conversation (Exhibits 312 and 342) and the testimony identifying the voices on the tapes were inadmissible under § 10-405.
C. Harmlessness
There is a dispute between the parties over what standard of harmlessness, or prejudice, should be applied if, as we have done, we were to conclude that admission of the challenged evidence was in error. The post-conviction court accepted the State’s argument that, because the issue was being addressed in a post-conviction proceeding, the two-prong test of Strickland v. Washington, supra, 466 U.S. 668, 104 S.Ct. 2052, 80 L.Ed.2d 674 is applicable. Perry maintains that, because we directed the post-conviction court to hold the equivalent of a pre-trial suppression hearing and the issue was admissibility vel non, the harmless error standard of Dorsey v. State, *71supra, 276 Md. 638, 350 A.2d 665 applies and that the judgment must be set aside unless we are convinced that the error was harmless beyond any reasonable doubt. Neither party is entirely correct.
This dispute arises largely because of the unusual posture of the case. In Perry’s direct appeal, he argued, first, that the trial court erred in permitting further reference to and evidence regarding the tape and in failing to instruct the jury to disregard all prior testimony regarding the tape. As noted above, his argument was premised, in part, on the mistaken assumption that the tapes had not yet been admitted into evidence when he made his wiretap law objection. Recognizing, nonetheless, the lurking problem of waiver or non-preservation, Perry argued, alternatively, that counsel’s failure to make a timely objection to the evidence amounted to Constitutionally ineffective assistance of counsel.
Although the two arguments are independent and quite different — one involving a statutory rule of evidence and the other the State and Federal Constitutional rights to the assistance of counsel — we considered them together. As to the issue of admissibility, we noted that, ordinarily, that issue would be resolved at a pre-trial suppression hearing at which each of the parties would have the opportunity to present the relevant facts and argument, that, because no such hearing was held, the parties did not have that opportunity, that the issue was complex and required further factual development, and that it would be inappropriate for us then to resolve it on the incomplete record made at trial. We determined that “in order to approach the instant matter fairly, the parties should be given substantially the same opportunity to develop a factual record, and legal arguments based thereon, in presenting and responding to Perry’s belated suppression motion that they would have enjoyed in presenting and responding to a pre-trial suppression motion.” Perry, supra, 344 Md. at 226, 686 A.2d at 287.
For much the same reason, we rejected Perry’s invitation to resolve the ineffective assistance of counsel argument in the *72direct appeal. As to that also, we noted “the lack of fact-findings bearing-on whether there was a violation and whether it was willful.” Id. at 227, 686 A.2d at 287. Accordingly, we made clear that our affirmance of the judgment was without prejudice to Perry’s raising on post-conviction review both his contention that the evidence should have been excluded under the Maryland wiretap law and his complaint, if that contention were held to have been waived or not otherwise preserved, that counsel was ineffective in not making a more timely objection.
The post-conviction court, unfortunately, seemed to lose sight of the fact that both issues were before it, the second dependent on the first, and that led it, erroneously, to conclude that the harmless error standard of Dorsey “is not appropriate in a post-conviction proceeding.” The court did not believe that it had “the power to reverse the trial court for an alleged error of law,” and thus, although it conducted the suppression hearing, it said that it did so merely “to determine whether an error was committed by trial counsel sufficient to support a claim of ineffective assistance of counsel under the guidelines of Strickland and Oken.”
The Post Conviction Procedure Act is not limited to claims of ineffective assistance of counsel. Maryland Code, Article 27, § 645A(a)(l) permits a person convicted of a crime and either incarcerated or on parole or probation, who claims that the' sentence or judgment was imposed in violation of the Federal or State Constitution or the laws of this State, to institute a proceeding under the Act. Under that provision, a host of issues arising from alleged trial error are within the purview of the Act. See, for example, Jourdan v. State, 275 Md. 495, 341 A.2d 388 (1975) (claim of double jeopardy); Austin v. Director, 237 Md. 314, 206 A.2d 145 (1965) (evidence seized pursuant to unlawful arrest); Cherry v. State, 305 Md. 631, 506 A.2d 228 (1986) (denial of right to make closing argument); Baldwin v. Warden, 243 Md. 326, 221 A.2d 73. 243 Md. 326, 221 A.2d 73 (1966) (use of perjured police testimony); State v. Thornton, 73 Md.App. 247, 533 A.2d 951 (1987) (guilty plea unsupported by statement of facts); Davis *73v. Director, 3 Md.App. 205, 238 A.2d 573 (1968) (erroneous admission of confession). We expressly recognized that the claim of evidentiary error — the admission of the tapes and associated testimony — was within the purview of the Act when, in the direct appeal, we made clear that our affirmance of the judgment was without prejudice to Perry’s raising on post-conviction review “his contention that Exhibit 312 should have been excluded under the Maryland wiretap statute.”
When dealing with such a trial error issue in a post-conviction proceeding, apart from considering any applicable procedural bars, such as whether the issue was waived or finally litigated, the court undertakes essentially the same legal analysis that would be undertaken by an appellate court on direct appeal, supplemented, of course, by such additional evidence as is appropriate. The substantive issue is whether the alleged error was, in fact, committed, and, if so, whether the error was harmless. The test for harmlessness is necessarily the same as would be applied by the appellate court if the issue had arisen on direct appeal — the Dorsey standard of whether the reviewing court is convinced that the error was harmless beyond any reasonable doubt. The two-prong test enunciated in Strickland, explicated in Lockhart v. Fretwell, 506 U.S. 364, 113 S.Ct. 838, 122 L.Ed.2d 180 (1993), and applied by us in Oken v. State, 343 Md. 256, 681 A.2d 30, cert. denied, 519 U.S. 1079, 117 S.Ct. 742, 136 L.Ed.2d 681 (1997) and Wiggins v. State, 352 Md. 580, 724 A.2d 1. cert. denied, — U.S. —, 120 S.Ct. 90, 145 L.Ed.2d 76 (1999) is peculiarly applicable to ineffective assistance of counsel claims arising from the Constitutional right to the assistance of counsel and has no bearing on direct claims of trial error. See Kimmelman v. Morrison, 477 U.S. 365, 106 S.Ct. 2574, 91 L.Ed.2d 305 (1986). The lesser standard of prejudice that forms the second prong of a Strickland analysis looks at the prejudice emanating from counsel’s deficient performance, not from any error committed by the court at trial.10
*74Accordingly, we hold that the post-conviction court erred in applying a Strickland prejudice analysis to the issue of whether the tapes and testimony were wrongfully admitted at trial. We have determined that that evidence was wrongfully admitted, and the question then becomes whether that admission was harmless beyond a reasonable doubt. We conclude that it was not. The post-conviction court recognized that the 22-second tape “was an important piece of evidence.” We have already described its importance, being the only direct physical evidence of contact between Horn and Perry and contradicting, in a dramatic way, their pre-trial assertions that they never spoke to one another. It was important enough for the State to have four witnesses identify the voices on the tape and to play the tape in court four times, twice during the State’s closing argument. Notwithstanding the weight of the other evidence produced against Perry, we cannot conclude that the erroneous admission of the tapes and the voice-identification testimony was harmless beyond a reasonable doubt.
D. Was The Objection Waived?
The issue of waiver is important. If Perry’s complaint about the admission of the tapes and identifying evidence, which we have found to be valid, was not effectively waived by the failure of counsel to make a timely objection, the judgment of the trial court would have been in error and, for that reason, Perry would be entitled to a new trial. If, on the other hand, the complaint was effectively waived by counsel’s failure to make a timely objection, the trial court’s judgment *75would not be in error, and Perry’s quest for post-conviction relief would depend on a finding that counsel’s lack of diligence, which alone caused the judgment of the trial court to stand, amounted to a State or Federal Constitutional deficiency-
When counsel first raised a wiretap law objection at trial, the court determined that the objection had been waived because (1) Perry had failed to move pre-trial to suppress the evidence, as required by Maryland Rule 4-252, and (2) the objection, in any event, came too late at trial — after the tapes had been admitted into evidence and one of them had already been played in court. On appeal, we noted the existence of CJ § 10 — 408(i), which allows a motion to suppress an unlawfully intercepted communication to be made “before or during the trial,” and we made two preliminary comments regarding that statute. First, we held that it was not necessary for Perry to have called the court’s attention to that statute in order to preserve his argument that the court should have considered his mid-trial motion. We then stated that we could not determine, on the record then before us, whether, had the court conducted a suppression hearing when the objection was made, Perry’s motion would have been granted. Accordingly, we declined to address the matter further but noted that our decision not to do so was without prejudice to Perry’s relying on § 10-408(i) in a post-conviction hearing. Perry, supra, 344 Md. at 229, 686 A.2d at 286. In acknowledging the existence of § 10-408®, we did not suggest that it would suffice to trump the requirement of Rule 4-252, or permit a defendant to raise the issue at any time during the trial, even after the challenged evidence was already admitted and made known to the jury; we noted it only to allow its scope and function to be considered in a post-conviction proceeding.
In his petition for post-conviction relief, Perry cited § 10-408® in support of his argument that the trial court erred in ruling that his objection was waived because of his failure to move pre-trial to suppress the evidence. The post-conviction court never addressed that issue. Having concluded, as a matter of law, that the evidence was admissible, the court *76found no need to address the issue of waiver. In this appeal, the State, in a footnote in its brief, urges that Rule 4-252, rather than § 10 — 408(i), applies and that the trial court’s ruling was therefore correct. Its point is that the Rule “unlike Section 10 — 408(i), deals only with criminal trials where pretrial suppression hearings are the norm.”
It is not necessary for us, in this appeal, to address the apparent conflict between Rule 4-252(a) and § 10-408, for it is clear that, even if we were to conclude that the statute prevails and that, pursuant to it, a motion to suppress an unlawfully intercepted wire communication may be made during the trial notwithstanding the failure to make such a motion pre-trial in accordance with the rule, Perry waived his right to complain by failing to make his objection when the evidence was first offered.
Neither party has cited to us, and we have been unable to locate, any indication in the legislative history of the statute of what, precisely, the Legislature meant when, in 1977, it amended the initial version of the wiretap bill then before it to depart from the Federal approach and to allow motions to suppress to be made “during” a trial. Although it seems clear that the General Assembly did not intend to foreclose an objection if not made before trial, as the Federal Act did, we do not believe that it intended to override well-established principles of trial procedure, one of which requires that objections to evidence be made at the time the challenged evidence is first offered. See Martin v. State, 208 Md. 66, 72, 98 A.2d 8, 11 (1953) (reviewing earlier cases and confirming that “one against whom evidence is offered must object as soon as the applicability of the evidence is known or should reasonably have been known to him,” and that an objection not made at that time is waived). That principle is now codified in Maryland Rule 4-323(a) and its civil action and district court counterparts, Rules 2-517(a) and 3-517(a): “An objection to the admission of evidence shall be made at the time the evidence is offered or as soon thereafter as the grounds for *77objection become apparent. Otherwise, the objection is waived.”
The requirement of a contemporaneous objection is a necessary and salutary one, designed to assure both fairness and efficiency in the conduct of trials. A party cannot be permitted to sit back and allow the opposing party to establish its case, or any part of its case, through unchallenged evidence and then, when it may be too late for the opposing party to recover, to seek to strike the evidence. The “sporting theory” of trial does not go that far, and we do not believe that, by allowing suppression motions to be made “during” trial, the Legislature intended to introduce that pernicious element into our jurisprudence.
In this case, the trial judge found no good cause, based, at least in part, on the fact that counsel did not make his objection until the 11th day of trial — after the tapes were already in evidence and after one of them had been played for the jury. Counsel knew when they first heard the tape that it, coupled with the likely evidence of voice identifications, was an important and damaging piece of evidence, and they knew that Horn had made the recording without Perry’s consent. In 1991 — more than three years before counsel learned of the Horn tape — this Court decided Mustafa v. State, supra, 323 Md. 65, 591 A.2d 481, expressly holding that a communication intercepted in another jurisdiction, but in violation of the Maryland wiretap law, was inadmissible in a Maryland court, even if the interception was not unlawful in the jurisdiction where it was made. Both the factual and legal information necessary to support a motion to suppress the Horn tape was therefore available to counsel (and through counsel to Perry) well before the commencement of trial. Other than counsel’s failure to recognize the significance of that information, there was no basis whatever for counsel, and thus Perry, to have abandoned the motion to suppress the Horn tape and wait until the tapes and at least one voice identification were already in evidence before the motion was effectively made. Accordingly, Perry’s complaint over the admission of State’s *78Exhibits 312 and 342 and the voice-identification testimony-relating to them was effectively waived, and, for that reason, the admission of that evidence was not reversible error.
E. Was Counsel’s Performance Constitutionally Deficient?
Perry has complained that, as a result of counsel’s failure to preserve an objection to the inadmissible and prejudicial conversation with Horn, he was denied the effective assistance of counsel guaranteed to him by Article 21 of the Maryland Declaration of Rights and the Sixth Amendment to the United States Constitution. The standard to be applied in determining whether counsel’s representation comported with the requirements of the Sixth Amendment is that enunciated in Strickland v. Washington, supra, 466 U.S. 668, 104 S.Ct. 2052, 80 L.Ed.2d 674, as more recently explicated in Lockhart v. Fretwell, supra, 506 U.S. 364, 113 S.Ct. 838, 122 L.Ed.2d 180. As we recounted that standard in Wiggins v. State, 352 Md. 580, 724 A.2d 1, cert. denied, — U.S. —, 120 S.Ct. 90, 145 L.Ed.2d 76 (1999), to prove a claim of Constitutionally ineffective assistance of counsel, the defendant must establish that counsel’s performance was deficient and that the deficiency prejudiced the defense. To show a deficiency, the defendant must “(1) demonstrate that counsel’s acts or omissions, given the circumstances, ‘fell below an objective standard of reasonableness considering prevailing professional norms,’ ... and (2) overcome the presumption that the challenged conduct ‘be considered sound trial strategy.’ ” Id. at 602, 724 A.2d at 12, quoting in part from Oken v. State, supra, 343 Md. 256, 283, 681 A.2d 30, 43. To show that a deficiency prejudiced the defense, the defendant “must establish that counsel’s error was ‘so serious as to deprive [him] of a fair trial, a trial whose result is reliable.’ ” Id. Those principles, as stated, apply as well to Article 21 — the Maryland analogue to the Sixth Amendment.
Based on counsel’s uncontroverted admission, the post-conviction court found as a fact that counsel’s failure to lodge a timely objection to the wiretap evidence was not a matter of *79trial strategy or tactics but was instead the product of his failure to realize that Perry had a good basis for suppression — in the court’s words, their “ignorance of the law.” Because the court went on to conclude that Perry suffered no Constitutional prejudice from that deficiency, however, it made no finding as to whether the deficiency fell below an objective standard of reasonableness considering prevailing professional norms.
There can be little doubt in this case that the omission to move timely to suppress the evidence, the almost certain effect of which was a waiver of any objection to the evidence, satisfied that test. Counsel correctly recognized the importance of the evidence when they first learned of it; contemporaneously with their discovery of the tape, they had all of the factual and legal information necessary to support a motion to suppress it; and they were well aware of the requirements not only of Maryland Rule 4-252, requiring that a motion to suppress be made before trial, but of the requirement that a contemporaneous objection be made at trial. As we have noted several times, there was already pending a sufficient motion to achieve that result, but it was not pursued. Not until the eleventh day of trial, after the tapes had been admitted into evidence and played in open court was an objection based on the wiretap law made. Without detracting from the general competence of the attorneys involved, it is clear that their omission to pursue a timely motion to suppress this evidence fell significantly below the objective standard of reasonableness and that the first prong of Strickland was therefore established. See Kimmelman v. Morrison, supra, 477 U.S. 365, 106 S.Ct. 2574, 91 L.Ed.2d 305.
The question of prejudice is not so facile. The essence of the ineffective assistance claim is that “counsel’s unprofessional errors so upset the adversarial balance between defense and prosecution that the trial was rendered unfair and the verdict rendered suspect.” Lockhart v. Fretwell, supra, 506 U.S. at 369, 113 S.Ct. at 842, 122 L.Ed.2d at 189 (quoting from Kimmelman v. Morrison, supra). It is a high threshold, a difficult test to meet. As we pointed out in Oken v. State, *80supra, 343 Md. at 284, 681 A.2d at 44, citing Williams v. State, 326 Md. 367, 374-76, 605 A.2d 103, 106-07 (1992), and Bowers v. State, 320 Md. 416, 425-27, 578 A.2d 734, 738-39 (1990), the petitioner must show “that there is a substantial possibility that, but for counsel’s unprofessional errors, the result of the proceeding would have been different,” although that test “should not focus solely on an outcome determination, but should consider ^whether the result of the proceeding was fundamentally unfair or unreliable.’ ” Oken v. State, supra, 343 Md. at 284, 681 A.2d at 44, quoting from Lockhart v. Fretwell, supra, 506 U.S. at 369, 113 S.Ct. at 842, 122 L.Ed.2d at 189.
In Kimmelman v. Morrison, supra, the Court dealt with a similar situation. An important item of evidence in a rape case was a bedsheet, seized from the defendant’s home without benefit of a warrant, that contained semen stains and hair samples which other evidence connected to the defendant and the victim. Counsel objected at trial to admission of the bedsheet, on Fourth Amendment grounds, but, because he had not moved to suppress the evidence before trial, as required by the New Jersey equivalent of Maryland Rule 4-252, the objection was held to have been waived. Counsel contended that he was unaware of the seizure of the bedsheet until it was offered at trial, but that unawareness, suspect in itself because of certain information forwarded to him by the prosecutor, in any event stemmed from his failure to conduct any discovery. He conducted no discovery, he said, because he believed that it was the State’s obligation to supply discovery without request, a belief that the Supreme Court found wholly without foundation. Morrison’s conviction was affirmed, and the case reached the Supreme Court on Federal habeas corpus. The claim was ineffective assistance of counsel based on the attorney’s failure to move timely to suppress the evidence arguably seized in violation of the Fourth Amendment.
In Stone v. Powell, 428 U.S. 465, 96 S.Ct. 3037, 49 L.Ed.2d 1067 (1976), the Court held that, when a State has provided an opportunity for full and fair litigation of a Fourth Amendment claim, a State prisoner may not be granted Federal habeas *81corpus relief on the ground that evidence obtained in violation of that Amendment was admitted at his/her trial. The issue presented in Kimmelman was whether that approach also applied to a Sixth Amendment claim of ineffective assistance of counsel when the ineffective assistance stemmed from the failure to raise or preserve the Fourth Amendment claim.
The principal holding of the Court was that Stone did not apply to the Sixth Amendment claim. The Fourth Amendment was not a trial right, but a general protection for all citizens against governmental intrusion; to prevail, the defendant need show only that the search or seizure in question was unlawful and that it violated his reasonable expectation of privacy. The right to counsel, on the other hand, is a fundamental right of criminal defendants, designed to assure fairness and the legitimacy of the adversary judicial process. The essence of an ineffective assistance claim, as noted, is that counsel’s error upset the adversarial balance to the point that the trial was rendered unfair and the verdict suspect. When the incompetence rests entirely on the failure to litigate a Fourth Amendment claim, the defendant must prove not only that the Fourth Amendment claim is meritorious but, to establish the required prejudice under Strickland, that “there is a reasonable probability that the verdict would have been different absent the excludable evidence.” Kimmelman, supra, 477 U.S. at 375, 106 S.Ct. at 2583, 91 L.Ed.2d at 319.
Having reached that conclusion, the Kimmelman Court then turned to the Strickland analysis. The District Court, acting before Strickland was decided, had granted relief by applying a Dorsey v. State-type of harmless-beyond-a-reasonable-doubt standard and concluding that Morrison had been prejudiced. The Third Circuit Court of Appeals, applying Strickland, concluded that counsel had been grossly deficient but remanded for further consideration of the prejudice issue. The Supreme Court had no difficulty on the record before it in holding that counsel’s performance was Constitutionally deficient, and it was urged to rule upon the prejudice issue as well. It declined to do so, however, and affirmed the remand, noting that no evidentiary hearing had been held on the merits *82of the Fourth Amendment claim, that the State was entitled to an opportunity to establish that the seizure was lawful, and that, even if it was not, Morrison “may be unable to show that absent the evidence concerning the bedsheet there is a reasonable probability that the trial judge would have a reasonable doubt as to his guilt.” Id. at 391, 106 S.Ct. at 2591, 91 L.Ed.2d at 329 (Emphasis added).
Justice Powell, joined by Chief Justice Burger and then-Justice Rehnquist, filed a concurring opinion in which he posed a question not raised by the parties or addressed by the Court — whether the admission of reliable, but unlawfully seized, evidence could ever, of itself, satisfy the prejudice prong of Strickland. Justice Powell expressed the view that the harm suffered by Morrison “is not the denial of a fair and reliable adjudication of his guilt, but rather the absence of a windfall,” and that “[bjecause the fundamental fairness of the trial is not affected, our reasoning in Strickland strongly suggests that such harm does not amount to prejudicial ineffective assistance of counsel under the Sixth Amendment.” Id. at 396, 106 S.Ct. at 2594, 91 L.Ed.2d at 333. He explained that admission of the bedsheet harmed Morrison “only in the sense that it helped the fact-finder make a well-informed determination of respondent’s guilt or innocence,” and, in his view, nothing in Strickland compelled a conclusion that such an injury establishes prejudice for purposes of the ineffective assistance claim. Powell concurred in the remand because neither the parties nor the lower courts had considered that question and because it was not encompassed in the petition for certiorari. Id. at 397, 106 S.Ct. at 2594, 91 L.Ed.2d at 334.
On remand, New Jersey decided not to contest the illegality of the seizure, but asserted Justice Powell’s view that the introduction of reliable evidence can never satisfy the prejudice prong of Strickland, even if that evidence was inadmissible because it was unlawfully obtained. The District Court expressly rejected that argument, pointing to the statement in the majority opinion that approved of habeas corpus review of an ineffective assistance claim “where counsel’s primary error is failure to make a timely request for the exclusion of illegally *83seized evidence — evidence which is ‘typically reliable and often the most probative information bearing on the guilt or innocence of the defendant.’ ” Morrison v. Kimmelman, 650 F.Supp. 801, 805 (D.N.J.1986) (quoting from Kimmelman, supra, 477 U.S. at 879, 106 S.Ct. at 2585, 91 L.Ed.2d at 322). The judge noted also that “were petitioner precluded, as a legal matter, from establishing prejudice under the facts of this case, this matter would never have been remanded to this Court for further consideration. There would have been no point to it.” Morrison, supra, 650 F.Supp. at 805.
Addressing the prejudice issue, the court noted the importance of the bedsheet as corroborating the testimony of the victim, which was riddled with inconsistencies. Because the State essentially conceded the illegality of the seizure, the Fourth Amendment violation was established. The trial judge, it concluded, faced a close decision, and but for counsel’s errors, the court found it highly probable that the eviden-tiary picture would have been very different. In the court’s judgment, it was reasonably probable that, but for counsel’s errors, the balance would have tilted in favor of Morrison’s version. On that basis, which, in light of the later pronouncements in Lockhart may be an incorrect one, the court found prejudice in the particular case and granted the writ.
The Seventh Circuit Court of Appeals has embraced Justice Powell’s view and held, expressly, that “under Strickland no prejudice exists when evidence gathered in violation of the Fourth Amendment is erroneously admitted at trial.” Holman v. Page, 95 F.3d 481, 492 (7th Cir.1996). “It is inconsistent with the function of the exclusionary rule,” the court held, “to permit a criminal defendant on federal habeas review to claim prejudice because but for his counsel’s incompetence on the suppression issue he would have gotten away with the crime.” Id. at 491. That is not the kind of prejudice, it said, anticipated by Strickland. Exclusion of the evidence does not impact on the correctness of the verdict but rather “enhances the truthfinding process by permitting the consideration of valuable probative evidence.” Id. See also United States v. Williams, 106 F.3d 1362 (7th Cir.1997); Spreitzer v. Peters, *84114 F.3d 1485 (7th Cir.1997); United States v. Jones, 152 F.3d 680 (7th Cir.1998).
To the best of our knowledge, the Seventh Circuit stands alone in that approach. The Eleventh Circuit Court of Appeals has taken an opposite approach. In Van Huynh v. King, 95 F.3d 1052 (11th Cir.1996), a State prisoner complained on Federal habeas corpus about the failure of his trial counsel to move timely to suppress evidence seized from his wallet at the time of his arrest. Counsel claimed that the decision not to file a pre-trial motion was strategic; his goal was to create an appellate issue. Accepting that argument, the District Court denied relief. The Court of Appeals disagreed with that determination and held that counsel’s performance was objectively unreasonable and therefore deficient— that no reasonable attorney would forego the litigation of a meritorious claim in order to set up an issue for appeal or collateral review. It declined to address the prejudice question, however, without the benefit of the District Court’s finding on the validity of the underlying Fourth Amendment claim. Recognizing that a good Fourth Amendment claim alone would not guarantee success on a Sixth Amendment claim, it nonetheless concluded that “if the district court finds that Huynh’s Fourth Amendment right was violated and as a result that, had counsel filed a motion to exclude this evidence, it likely would have been granted, then Huynh was prejudiced by his lawyer’s unreasonable performance as a matter of law.” Van Huynh, 95 F.3d at 1058. That determination, obviously, is a rejection of the notion that failure to pursue a Fourth Amendment claim can never be prejudice under Strickland.
The California Supreme Court also has rejected, at least implicitly, the notion that counsel’s failure to move to suppress reliable evidence can never constitute Strickland prejudice. In In re Neely, 6 Cal.4th 901, 26 Cal.Rptr.2d 203, 864 P.2d 474 (1993), the court had before it a habeas corpus petition based on the failure of trial counsel to move to suppress a tape of an incriminating conversation between the defendant and a State agent instigated by the State while the defendant was represented by counsel, and thus in violation of Massiah v. United *85States, 377 U.S. 201, 84 S.Ct. 1199, 12 L.Ed.2d 246 (1964). The court found both deficient performance and prejudice. As to the latter, the court concluded that there was a reasonable probability that had the tape recording been suppressed, the outcome with regard to guilt would have been more favorable to the defendant, and it therefore granted the writ. The majority opinion did not discuss Justice Powell’s view but simply acted inconsistently with it. In a concurring opinion, however, Justice Arabian took note of Justice Powell’s view and, though sympathetic with that view, nonetheless rejected it as a statement of current law, observing that “[a] holding that prejudice has not been shown for these reasons would effectively render meaningless the majority opinion in [Kim-melman ] and would run counter to broad language found in that opinion.” Id., 26 Cal.Rptr.2d 203, 864 P.2d at 488.
We cannot, of course, predict how the Supreme Court might ultimately resolve this question in the context of the Sixth Amendment, but, with all due respect to Justice Powell, the concurring Justices, and the Seventh Circuit Court of Appeals, we reject as a matter of independent Maryland law under Article 21 of the Declaration of Rights the notion that a defendant is never prejudiced under a Strickland-type analysis when reliable, though legally inadmissible, evidence is admitted against him or her.11 The issue in a Sixth Amendment/Article 21 context is not the scope, function, or reach of *86the exclusionary rule, whether judicially designed to protect a Constitutional right or created by the Legislature to protect a statutory one, but whether the defendant received the effective assistance of counsel. Nor is it a matter of an inappropriate “windfall.” The most fundamental underpinning of our criminal justice system, upon which most, if not all, other rights rest, is that a defendant is presumed to be innocent, and it is the obligation of the State to prove guilt, upon proper procedure and by admissible evidence, beyond a reasonable doubt. It is not a “windfall” when counsel succeeds in suppressing evidence that, for whatever reason, is inadmissible. That is precisely what counsel is there to do — to make the State prove its case by legally admissible evidence. It is difficult for us to comprehend either a logical or a practical basis for a conclusion that the defendant is not prejudiced, as a matter of law and without regard to any other circumstance, when counsel fails in that very basic responsibility.
*87Our focus, therefore, under the Sixth Amendment and, independently, under Article 21, must be on whether the admission of the tape recording and the voice-identification testimony relating to it “so upset the adversarial balance between defense and prosecution that the trial was unfair and the verdict rendered suspect.” Lockhart v. Fretwell, supra, 506 U.S. at 369, 113 S.Ct. at 842, 122 L.Ed.2d at 189 (quoting from Kimmelman, supra), whether, as noted in Oken, “there is a substantial possibility that, but for counsel’s unprofessional errors, the result of the proceeding would have been different.” As we have indicated several times, this evidence was extremely important. It affirmatively and persuasively established contact between Horn and Perry and, depending on how the jury interpreted the message, may have proved contact on the very morning the murders were committed. The fact that the post-conviction court did not believe that the tape captured that particular conversation is irrelevant; the prosecutor suggested that prospect to the jury and, although the conversation is certainly ambiguous, that suggestion was by no means a frivolous one. It is true, of course, that there was a great deal of other, documentary evidence from which contact could have been found, but, other than the testimony of Thomas Turner given under a grant of immunity, most of it was circumstantial — calls from pay telephones with no direct proof of who the caller was. Absent proof of contact with Horn, there was little or no evidence connecting Perry either with the murders or with any of the victims. Why would a stranger from Detroit want to break into a home in Maryland and murder its occupants, including a helpless child? To establish why, the prosecutor played the tape for the jury four times during the trial, twice during his closing argument.
It is always a judgment call in determining whether a circumstance sufficed to render the verdict unreliable. In this case, we conclude, under both the Sixth Amendment and, independently, under Article 21, that it did, and, for that reason, shall reverse the judgment of the post-conviction court and remand for the court to order a new trial for Perry.
*88JUDGMENT REVERSED; CASE REMANDED TO CIRCUIT COURT FOR MONTGOMERY COUNTY FOR ENTRY OF ORDER IN CONFORMANCE WITH THIS OPINION; MONTGOMERY COUNTY TO PAY THE COSTS.
Dissenting Opinion by RODOWSKY, J., in which ROBERT L. KARWACKI (retired, specially assigned), JJ., joins in.. Our discussion of the admissibility of the tape recorded conversation assumes the continuing validity and the applicability of Mustafa v. State, 323 Md. 65, 591 A.2d 481 (1991). In that case, we held that the fruits of an intercepted wire communication were inadmissible in a Maryland court if the interception was in violation of the Maryland wiretap law, even though (1) the interception occurred in another jurisdiction, and (2) the interception was not unlawful in that jurisdiction. That ruling constituted a policy-oriented construction of the Maryland statute, carrying forth what we regarded to be the legislative intent. Although the General Assembly has met in eight annual sessions since the Mustafa opinion was filed, it has not seen fit to alter that ruling through an amendment to the statute. Judge Cathell urges that we overrule Mustafa for reasons that were considered by this court when that case was decided and that were articulated in Judge McAuliffe’s dissent. In a brief footnote to its brief, the State has asked us to overrule Mustafa but has not sought to distinguish this case from it. As the Legislature has apparently acquiesced in our construction of the statute, we see no reason to disturb it now.
. Horn had grown up in Detroit and still had family there.
. It is fortunate that there is no disagreement about the contents of the conversation, as Exhibit 342 seems to have become misplaced. It clearly was before the post-conviction court, but it was not transmitted to us with the record and we have been unable to locate it in the circuit court.
. In his brief, Perry asserted that “[his] objection to State’s Exhibit 312 and any evidence derived therefrom was brought up while it was still within the power of the court to correct the error. The exhibit itself had not yet been entered into evidence, although it had been played for the jury during the testimony of Cynthia Turner.” That last statement is not correct. As we have indicated above, and as we stated in our earlier opinion, 344 Md. at 223, 686 A.2d at 283, the tapes were admitted into evidence during the testimony of Detective Wittenberger on September 20, 1995. The wiretap objection was not made until September 29, 1995.
. As we indicated, counsel did file a pre-trial motion to suppress intercepted communications — a motion that, in our view, sufficed to raise the admissibility of State’s Exhibits 312 and 342. The relevant omission was in narrowing the argument on the motion to the government wiretaps and not pursuing the objection to the tape made by Horn. Both counsel and the post-conviction court nonetheless continually refer to the alleged deficiency as a failure to file a pre-trial suppression motion. Rather than correct that assertion each time we cite it, we shall treat the allegation as one of failing to pursue the suppression of the exhibits and testimony relating to them.
. Cert. denied sub nom. Rayburn v. United States, 482 U.S. 906, 107 S.Ct. 2484, 96 L.Ed.2d 376, sub nom. Tata v. United States, 483 U.S. 1022, 107 S.Ct. 3268, 97 L.Ed.2d 766, sub nom. Osborne v. United States, 484 U.S. 846, 108 S.Ct. 141, 98 L.Ed.2d 98, and sub nom. Person v. United States, 484 U.S. 821, 108 S.Ct. 81, 98 L.Ed.2d 43 (1987).
. There are two acceptable spellings of the word — "willful” and "wilful” — although, according to Webster’s New Universal Unabridged Dictionary (2d ed.1983), the former is the preferred spelling. The statute uses the one-1 version, and when quoting the statute, we shall as well. In text, however, we shall use the preferred "willful.”
. Both the State and Federal wiretap laws deal with wire, oral, and electronic communications. The communication at issue here was a wire communication, and, to avoid unnecessary repetitions, we shall speak of the statutes in that regard. We do not mean to suggest that, by limiting our discussion to wire communications, oral and electronic communications would be treated differently.
. The Governor noted in his veto message that the provision he found offensive was taken from § 2511(2) of the Federal Act, that it would allow "the police, and anyone else, to intercept, listen in, and record the private conversations of people where only one party to the conversation has given consent to such activity," and that the other party to the conversation "is thus subject to having his conversation intercepted without his knowledge, without prior court approval, and without any need to show probable cause to believe that criminal activity of any kind may be afoot.” Id. at 1924 — 25. That is what the Governor (and ultimately the General Assembly, as evidenced by its later decision to continue the requirement that all parties consent) found "frightening.”
. As a practical matter, it is not often that the post-conviction court addresses a claim other than ineffective assistance of counsel. In many *74instances a claim of trial error will either be found to have been waived by the petitioner’s failure to raise it at trial, on direct appeal, or in a prior collateral proceeding and the waiver is not excused {see Walker v. State, 343 Md. 629, 647-50, 684 A.2d 429, 438-39 (1996)), or, if raised and decided, it will usually be found to have been finally litigated. Ineffective assistance of counsel claims ordinarily, although not always, escape those procedural bars and therefore tend to predominate substantive post-conviction jurisprudence. That should not lead people into assuming that post-conviction remedies are necessarily limited to such claims, however, or that the standards peculiarly applicable to ineffective assistance of counsel claims apply in other contexts.
. We have traditionally regarded the right to counsel guaranteed under Article 21 as being the same right provided by the Sixth Amendment, and, in construing Article 21, we have followed and applied the decisions of the Supreme Court interpreting the Federal provision. See State v. Tichnell, 306 Md. 428, 440, 509 A.2d 1179, 1185, cert. denied, 479 U.S. 995, 107 S.Ct. 598, 93 L.Ed.2d 598 (1986) ("There is no distinction between the right to counsel guaranteed by the Sixth Amendment and Art. 21 of the Maryland Declaration of Rights....”); Lodowski v. State, 307 Md. 233, 513 A.2d 299 (1986); Harris v. State, 303 Md. 685, 496 A.2d 1074 (1985). In the context of ineffective assistance claims raised in post-conviction proceedings, we have therefore tended to focus on the Sixth Amendment jurisprudence, even when the claim is based on Article 21 as well, and, as a result, have applied a Strickland/Fretwell analysis to those claims. State v. Colvin, 314 Md. 1, 23-24, 548 A.2d 506, 517 (1988). We do so in this case as well.
*86With respect to the particular issue now in point, however, there is no controlling Supreme Court precedent supporting the Seventh Circuit Court's ruling. The issue is therefore an open one, both as a matter of Maryland law and, indeed, as a matter of Federal law outside the Seventh and Eleventh Circuits. In Michigan v. Long, 463 U.S. 1032, 1041, 103 S.Ct. 3469, 3476, 77 L.Ed.2d 1201, 1214 (1983), the Supreme Court held that "[i]f a state court chooses merely to rely on federal precedents as it would on the precedents of all other jurisdictions, then it need only make clear by a plain statement in its judgment or opinion that the federal cases are being used only for the purpose of guidance, and do not themselves compel the result that the court has reached.” See also Ohio v. Robinette, 519 U.S. 33, 117 S.Ct. 417, 136 L.Ed.2d 347 (1996); Arizona v. Evans, 514 U.S. 1, 115 S.Ct. 1185, 131 L.Ed.2d 34 (1995). For the reasons noted in this Opinion, we do not believe that the Seventh Circuit Court’s approach represents current Federal law, outside the Seventh Circuit, but even if it does, we make the "plain statement” that, for purposes of interpreting Article 21, the holdings of the Seventh and Eleventh Circuit' Courts are being used for guidance only and do not themselves compel the result we reach here. The conclusions announced in this Opinion on this issue constitute our construction of the independent Maryland Constitutional provision. If the Supreme Court were to rule upon the issue, we obviously would be bound by its judgment when interpreting the Sixth Amendment, and we certainly would give due and respectful consideration to it in any future construction of Article 21, but it would not serve, on its own, to alter the declaration made in this Opinion regarding Article 21.