Dissenting Opinion by
Mr. Justice Roberts:Today the plurality creates a strange new role for the trial judge in a criminal case — that of supercounsel for the defense. The plurality’s decision empowers the tidal judge sua sponte to impose upon an accused, over explicit counseled objection, an unwarranted mistrial. Such judicial usurpation of the defense function in this case destroys the essence of the double jeopardy guarantee. I dissent from the plurality’s refusal to recognize the denial of that guarantee.
The plurality arrives at its announced result by a gallimaufry of error, speculation, and departure from controlling legal principles. In concluding that another trial would not unconstitutionally place the accused twice in jeopardy for the same offense, the plurality nullifies Pennsylvania Rule of Criminal Procedure 1118(b), which specifies that only the defense may *460move for a mistrial. The plurality also repudiates Commonwealth v. Lauria, 450 Pa. 72, 297 A.2d 906 (1972), which expressly announced that rule 1118(b) “excludes ‘not only a motion by the Commonwealth but a grant of a mistrial by the court on its own motion.’ ” Id. at 75, 297 A.2d at 907.
Moreover, the plurality dismisses as insignificant the critical fact that appellant waived any possible prejudice. So too the plurality rejects Commonwealth v. Shaffer, 447 Pa. 91, 288 A.2d 727, cert. denied, 409 U.S. 867, 93 S. Ct. 164 (1972). There this Court held that speculative impressions of possible prejudice are constitutionally insufficient to sustain a conclusion of manifest necessity. Ignored also in the plurality’s result are the inexorable requirements of the Fifth Amendment of the Constitution of the United States. While declaring that “[t]his Court has previously followed the guidelines set forth ... by the [United States] Supreme Court,” the plurality now chooses to abandon the legal principles announced by that Court, other federal courts, and our Court.
The jurisprudential unsoundness inherent in the plurality’s determination is revealed in the realities of the trial record. Because “[a] full factual exposition is necessary to an understanding of appellant’s double jeopardy contention,” United States ex rel. Russo v. Superior Court, 483 F.2d 7, 9 (3d Cir.), cert. denied, 414 U.S. 1023, 94 S. Ct. 447 (1973), the critical facts must be stated fully.
About a year ago, this Court reversed appellant’s conviction of murder in the first degree and awarded a new trial because the trial judge erroneously denied appellant’s timely motion for a mistrial. Commonwealth v. Stewart, 449 Pa. 50, 295 A.2d 303 (1972).
Appellant’s new trial began on April 9, 1973. Twelve jurors and two alternates were selected, impaneled and sworn. It was then 3:13 p.m. and a recess *461was ordered. The trial judge returned to the bench at 3:47 p.m. In the absence of the jury, he summoned the prosecutor, appellant, and defense counsel, and in their presence stated: “The Court: Mr. Yoffe [Defense Counsel], the Court has an announcement to make to you, sir . . . [At Mr. Stewart’s first trial] Fletcher Smith, the father of the victim of the killing, Dorothy Stewart, was on the panel of jurors from which the trial jury had been selected, and had been in the same room with the jurors who were hearing the case for as long as two and a half days. That in essence was the factual reason which led to the decision and reversal [by] the Pennsylvania Supreme Court [in Commonwealth v. Stewart, 449 Pa. 50, 295 A.2d 303 (1972)1].
“Now, Mr. Stewart, and Mr. Yoffe, I, the trial Judge, have just been advised by the District Attorney that unbeknown to the District Attorney that same person, Fletcher Smith, the father of the victim of the killing, Dorothy Stewart, was sworn in on the first day of this Criminal Court Session as a tipstaff with the sworn duty of attending upon the jurors who were impanelled for this Term. As a consequence, up to a few minutes ago, Fletcher Smith throughout all of last week and today, has been exercising, as 1 say, his sworn duty of attending to the needs and care and so forth of the panel of jurors.
“What contact Fletcher Smith has had with any individual member of the jury, I could only speculate. What Fletcher Smith might have said to any jurors about this trial coming up, 1 can only speculate.
“That is the situation. I ask, Mr. Yoffee, do you have any motion to maket
“Mr. Yoffe: May I have a minute to consult with Mr. Stewart?
*462“The Court : Yes, sir.
“Me. Yoffe: Your Honor, I have discussed the matter to Mr. Stewart and he apparently understands his options and what can be done and what I can do as his attorney in presenting a motion to the Court pertaining to this matter and what his alternatives are if no motion is presented. After explaining those things, Mr. Stewart apparently understands, and he has indicated his desire to me that we make no motions at this time in response to the information that you have just given to us. Is that right, Mr. Stewart?
“Me. Stewaet: Yes, sir.
“Me. Yoffe: Did you understand what I said?
“Me. Stewaet: Yes, I did.
“Me. Yoffe: And you wish to proceed?
“Me. Stewaet: Yes.”2
This colloquy discloses that appellant was specifically informed by the court of the relevant circumstances and of its willingness to entertain a motion for a mistrial. After consultation with counsel, appellant was fully aware of his options. His counseled decision, clearly communicated to the judge, was not to move for a mistrial. He specifically requested that trial continue. Despite appellant’s voluntary and knowing refusal to make “any motion” and his articulated choice to proceed with the jury sworn, immediately the judge sua sponte declared a mistrial and ordered appellant “to be recommitted to incarceration.” Appellant’s trial was aborted at 3:56 p.m., barely nine minutes after the trial judge’s disclosure that Fletcher Smith “was sworn in on the first day of this Criminal Court Session as a tipstaff.” In doing so, the trial judge acted purely on conjecture; he said “I could only speculate” whether the victim’s father had contact with any of the jurors and “I can only speculate” what, if anything, might *463have been said “to any juror about this trial coming up.”
Appellant subsequently petitioned for a writ of habeas corpus. The petition alleged that, in light of the described circumstances, retrial would unconstitutionally place appellant twice in jeopardy. It was also asserted that Pennsylvania Rule of Criminal Procedure 1118(b), recently construed by this Court in Commonwealth v. Lauria, 450 Pa. 72, 297 A.2d 906 (1972), prohibited the trial judge’s sua sponte declaration of a mistrial. The trial judge denied the petition and ordered appellant to remain incarcerated without bail pending retrial.3
I.
Pennsylvania Rule of Criminal Procedure 1118(b) provides: “A motion to declare a mistrial shall be made when the prejudicial event is disclosed. In all cases only the defendant or the attorney for the defendant may move for a mistrial.” (Emphasis added.) In Commonwealth v. Lauria, 450 Pa. 72, 297 A.2d 906 (1972), this Court, in accordance with rule 1118(b), ordered the discharge of an accused whose trial, as here, had been aborted by a trial judge’s sua sponte declaration of a mistrial. Mr. Justice O’Brien there specifically stated: “The language of the rule is clear, and its obvious intendment is, inter alia, to remove from trial judges the power to declare mistrials sua sponte.” Id. at 75, 297 A.2d at 907. Today, the explicit language of rule 1118(b) and its “obvious intendment” are rejected absolutely.
The pragmatic soundness of rule 1118(b) and this Court’s decision in Lauria is readily apparent. If a defendant moves for a mistrial, and his motion is granted, retrial is permissible. See Commonwealth v. Wide-*464man, 453 Pa. 119, 306 A.2d 894 (1973). If the motion for a mistrial is improperly denied, the only consequence of the trial court’s error is a new trial, as was the result in this very case when it was last before us. See Commonwealth v. Stewart, 449 Pa. 50, 295 A.2d 303 (1972). And, as the plurality correctly notes, if a defendant fails to move for a mistrial, then he is foreclosed from raising that issue on appeal.
Only when the court acts on its own motion and declares a mistrial without manifest necessity, is re-prosecution barred. To avoid this unnecessary risk, our Court in rule 1118(b) denied trial judges the right to declare mistrials sua sponte. If the express language and “obvious intendment” of rule 1118(b) are followed, the problem of double jeopardy is obviated. The plurality, however, by taking the view of the dissenters in Lauria,4 recreated the very hazard of double jeopardy violations adherence to rule 1118(b) and Lauria avoids.
II.
It is only the plurality’s refusal to recognize the explicit command of rule 1118(b) which creates here a case of constitutional dimensions. We must therefore consider appellant’s fifth amendment claim. Specifically, it must be determined whether the constitutional proscription against double jeopardy will be violated if, in the particular circumstances of this case, appellant must again stand trial. Here, the trial judge, in the. absence of appellant’s request or consent and solely *465on the basis of Ms stated speculation, sua sponte declared a mistrial.
Reprosecution is impermissible “if a mistrial is declared without ‘manifest necessity’ or without the defendant’s request or consent . . . .” Commonwealth v. Wideman, 453 Pa. 119, 122, 306 A.2d 894, 895 (1973). See, e.g., United States v. Jorn, 400 U.S. 470, 91 S. Ct. 547 (1971) ; United States v. Perez, 22 U.S. (9 Wheat.) 579 (1824); Commonwealth v. Brown, 451 Pa. 395, 301 A.2d 876 (1973); Commonwealth v. Lauria, 450 Pa. 72, 297 A.2d 906 (1972); Commonwealth v. Shaffer, 447 Pa. 91, 288 A.2d 727, cert. denied, 409 U.S. 867, 93 S. Ct. 164 (1972); Commonwealth v. Ferguson, 446 Pa. 24, 285 A.2d 189 (1971). Once the jury is sworn, jeopardy attaches.5 Once jeopardy has attached, the Constitution guarantees an accused the “valued right to have his trial completed by [that] particular tribunal . . . .” Wade v. Hunter, 336 U.S. 684, 689, 69 S. Ct. 834, 837 (1949).
Appellant did not request a mistrial; neither did he consent to it. To the contrary, he specifically rejected the court’s invitation to move for a mistrial and instead decided to proceed with the jury sworn. The Commonwealth argues, however, and the plurality evidently agrees, that the trial judge’s sua sponte declaration of the mistrial was proper because of manifest necessity.
Although the United States Supreme Court has not announced inflexible rules defining what circumstances constitute manifest necessity, that Court “has always recognized that trial judge’s may declare a mistrial without barring reprosecution only in extraordinary *466circumstances.” United States ex rel. Russo v. Superior Court, supra at 13 (emphasis added). Moreover, the Supreme Court has consistently held that these extraordinary circumstances must be factually demonstrated. In other words, there must be a necessity, and that necessity must be manifest. The present record fails to establish necessity — manifest or otherwise.
Conjecture and speculation — the basis for the decisions by both the trial judge and the plurality, are constitutionally incapable of supporting a conclusion of manifest necessity. The plurality in its speculation accepts, without factual basis, the trial judge’s assumption that Fletcher Smith, a sworn court officer, violated his oath by illegally seeking, in a court setting, to influence jurors called to try this case. Faced with this record, the plurality steps into the unknown and guesses that the tipstaff’s presence might have infected the jury with prejudice against appellant.
It was Frederick Stewart who had the right to be protected from prejudice. Yet Frederick Stewart, fully informed by the court and advised by his trial lawyer, knowingly declined the court’s invitation to move for a mistrial. Instead, appellant decided to continue with the jurors sworn to try his case. By this counseled decision, appellant rejected any notion of prejudice. Where, then, is there any ground for aborting the trial?
This Court previously rejected the notion that manifest necessity may be based upon a trial judge’s speculative impression of possible prejudice. Commonwealth v. Shaffer, 447 Pa. 91, 288 A.2d 727, cert. denied, 409 U.S. 867, 93 S. Ct. 164 (1972). All other courts which have ruled on this issue similarly have concluded that imagined possible prejudice is constitutionally insufficient to sustain a conclusion of manifest necessity. See, e.g., United States v. Walden, 448 F.2d 925 (4th Cir. 1971), modified on other grounds, 464 F.2d 1015 (4th Cir.), cert. denied, 409 U.S. 867, 93 S. Ct. 165 (1972); *467United States v. Burdick, 284 F. Supp. 685 (E.D. Pa. 1968) ; People v. Compton, 6 Cal. 3d. 55, 490 P.2d 537, 98 Cal. Rptr. 217 (1971); Ferlito v. Judges of the County Court, 31 N.Y.2d 416, 292 N.E.2d 779, 340 N.Y. S.2d 635 (1972); cf. Brindle v. State, 125 Ga. App. 298, 187 S.E.2d 310 (1972).
Beeently, the New York Court of Appeals held: “The Judge’s subjective appraisal of some remote possibility of bias was completely without the ambit of the well-established rule that ‘manifest necessity’ must be shown in justification of a mistrial . . . .” Ferlito v. Judges of the County Court, supra at 419, 292 N.E.2d at 780, 340 N.Y.S.2d at 637.
Here, the trial judge twice acknowledged that he “could only speculate” as to possible prejudice. Unresponsive to these well-considered precedents, the plurality errs, as did the trial judge, in venturing into the realm of conjecture to seek prejudice where none was shown.
In Commonwealth v. Shaffer, supra, the trial judge declared a mistrial upon speculation that the jury had overheard a possibly prejudicial remark. As here, counsel opposed the declaration of mistrial and waived any possible prejudice. Despite counsel’s objection, the court nevertheless declared a mistrial on its own motion. This Court unanimously held that reprosecution was barred by the double jeopardy clause of the fifth amendment. In my view, Shaffer controls this case. Only if Shaffer is overruled can its precedential force compelling reversal here be denied.
The plurality attempts to distinguish Shaff&r on the shaky ground that there the mistrial occurred near the end of trial, while here the mistrial was declared near the beginning. The Constitution neither makes nor permits such a distinction. The plurality’s theory appears to be the first attempt by this Court or any court to apply the double jeopardy clause only to the last half *468of a trial. Once a defendant is in jeopardy — and appellant here definitely was — it is irrelevant at what stage of the trial thereafter a mistrial is erroneously declared. Limiting the double jeopardy guarantee to only the last half of the trial is in effect to afford the accused only half of his constitutional guarantee. The plurality’s attempt to distinguish Shaffer renders the “in jeopardy” guarantee meaningless — or at most only half meaningful.
The plurality, however, endeavors to justify its conclusion on the theory that the trial court is vested with extraordinarily broad discretion to determine manifest necessity, and that this Court’s scope of review of that determination is a limited one. I cannot agree. First, manifest necessity “is a mixed question of fact and law which [appellate courts] can freely review.” United States ex rel. Russo v. Superior Court, supra at 15. Second, the plurality, presented with a record barren of a showing of judicial discretion, mistakenly concludes that the trial judge did not abuse his discretion. Where there is no exercise of judicial discretion, how is a conclusion warranted that there was no abuse of “discretion?”
Unfortunately, the plurality fails to recognize that the “doctrine of manifest necessity stands as a command to trial judges not to foreclose the defendant’s option [to proceed to verdict] until a scrupulous exercise of judicial discretion leads to the conclusion that the ends of public justice would not be served by a continuation of the proceedings.” United States v. Jorn, 400 U.S. 470, 485, 91 S. Ct. 547, 557 (1971). This record does not reveal such a scrupulous exercise. Indeed, the critical nine minutes disclose no exercise of judicial discretion.
The plurality equates “a scrupulous exercise of judicial discretion” with a ruling prompted by pure speculation. This equation does not balance, and I cannot accept the plurality’s erroneous constitutional calculus.
*469Only recently, the United States Court of Appeals for the Third Circuit, in explaining the phrase “scrupulous exercise of judicial discretion,” declared with unquestioned clarity that the trial judge has “a duty to exhaust all other reasonable possibilities [short of trial abortion] before deciding to foreclose [a] defendant[’s] option to proceed .... The scrupulous exercise of that discretion means that he must seek out and consider all avenues of cure to avoid trial abortion.” United States v. Tinney, 473 F.2d 1085, 1089 (3d Cir.), cert. denied, 412 U.S. 928, 93 S. Ct. 2752 (1973) (quoting United States v. Walden, 448 F.2d 925, 929 (4th Cir. 1971), modified on other grounds, 464 F.2d 1015 (4th Cir.), cert. denied, 409 U.S. 867, 93 S. Ct. 165 (1972)). The Fifth Circuit has similarly held that a trial judge must “make a painstaking examination of all the facts and circumstances .... Only after such a careful investigation can a trial judge properly exercise his discretion ____” McNeal v. Hollowell, 481 F.2d 1145, 1152-53 (5th Cir. 1973), cert. denied, 415 U.S. 951, 94 S. Ct. 1476 (1974). Indeed, “[t]he manifest necessity doctrine . . . demands a thorough inquisition by the trial judge into all the facts and a painstaking consideration of all possible cures short of trial abortion.” United States v. Walden, supra at 930. The Constitution requires at the very least that the trial judge “consider alternatives to declaring a mistrial.” United States v. Cheung, 485 F.2d 689, 691 (5th Cir. 1973).
Where, it must be asked, does this particular record show exhaustion of “all other reasonable possibilities?” Did the trial court “seek out and consider all avenues oí cure?” Where was the necessary “painstaking examination” and “careful investigation?” The record surely does not disclose the constitutionally-required inquiry or consideration of alternatives.6
*470The record reveals only that the trial judge, as in <Torn, “acted so abruptly in discharging the jury that, had the prosecutor been disposed to suggest [an alternative], or the defendant to object to the discharge of the jury, there would have been no opportunity to do so. When one examines the circumstances surrounding the discharge of this jury, it seems abundantly apparent that the trial judge made no effort to exercise a sound discretion to assure that . . . there was a manifest necessity for the sua, sponte declaration of this mistrial.” United States v. Jorn, supra at 487, 91 S. Ct. at 558.
III.
Appellant is entitled to relief on at least two grounds — procedural violation of rule 1118(b) and the trial judge’s abuse of discretion in imagining manifest necessity. However, this case could be disposed of on another basis only tangentially discussed by the plurality. The plurality dismisses as insignificant the critically important facts that appellant refused to move for a mistrial and affirmatively requested that the trial continue. At that juncture, the trial judge was precluded from aborting the trial.
At trial appellant and his counsel deliberately declined to move for a mistrial. Instead, appellant created a positive record establishing his satisfaction with the jury selected. He never even suggested the existence of a prejudicial event. Appellant’s trial decision not to request a mistrial, even at the court’s invitation, is an unequivocal admission of the nonexistence of prejudice. Here, as in People v. Boyd, 22 Cal. App. *4713d 714, 719, 99 Cal. Rptr. 553, 556 (1972), “[t]lie defendant was . . . entitled to a trial before an unprejudiced jury. He was offered [a] new trial and refused it. This refusal . . . could be viewed as tantamount to a concession by defendant and Ms counsel that the . . . actions were not prejudicial.” See also Goodman v. United States, 273 F.2d 853, 860 (8th Cir. 1960).
The plurality correctly recognizes that this purposeful refusal to interpose a timely motion when the possible defect was suggested by the trial court insulates that “defect” from appellate review. While reciting this principle, the plurality nevertheless concludes that appellant’s course of action “does not necessarily give rise to the . . . proposition that in taldng affirmative action the trial court erred.” The simple reply is that after appellant waived this possible defect in his trial, no “necessity,” much less a manifest necessity, existed.
For this reason, the plurality’s reliance on Illinois v. Somerville, 410 U.S. 458, 93 S. Ct. 1066 (1973), is entirely misplaced. The plurality excises the words “ends of public justice” from that opinion and believes the incantation of these words can magically heal the constitutional wound inflicted upon appellant. Concededly, the Somerville Court relied on an “ends of public justice” notion, but not in the sense that the plurality uses that phrase. We must be mindful of the caveat in Somerville that “divorcing the language from the facts of [a] case serves only to distort its holdings.” Id. at 469, 93 S. Ct. at 1073. Unfortunately the plurality severs the “ends of public justice” from the facts of Somerville.
Somerville specifically involved a formal defect in an indictment which “could not be waived by the defendant’s failure to object, and could be asserted on appeal or in a post-conviction proceeding to overturn a final judgment of conviction.” Id. at 460, 93 S. Ct. at *4721068. Given these facts, the Supreme Court explained the limited circumstances when a mistrial could be declared in the “ends of public justice.” “If an error would make reversal on appeal a certainty, it would not serve ‘the ends of public justice’ to require that the Government proceed with its proof when, if it succeeded before the jury, it would automatically be stripped of that success by an appellate court.” Id. at 464, 93 S. Ct. at 1070.
We are here dealing with a non-Somerville defect in the proceedings — a speculative one — a defect, if any, that not only could be waived at trial, but which, as the plurality correctly states, was actually waived by appellant.7 Since an accused can knowingly and intelligently waive any constitutional right,8 there is no *473reason why this appellant could not waive the opportunity to move for a mistrial that the trial judge was offering.
It is unquestioned that in this Commonwealth strategic and tactical decisions during trial are for counsel. Commonwealth v. McGrogan, 449 Pa. 584, 297 A.2d 456 (1972).9 This Court recently said in another context, “the litigant is the complete master of his own cause of action in matters of substance; he may press it to the very end regardless of the facts and law arrayed against him.” Archbishop v. Karlah, 450 Pa. 535, 539, 299 A.2d 294, 296 (1973).
The controlling fact here is that appellant, acting upon the advice of the same attorney who at his 1961 trial properly requested a mistrial when he believed that appellant’s jury was prejudiced, did in this trial make a voluntary and knowing decision to refuse to move for a mistrial. At appellant’s earlier trial, the decision to move for a mistrial was entirely sound. On appeal, that trial decision was vindicated by this Court. Commonwealth v. Stewart, 449 Pa. 50, 295 A.2d 303 (1972). There is nothing to suggest that counsel’s advice to refuse to move for a mistrial reflected anything but trial advocacy of the highest quality. Here appel*474lant evidenced Ms counseled choice to continue with trial by definitely refusing to move for a mistrial.
Appellant’s positive waiver was sufficient to preclude the trial judge from imposing Ms sua sponte mistrial. This waiver conclusively established appellant’s right to proceed with the trial.
To overcome appellant’s specific waiver, the plurality creates a new and unprecedented use for the “ends of public justice.” The rule now announced is that whenever a trial judge disagrees with the defense’s studied strategy, the “ends of public justice” allow the judge to declare a mistrial and thereby substitute his own conception of sound trial strategy for that of the defendant and his counsel. Thus the trial judge is assigned a novel role, that of supercounsel for the defense.
To permit a trial judge in these particular circumstances to do more than invite a motion from counsel is to sanction unwarranted judicial intrusion into the attorney-client relationship and into the right of the defense to decide trial strategy and to conduct its case. See Brooks v. Tennessee, 406 U.S. 605, 92 S. Ct. 1891 (1972).10 Appellant’s counseled choice was to continue *475with trial. His “desire to proceed and have the question of guilt or innocence finally resolved by the jury then impanelled must be respected . . . .” Commonwealth v. Shaffer, supra at 101, 288 A.2d at 733.
IV.
What this record makes clear cannot be refuted. The record substantiates that the trial judge erroneously intruded upon the conduct of a counseled defense and failed to consider “the importance to the defendant of being able, once and for all, to conclude his confrontation with society through the verdict of a tribunal he might believe to be favorably disposed to his fate.” United States v. Jorn, supra at 486, 91 S. Ct. at 558.
The particular circumstances of this case in no way permit subjecting appellant to a third prosecution for the same offense in violation of the double jeopardy guarantee. “[T]his record shows nothing to take appellant's] claims outside the classic mold of being twice placed in jeopardy for the same offense.” United States v. Jorn, supra at 488, 91 S. Ct. at 558 (Burger, C. J., concurring).
Appellant is entitled to the relief guaranteed by the double jeopardy clause of the fifth amendment.
Mr. Justice Manderino joins in this dissenting opinion.More accurately, it was tlie court’s refusal to grant the defendant’s timely motion for a mistrial upon that disclosure which required this Court to reverse the conviction and grant a new trial.
Emphasis added.
Commonwealth v. Stewart, 95 Dauphin County Rptr. 375 (Pa. C.P. 1973).
The plurality declares, “The trial court still has the inherent power under appropriate circumstances and in the interests of justice to declare a mistrial . . . .” This formulation is precisely the one advanced by the dissenters in Lauria, where they stated, “[T]his rule [1118(b)] does not and should not deprive a judge of his inherent power under appropriate circumstances and in the interest of justice to declare a mistrial.” Commonwealth v. Lauria, 450 Pa. 72, 77, 297 A.2d 906, 908 (1972) (dissenting opinion).
Commonwealth v. Almeida, 362 Pa. 598, 68 A.2d 595 (1949), cert. denied, 339 U.S. 924, 70 S. Ct. 614 (1950) ; Commonwealth v. Curry, 287 Pa. 553, 135 A. 316 (1926) ; Commonwealth v. Fitzpatrick, 121 Pa. 109, 15 A. 466 (1888) ; Alexander v. Commonwealth, 105 Pa. 1 (1884) ; McFadden v. Commonwealth, 23 Pa. 12 (1853).
Clearly, the opportunity for a proper exercise of discretion existed. If the judge entertained doubts whether the tipstaff had *470violated bis oath, tile judge could, for example, have questioned Fletcher Smith under oath. If the judge still harbored doubts about possible jury taint, he could have questioned the jurors under oath, and determined whether the tipstaff had improperly communicated with them.
The Somerville requirement that reversal be “a certainty” cannot be overemphasized. It has recently been observed that “a reasonable apprehension that a trial is flawed sufficiently to result in reversal and retrial is not sufficient ‘manifest necessity’ to justify trial abortion.” United States v. Walden, 448 F.2d 925, 930 (4th Cir. 1971), modified on other grounds, 464 F.2d 1015 (4th Cir.), cert. denied, 409 U.S. 867, 93 S. Ct. 165 (1972). If a reasonable apprehension is insufficient, then it can hardly be concluded, as the plurality evidently does, that the total absence of any possibility for reversal constitutes manifest necessity.
See, e.g., Commonwealth v. Phillips, 208 Pa. Superior Ct. 121, 220 A.2d 345 (1966), aff’d, 424 Pa. 641, 226 A.2d 863, cert. denied, 387 U.S. 946, 87 S. Ct. 2084 (1967) (grand jury indictment) ; Pa. R. Crim. P. 215(a) (same) ; United States v. Banks, 370 F.2d 141 (4th Cir. 1966), cert. denied, 386 U.S. 997, 87 S. Ct. 1317 (1967) (speedy trial) ; Aeby v. United States, 255 F.2d 847 (5th Cir. 1958) (jury trial) ; Commonwealth v. Garrett, 439 Pa. 58, 266 A.2d 82 (1970) (same) ; Pa. E. Crim. P. 1101 (same) ; Pa. E. Crim. P. 1103 (trial by less than 12 jurors) ; Johnson v. Zerbst, 304 U.S. 458, 58 S. Ct. 1019 (1938) (counsel) ; Commonwealth v. Ritchey, 431 Pa. 269, 245 A.2d 446 (1968) (same) ; Miranda v. Arizona, 384 U.S. 436, 86 S. Ct. 1602 (1966) (counsel during interrogation) ; Burgess v. King, 130 F.2d 761 (8th Cir. 1942) (confrontation of witnesses) ; Commonwealth v. Potrillo, 340 Pa. 33, 16 A.2d 50 *473(1940) (same). Cf. Commonwealth v. McGrogan, 449 Pa. 584, 588 nn. 8-12, 297 A.2d 456, 458 nn. 8-12 (1972). See generally Sandalow, Henry v. Mississippi and the Adequate State Ground: Proposals for a Revised Doctrine, 1965 Sup. Ct. Rev. 187; Comment, Oriminal Waiver: The Requirements of Personal Participation, Competence and Legitimate State Interest, 54 Calif. L. Rev. 1262 (1966).
Indeed, it is the primary duty of defense counsel to pursue zealously his client’s best interests. This is fundamental to our adversary system of criminal justice. See Anders v. California, 386 U.S. 738, 87 S. Ct. 1396 (1967) ; Powell v. Alabama, 287 U.S. 45, 53 S. Ct. 55 (1932) ; Suggs v. United States, 391 F.2d 971 (D.C. Cir. 1968) ; Commonwealth v. Jones, 451 Pa. 69, 301 A.2d 811 (1973) ; ABA Code of Professional Responsibility, Canon 7 (1969).
In Brooks v. Tennessee, 406 U.S. 605, 92 S. Ct. 1891 (1972), the Supreme Court held unconstitutional a Tennessee statute requiring that an accused “ ‘desiring to testify shaU do so before any other testimony for the defense is heard by the court trying the case.’ ” Id. at 606, 92 S. Ct. at 1892 (quoting Tenn. Code Ann. § 40-2403 (1955)). This statute, which “restrict[ed] the defense— particularly counsel — in the planning of its case,” and “thereby deprived [the accused] of the ‘guiding hand of counsel,’ ” was held violative of due process. Id. at 612-13, 92 S. Ct. at 1895. Here, in addition to offending the double jeopardy guarantee, the trial judge’s sua sponte declaration of a mistrial, like the statute in Broohs, must be viewed as an infringement on appellant’s right to due process because the court’s disregard of trial counsel's considered decision not to move for a mistrial interfered with appellant’s constitutional guarantee of effective assistance of counsel. *475See United States ex rel. Carey v. Rundle, 409 F.2d 1210, 1215 (3d Cir. 1969), cert. denied, 397 U.S. 946, 90 S. Ct. 964 (1970).