On September 16, 2008, following an evidentiary hearing in the Juvenile Branch of the Family Court, T.C., then aged 17, was found involved in two counts of armed robbery,1 one count of carrying a pistol without a license (CPWOL),2 and one count of possession of a firearm during the commission of crime of violence (PFCV).3 T.C. was found not involved with respect to one count of possession of a prohibited weapon (PPW (b))4 and one count of unlawful possession of ammunition.5 T.C. was placed on probation for one year.
On appeal, T.C. claims that the evidence was insufficient as a matter of law to prove that he was the person who committed the charged offenses, that the trial judge’s conduct of the evidentiary hearing was not impartial, and that several of the judge’s other rulings constituted reversible error. In our view, there was at least one significant discrepancy in the evidence, which T.C.’s counsel and the judge both failed to detect, and which made the question of guilt or innocence somewhat closer than it would otherwise be. In addition, the judge erred in several of her evidentiary rulings, and although we are confident that she did her best to be fair and to discern the truth, she took an unusually active part in the questioning of defense (but not government) witnesses. Under the circumstances, in our view, the judge might appropriately have paid greater attention to preserving the appearance of impartiality. Nevertheless, we discern no reversible error. Accordingly, we affirm.
I.
THE TRIAL COURT PROCEEDINGS
At about 10:00 p.m. on July 2, 2008, Vincent Cartwright and Kevin Amato were robbed at gunpoint by two youths who appeared to be in their teens. The robbers took a bank card and keys from Cartwright and three crisp twenty dollar bills from Amato. Amato had obtained the three twenty dollar bills from an Automatic Teller Machine (ATM) a short time before the robbery.
The robbers fled down an alley, and one of the victims called the police on his cell phone. Officers arrived within a few minutes, and the victims provided reasonably detailed descriptions of the two robbers. Soon thereafter, police detained five young men as possible suspects. One of those detained was T.C.
At a show-up conducted approximately twenty-five minutes after the robbery, both Cartwright and Amato positively identified T.C. as one of the youths who had robbed them. Specifically, they stated that he was the gunman, and that the gunman’s confederate had been wearing a mask. T.C. had three fresh twenty dollar bills in his possession. No other fruits of the robbery were recovered from T.C. or found in the surrounding area, and the handgun used in the robbery was never found.
*76Three of T.C.’s Mends, as well as T.C. himself, testified for the defense. According to the defense witnesses, T.C. was not and could not have been the robber. All four young men stated that they and a number of their friends had been playing basketball for several hours at a nearby school. A short time before they left, they saw two other young men running past the scene. Thereafter, police arrived, and the young men who had been playing basketball scattered in different directions. Essentially, T.C.’s friends claimed to have been in his presence until shortly before his arrest, thus providing the basis for an alibi defense.
T.C.’s father, the Program Manager for Intake at the District’s Child and Family Services Administration (CFSA), also testified for the defense. The father stated that on July 1, 2008 — the day before the robbery — T.C. had withdrawn $143.006 from his summer youth employment account at the Chevy Chase Bank. The father further asserted that after T.C.’s arrest, he (the father) had found $80.00 in T.C.’s dresser drawer.7 In response to a question from the court, the father acknowledged that he had not personally observed his son make the withdrawal, but he stated that T.C.’s mother had told him that T.C. had done so. The trial judge immediately sustained her own objection to this testimony as hearsay. T.C. testified in his own behalf, denied any involvement in the robbery, and stated that he had indeed withdrawn approximately $140.00 from an ATM on July 1, and that he had taken $60.00 with him the following day, leaving the rest of the money in a drawer.
The judge, who had interrogated the young defense witnesses in some detail, did not credit their testimony, and she ruled, inter alia, as follows:
Now the court heard from the respondent’s friends, C.S., J.R. and Ronald Wright, and the court also heard from T.C. And if the court were to believe their testimony, the court would have to believe that they were playing basketball from 5:30 until 10:00, that they were wearing jeans, playing basketball with no basketball, in the dark, and played basketball after they smoked marijuana.
Mr. Wright said that they had played basketball for four to five hours, they then smoked marijuana and then played basketball again, which seems unlikely. The testimony is contradicted by Officer Small,[8] who said that there was no basketball, and the court was dark, and that there was no sporting equipment on the scene, and that he had in fact searched the area.
We have two eyewitnesses who identi-fi[ed] the respondent, based not just on clothing but also his facial features and his hair, his wristbands and that the respondent was stopped in a short time and within a short distance of the robbery, following the same path of flight identified by Mr. Amato and Mr. Cartwright.
*77On this evidence, the court finds beyond a reasonable doubt that the respondent took the property that was of value from the two complaining witnesses, that he did so from their immediate actual possession. That he used force and violence to take their property. That he carried the property away without a right to it with the specific intent to steal it. And that at the time he took the property, he had a weapon.
Presumably as a result of her ruling excluding the bank record, the judge made no mention of the testimony of T.C.’s father or of the defense’s innocent explanation of the presence of the three twenty dollar bills in T.C.’s pocket, namely, his claimed ATM withdrawal of the previous day. The judge found T.C. involved in armed robbery, PFCV, and related weapons offenses. On October 21, 2008, the judge placed T.C. on juvenile probation for one year. This appeal followed.
II.
EVIDENTIARY SUFFICIENCY
T.C. claims on appeal that the evidence against him was insufficient as a matter of law. We disagree.
In assessing claims of evidentia-ry insufficiency, we view the record in the light most favorable to the District, and we “give full weight to the right of the judge, as the trier of fact, to determine credibility, weigh the evidence, and draw reasonable inferences.” Poulnot v. District of Columbia, 608 A.2d 134, 137 (D.C.1992); see also In re R.H.M., 630 A.2d 705, 707 (D.C.1993). Although we have recognized that, depending on the circumstances, eyewitness identification of strangers can be unreliable, see e.g., Benn v. United States, 978 A.2d 1257, 1265 (D.C.2009) (Benn II); Webster v. United States, 623 A.2d 1198, 1204 n. 15 (D.C.1993),9 that is a consideration that must be evaluated by the trier of fact. Even “the testimony of a single eyewitness can be sufficient to support a conviction so long as a reasonable person could find the identification convincing beyond a reasonable doubt.” Benn II, 978 A.2d at 1265 (quoting Peterson v. United States, 657 A.2d 756, 760 (D.C.1995)) (internal quotation marks omitted).
In this case, positive identifications were made by two witnesses10 at a show-up held some twenty-five minutes after the robbery. Although such “show-ups” necessarily involve a measure of suggestivity, we have also recognized their utility and reliability. See, e.g., United States v. Hunter, 692 A.2d 1370, 1376 (D.C.1997). Cartwright testified that he recognized T.C. not only by his facial features and dreadlocks, but also because “he was wearing the same wristbands that the person who robbed us did.” Amato stated that he identified T.C. on the basis of his dreadlocks and facial features, and like Cartwright, he professed to have no doubt about the accuracy of his identification.
Aside from the identifications, the District relied heavily on the evidence that police found three apparently brand new twenty dollar bills on T.C.’s person, and that shortly before the robbery, Amato *78had obtained three such bills “from the 711 ATM up the block.” In most instances, and perhaps in this case, such evidence should, to use the vernacular, “seal the deal.” It would surely be a remarkable and improbable coincidence if Amato had been robbed of three brand new twenty dollar bills and if a short time later, a young man identified by the victims as the robber had in his possession three different brand new twenty dollar bills. “Coincidences happen, but an alternative explanation not predicated on happenstance is often the one that has the ring of truth.” Poulnot, 608 A.2d at 139.
In this ease, however, there is an unusual quirk. Both complainants identified T.C. as the gunman, and they agreed that T.C.’s fellow-robber was wearing a mask. Cartwright testified that Amato gave the three twenty dollar bills to the masked accomplice, not to the gunman, and he expressed no doubt on that subject. Cartwright stated:
[M]y friend then showed his wallet, to show that there was nothing in it. Then he emptied the other pocket and there was $60 that the other person had taken from him, that my friend, Kevin, had handed the $60 to the other person.
Q Did you actually see that occur?
A Yes.
Q Could you see how the, the denominations rather, of the $60?
A Yeah, they were in $20 bills, and they were brand new, we had just gone to 7-Eleven and they were brand new, just taken out of the ATM.
(Emphasis added.)
Amato, on the other hand, believed that he had handed over the bills to the gunman, and not to the accomplice. Amato’s recollection was, however, far less positive than Cartwright’s:
Q Where did you have that money?
A It was in my left pocket.
Q As you took [it] out, do you remember who[m] you gave it to?
A I believe it was the man with the gun, but I put my head like to the ground because I was, to be honest, was very upset that this all was going down and I was getting my money taken and there was a gun pointed at my friend. It was like [a] very emotional state.
It does not appear that counsel for either party11 or, for that matter, the judge, recognized that if Cartwright, the complainant who appeared certain of his recollection, was to be believed, then all three bills were surrendered to the masked accomplice, but they were recovered from the young man who was identified by the victims as the robber with the handgun. In her oral findings, the judge, who had evidently taken copious notes, and who recited the evidence in considerable detail, specifically mentioned Amato’s statement that he “gave that [money] to the man with the gun.” The judge made no reference at all, however, to Cartwright’s testimony that he had seen Amato give the bills to the masked robber and not to the gunman.
That the money was found on the alleged gunman does not, of course, establish that T.C. was innocent. Amato, though obviously uncertain, may have been right about which robber received the bills; Cartwright, who expressed no doubt, may nevertheless have been wrong. Moreover, even if the accomplice was the person who first obtained the bills in question, he may subsequently have turned them all over to the gunman (or, there being no honor among thieves, the gunman might even *79have robbed his masked confederate). Viewing the evidence in the light most favorable to the District, we cannot say, given the identifications and the other evidence, that the judge, as the trier of fact, clearly erred in finding beyond a reasonable doubt that T.C. was involved. We are therefore constrained to reject T.C.’s claim of evidentiary insufficiency.
Nevertheless, the issue is troubling. As we have noted, the police did not find any other fruits of the robbery on or near T.C., and the weapon with which the crime was carried out was never recovered. The alternative explanation for T.C.’s possession of the bills offered by the defense — that the three new twenty dollar bills were a part of T.C.’s ATM withdrawal on the previous day — becomes more plausible in light of the apparent discrepancy in the District’s case. Although we do not believe that the uncertainty as to which robber received Amato’s money, or the failure of the court and counsel to detect this uncertainty, renders the evidence legally insufficient, it implicates T.C.’s claim that the judge inappropriately injected herself into the defense ease by aggressively interrogating the defense witnesses while making no attempt to explore any possible weakness in the District’s evidence.
III.
T.C.’s CLAIM OF JUDICIAL PARTIALITY
T.C. contends that at the eviden-tiary hearing, “the court failed to maintain its role as a neutral judge.” He asserts that the judge “extensively, unnecessarily, and disparagingly questioned only the witnesses for the defense.”12 T.C.’s claim is not without some support in the record,13 *80but we do not believe that it warrants reversal.
During the presentation of the District’s case, the judge posed only a single question to one witness for the government, and no questions at all to any of the others. Specifically, she asked Amato whether he had seen the people who were presented to Cartwright during the show-up.14 Although there were potential weaknesses in the District’s case, including the failure of the police to recover the weapon or any of the property taken from the victims (except the three twenty dollar bills), as well as the (unnoticed) discrepancy as to which robber received those bills, the judge left the questioning of the District’s witnesses almost entirely to the attorneys for the parties.
By contrast, the judge questioned at length, and with considerable asperity, the defense witnesses who claimed to have played basketball with T.C. and who attempted to provide him with an alibi. Indeed, the court’s examination of these witnesses covers the same number of pages of the transcript as their cross-examination by the District’s counsel. In the case of the last of these witnesses, Ronald Wright, the transcript contains four pages of examination by the Assistant Attorney General, but six and one-half pages of questioning by the judge.
The tone and manner of the judge’s interrogation were sometimes openly incredulous. In fact, the judge appeared on several occasions to be attempting to extract an admission, or to expose a contradiction, rather than to elicit information or clarify the evidence. The judge obviously disbelieved the testimony that the group of young men, some of them comparatively warmly dressed, had spent several hours playing basketball on a hot July day, and much of her questioning was addressed to this subject and to details incidental to it.
The first of these defense witnesses was C.S. After this young man had been examined by T.C.’s attorney and cross-examined by counsel for the District, the following dialogue ensued:
The Court: Wait just one second. You can retake the stand. What was T.C. wearing?
The Witness: To my knowledge, I remember him wearing a blue shirt with a blue visor and he had a blue skull cap on with some, I think, they were Two Park shoes, and he had on some jeans, yeah, I think some gray jeans or gray shorts.
The Court: Jeans with what?
The Witness: I think they were gray jeans or gray shorts.
The Court: And this was in July?
The Witness: Yes, ma’am.
The Court: And you had been playing basketball for four hours?
*81The Witness: Yes ma’am.
The Court: And you were wearing long jeans or short jeans?
The Witness: Me?
The Court: Uh-huh.
The Witness: I had on jeans, long jeans. When C.S. stated that “most of the people had on shorts,” the judge returned to the previous subject of her questioning, with further skeptical interrogation:
The Court: And how long did you play basketball?
The Witness: I know it was some hours, but I’m not sure like the exact time.
The Court: Some hours?
The Witness: Yes, ma’am.
The Court: More than two hours?
The Witness: Yes, ma’am.
The Court: And you played in July, in the District of Columbia, basketball for two hours in long jeans?
The Witness: I wouldn’t say exactly two hours, but yes.
The next defense witness was J.R. While questioning this witness, the judge was again openly skeptical of the claim that the group played basketball for hours in the heat, and she then pounced on what on what she evidently believed to be a contradiction, albeit on a collateral point, regarding the precise color of the skin of one of the players:
The Court: And Ronald [Wright] had been playing basketball with you for five hours, too?
The Witness: Yes, ma’am.
The Court: And you don’t remember what Ronald was wearing?
The Witness: No, ma’am.
The Court: What does Ronald look like?
The Witness: He’s light skinned, a little bit taller than me.
The Court: Taller than who?
The Witness: He’s a little taller than me.
The Court: Uh-huh.
The Witness: And brown skin[ned].
The Court: He’s light skinned and brown skinned?
The Witness: No, he’s brown skinned.
The Court: You just said he was light skinned.
The Witness: I meant to say he was brown skinned.
After inquiring about Ronald’s height, the judge finished with a rhetorical question which emphasized the perceived inconsistency:
The Court: So he’s taller than 5'11," he’s light skinned and brown skinned?
The Witness: He’s brown skinned.
As we have previously noted, the judge interrogated the third young defense witness, Ronald Wright, at some length. Wright had been with T.C. when the young men were stopped by the police, and the judge inquired why he was out of breath at the time:
The Court: Now, how far had you run when the police stopped you?
The Witness: Excuse me, give me a minute, I’m trying to think. The block isn’t very long, I say, we ran about 100 to 200 feet away from the court, up towards Jackson.
The Court: How many blocks did you run or did you run—
The Witness: We didn’t run any blocks at all, it was less than a block. It was less than the street.
The Court: You ran less than one block?
The Witness: Way less.
The Court: Ran way less than one block.
The Witness: Yes ma’am.
*82The Court: You ran way less than a block and you were out of breath?
The Witness: We were already playing basketball previously, we had just stopped.
The Court: And you had stopped and rested, right?
The Witness: No, we had stopped and rested and continued playing.
The Court: Yes, you stopped and rested, you smoked marijuana.
The Witness: Yes.
After posing several other questions in which she repeated three times that Wright had smoked marijuana, the judge returned to Wright’s explanation of why he was out of breath:
The Court: So you rested for five to seven minutes?
The Witness: Uh-huh.
The Court: Yes or no.
The Witness: Yes.
The Court: And then what did you do?
The Witness: Then we proceeded to walk off the court.
The Court: Uh-huh.
The Witness: And I turned to my right, saw the police coming out of the alleyway with their lights on.
The Court: So you’ve been resting from five to seven minutes—
The Witness: Yes ma’am.
The Court: — then you ran for way less than one block, and you were out of breath?
The Witness: Yes ma’am.
Thus, and not without considerable skill, the judge exposed the contradictory character, and even the apparent absurdity, of Wright’s explanation.
In sum, the style of some of the judge’s interrogation of the defense witnesses15 was that of a cross-examiner apparently seeking to compel the witness to acknowledge that his testimony was inconsistent or contrary to common sense, and thus untrue. Such questioning would have been perfectly appropriate if it had come from opposing counsel, but in this case, interrogation that often resembled partisan cross-examination was conducted by the judge, with the questioning directed to defense witnesses only.
We do not suggest by any means that a judge’s posing of questions to witnesses is always inappropriate. On the contrary, as an illustrious British statesman wrote more than two centuries ago,
[a] judge is not placed in that high situation merely as a passive instrument of parties. He has a duty of his own, independent of them, and that duty is to investigate the truth.
Edmund BuRke, Report of the Committee on Warren Hastings’ Trial, 31 Parl. Hist. 348 (1794), quoted at IX Wigmore on Evidence § 2484, at 277 (1981); see also Bowman v. Roycel’s Rental, Inc., 110 Daily Wash. L. Rptr. 2757 (Super.Ct.D.C. October 28, 1982) (quoting BuRke and Wig-more). To be sure, this duty “to investigate the truth,” if it exists at all under current law, does not vest the judge with authority to make an ex parte inquiry outside the courtroom, even in order to determine whether perjury has been committed at the very trial over which the judge is presiding. Davis v. United States, 567 A.2d 36, 38-40 (D.C.1989). However, “[t]he judge not only has the right but also the duty to intercede in an examination to draw more information from reluctant witnesses or experts who are either inarticulate, less than candid, or inadequately interrogated.” Haughton v. Byers, 398 A.2d *8318, 20 (D.C.1979) (citation and internal quotation marks omitted); see also Womack v. United States, 350 A.2d 381, 382-83 (D.C.1976). Judicial intervention may also be permissible or even necessary when the judge detects “a patent omission which might vitiate a full adjudication of the defendant’s guilt or innocence.” Perry v. United States, 364 A.2d 617, 620 n. 4 (D.C.1976); see also Long, 940 A.2d at 100 (in a jury trial, a judge may pose questions to witnesses, inter alia, to clarify testimony, to establish background facts, and to test the witness’ memory).
Nevertheless, under our adversarial system, the judge’s authority to question witnesses should be exercised sparingly, Haughton, 398 A.2d at 21, and when it is exercised, “the judge must at all times remain a disinterested and objective participant in the proceedings.” Davis, 567 A.2d at 39. Moreover, the judge has an obligation not only to be impartial, but also to assure that the appearance of impartiality be preserved. Scott, 559 A.2d at 751.
Had the present ease been tried to a jury, we would entertain some doubt as to whether the judge’s aggressive questioning, directed to defense witnesses only, would have comported sufficiently with the principles of restraint and of adherence to the appearance of impartiality, which principles are designed to assure both that justice be done and that it seem to be done. In a bench trial, however, “a judge’s questioning is less problematic because there is no risk of biasing a jury.” Long, 940 A.2d at 100. Although the imbalance inherent in the judge’s active interrogation only of witnesses for the defense gives us pause, we recognize that to the judge, the defense version of events evidently seemed suspicious and even incredible, while she discerned no comparable problem with the District’s case. We have no doubt that the judge was attempting to ascertain the truth, and that her questioning of witnesses was intended to promote that end. Accordingly, we conclude that on the record taken as a whole, reversal of the judgment is not warranted on the basis of the judge’s intervention.
IV.
OTHER ISSUES
We briefly address three additional claims asserted by T.C. on appeal.
A. Amendment of the Petition
T.C. contends that the trial judge erred by permitting the District to amend its petition by alleging a violation of the PFCV statute. The motion was filed a few days before the evidentiary hearing, and it was granted immediately before the hearing began. T.C. contends on appeal that the PFCV charge is an “additional or different offense” within the meaning of Super. Ct. Juv. R. 7(e), but he makes no serious or credible claim of prejudice. The District takes the position that all of the elements of PFCV were alleged in the armed robbery and CPWOL counts, and that the trial judge did not abuse her discretion in permitting the amendment.
In the trial court, T.C. did not assert that PFCV was an “additional or different offense.” Rather, he claimed that the proposed amendment was untimely because “it’s a substantive motion that shouldn’t [sic] be filed prior to two or three days before trial.” This claim differs materially from the claim on appeal, for Rule 7(e) permits a petition to be amended “at any time prior to the conclusion of a fact-finding hearing if no additional offense or different offense is charged and if substantial rights of the respondent are not prejudiced.” (Emphasis added.) Accordingly, we review T.C.’s claim in this court for *84plain error, for the issue raised on appeal was not presented to the trial judge with reasonable specificity, see Hunter v. United States, 606 A.2d 139, 144 (D.C.), cert. denied, 506 U.S. 991, 992, 113 S.Ct. 509, 121 L.Ed.2d 444 (1992), or indeed at all.
We discern no plain error. Indeed, the only analogous decision that has been brought to our attention is directly contrary to T.C.’s position. See Government of the Virgin Islands v. Bedford, 671 F.2d 758, 765 (3d Cir.1982) (upholding a trial court ruling permitting the amendment of a criminal information where the amended information charged violation of a statute which was not cited in the original information, but which would necessarily have been violated if the allegations in the original petition had been proved). We need not decide whether we would follow Bed-ford if the claim had been preserved; we hold only that the trial court’s ruling was not “plainly” or “obviously” wrong, and that no denial of substantial rights or miscarriage of justice has resulted from the trial judge’s decision allowing the District to amend the petition. See Thomas v. United States, 914 A.2d 1, 8 (D.C.2006).
B. Exclusion of Internet Printout
T.C. contends that the trial judge erred by excluding a printout of bank account activity from the Internet which allegedly showed that he withdrew $143.00 from his account on the day before the robbery. The judge excluded the evidence as hearsay and for lack of a proper foundation, noting that T.C.’s father, through whom the defense sought to introduce the printout, was not a custodian of the record. T.C. cites no contrary authority, and we agree with the District that there was no abuse of discretion. See, e.g., Clyburn v. District of Columbia, 741 A.2d 395, 398 (D.C.1999); In re D.M.C., 503 A.2d 1280, 1282-83 (D.C.1986). We note, however, that this issue might well have been avoided if T.C.’s counsel had presented the evidence through an appropriate employee of the bank. Cf. Roberts v. United States, 508 A.2d 110, 111-12 (D.C.1986); see generally Dutch v. United States, 997 A.2d 685 (D.C.2010). Given the potential importance of the proffered printout — together with the testimony of T.C. and his father, the exhibit might have provided a plausible innocent explanation of T.C.’s possession of three apparently brand new twenty dollar bills — the failure of T.C.’s attorney to call a witness from the bank who could have authenticated the exhibit may have been imprudent, although the record on the point is admittedly sparse.
C. Limitation of Closing Argument
T.C. also claims that the trial judge erroneously limited his counsel’s closing argument. When T.C.’s attorney began to criticize the conduct of the show-up identification as unduly suggestive, the following exchange ensued:
COUNSEL FOR THE DISTRICT: Objection, Your Honor. If he’s actually trying to argue that there’s suggestivity or [lack of] reliability or fairness of the show up, that needed to be filed in a motion, not just argued in closing.
THE COURT: Sustained, you can continue.
COUNSEL FOR T.C.: That’s as to whether that ID should be thrown out, completely. I’m arguing as to how accurate it was.
THE COURT: Go ahead.
Defense counsel did not immediately return to the suggestivity argument, although he did state later, without objection, that the description of his client was vague and “centers mostly upon the dreads.”
We agree with T.C. that the objection should have been overruled. The failure *85of the defense to file a motion to suppress precluded any challenge to the admission of the show-up identification, see Super. Ct. Juv. R. 12(b)(3), but T.C.’s attorney had the right to challenge the weight to be accorded to this evidence, and on appeal, the District does not dispute that this is so.
The judge’s statements to defense counsel that “you can continue” and to “[g]o ahead” must be read in conjunction with her sustaining of the District’s objection. It is unclear whether the attorney was being directed to “go ahead” with his original line of argument or, more probably, to continue his argument but to adapt it to the judge’s ruling on the objection. However, because counsel could have asked for clarification but did not do so, and because, given his subsequent argument, the effect of the judge’s ruling did not substantially prejudice T.C., we conclude that reversal is not warranted.
V.
CONCLUSION
For the foregoing reasons, the decision of the trial court is
Affirmed.
. D.C.Code §§ 22-2801, -4502 (2001).
. D.C.Code § 22-4504 (2001).
. D.C.Code § 22-4504(b) (2001).
. D.C.Code§ 22-4514(b) (2001).
. D.C.Code§ 7-2506.01.
. The defense attempted to introduce an Internet printout from the account showing this withdrawal, but the judge excluded the document as hearsay. T.C.'s attorney did not question the judge’s hearsay ruling, and the proposed exhibit apparently was not made a part of the record on appeal.
. During the course of his own testimony, T.C. confirmed that he had made this withdrawal, and that on July 2 he had taken $60 with him because he had planned to go shopping for clothes with one of his friends.
8.Officer Ryan Small testified on rebuttal and, as the judge noted, cast some doubt on the defense position that the young men were playing basketball until shortly before T.C.'s arrest.
. The identification of strangers is proverbially untrustworthy. The hazards of such testimony are established by a formidable number of instances in the records of English and American trials.
Webster, 623 A.2d at 1204 n. 15 (quoting Felix Frankfurter, The Case of Sacco and Vanzetti (1927)).
. Cartwright stated that on seeing T.C., he was "fairly certain” that T.C. was one of the robbers. Cartwright went on to testify, however, that he had no hesitation, at the show-up or in the courtroom, in stating that T.C. was one of the persons who robbed him.
. In the trial court, T.M. was not represented by his counsel on appeal.
. T.C. also complains that the judge objected, sua sponte, to certain defense testimony and then sustained her own objections. In general, this practice should be avoided, for making objections is the function of counsel and not the court. In this case, to be sure, two of three objections made and sustained by the judge were to obvious hearsay. But “hearsay evidence admitted without objection may be properly considered by the trier of fact and given its full probative value." Abdulshakur v. District of Columbia, 589 A.2d 1258, 1265 (D.C.1991) (quoting Mack v. United States, 570 A.2d 777, 782 (D.C.1990)). In Abdulshakur, the hearsay at issue related to a Mohawk computer printout, while in this case, the testimony to which the judge sustained her own objection was generated, albeit indirectly, by the defense attempt to introduce the printout of the bank record. Nevertheless, it is most improbable that counsel for the District would have failed to object to hearsay as obvious as that presented here, and we are satisfied that T.C. was not substantially prejudiced.
The third question to which the judge sustained her own objection, also referring to the bank printout proffered by the defense, was as follows:
Q And does it reflect any activity on or around July 1?
THE COURT: Leading, sustained.
Whether this question was improperly leading is debatable, and we discern no reason for the judge to intervene on her own initiative. As we have seen, however, the document was subsequently excluded for lack of a proper foundation. In sum, the judge's making and sustaining of her own objections, while unnecessary and perhaps improvident, did not constitute or even approach prejudicial error warranting reversal of the judgment.
. T.C.'s claim that the judge's questioning was not impartial was raised for the first time on appeal, and the District argues, not without some force, see Long v. United States, 940 A.2d 87, 100-01 (D.C.2007), that our review should be for plain error only. Indeed, T.C. has not filed a Reply Brief or otherwise challenged the District’s contention. We recognize, at the same time, that it would have been difficult to object to the judge's questioning when to do so would have risked irritating the person who was not only the trier of fact but also the individual who would be called upon to decide whether T.C., if found involved, would lose his freedom. See Belton v. United States, 581 A.2d 1205, 1212 (D.C.1990) *80("it would be expecting too much to hold a defendant accountable for failing, in effect, to accuse a judge of bias at the hearing just before the discretionary, virtually non-reviewable act of sentencing takes place”); Scott v. United States, 559 A.2d 745, 755 (D.C.1989) (en banc) (stating that it "hardly would be appropriate to place on a criminal defendant the burden to attack a judge’s integrity”). To some extent, T.C.’s attorney may have thought that he was between a rock and a hard place; he could object to aggressive questioning by the judge of defense witnesses only, thus implicitly accusing her of unfairness, with the possibility of less than favorable consequences for his client, or he could withhold any objection and risk waiving his claim of lack of impartiality. Because, for the reasons set forth in the text, we conclude that T.C.’s claim, even if treated as having been preserved, does not warrant reversal, we need not decide whether the plain error standard applies here, as it did in Long.
. The suspects had been shown separately to Cartwright and to Amato.
. The judge also briefly questioned T.C.