Thе defendant Michael V. LaCorte (LaCorte) was indicted for murder in the first degree in connection with the death of Richard White in White’s Boston apartment on May 29, 1974. After a five-day trial in the Superior Court, a jury found LaCorte guilty of murder in the second degree, аnd the judge sentenced him to fife imprisonment. The defendant’s assignments of error are here pursuant to G. L. c. 278, §§ 33A-33G, as amended. We conclude that there was no error.
Responding to a call from a neighbor, Boston police officers enterеd White’s Marlborough Street apartment at approximately 6:05 a.m. and found White dead on the floor, bleeding from multiple stab wounds, a scarf tied around his neck like a noose. The jury were warranted in finding the following facts based on the Commonwealth’s evidence. LaCorte had been with White on the night in question. He was seen in a restaurant with White about 11 p.m., and a third man was present with them. LaCorte and the unidentified man left together, but were seen with White again outside the restaurant about 1:25 a.m. At that time, the men sеemed to be arguing. White was trying to walk away from the others, but LaCorte kept tugging at White’s jacket and led him in another direction, saying, “Come on here, come on this way.” About 6 a.m. a neighbor in an apartment adjacent to White’s was awakened by loud screaming. Looking out her window, she saw two men running from White’s building accompanied by a woman. In White’s apartment, police found two cardboard coffee cups, one of which bore fingerprints which, in the opinion of the Commonwealth’s expert witness, were “identical” to prints taken from LaCorte at the time of his arrest. Approximately four months later, in October, 1974, LaCorte *702 bragged to a group of friends about crimes he had committed in the past, including a murder — which he reenacted for them. He related how he and a friend had “roundhoused” a Marlborough Street man who had “ripped us off.” He illustrated his story by standing up one of his listeners, spinning him around, and pretending to stab him repeatedly at each turn. LaCorte told his friends — two of whom testified at trial — thаt his victim had fallen through a glass window during the struggle. Police found a broken window in White’s apartment, and tests revealed that pieces of the broken glass were stained with blood.
1. The defendant argues that the cardboard cup bearing his fingerprint should have been excluded at trial because the prosecution failed to establish that the fingerprint was placed thereon in the apartment during the commission of the crime. This foundation, the defendant argues, is necessary to eliminate the possibility that LaCorte may have left the fingerprint during a previous visit to the apartment unrelated to the crime. Without it, he seems to argue, the evidence is irrelevant. We disagree. Certainly fingerprints found in the apartment of the victim immediately after the homiсide have some tendency to prove the identity of the killer. It is this rational tendency to prove an issue in the case that makes the cup relevant and, subject to other rules, admissible.
Commonwealth
v.
Ross,
That is not to say, of course, that the mere discovery of the defendant’s fingerprints at the scene of the crime, without further evidence linking the defendant to the crime, would be sufficient identification to support a conviction. Courts universally consider the fingerprint comparison to be an adequate and reliable method of identification. 2 J. Wigmore, Evidence § 414, at 390 (3d ed. 1940). See, e.g.,
Commonwealth
v.
Bartolini,
2. Defense counsel argues that a standard fingerprint card, kept as an arrest record by the Boston police department, was not adequately authenticated as one bearing the *704 prints of the defendant and thus could not furnish a relevant standard against which the expert witness could compare the fingerprint found in White’s apartment. We disagree. The Commоnwealth offered the card through the police officer who fingerprinted LaCorte at the time of the arrest. The officer testified that on October 29, 1974, he took the fingerprints of a person — whom he identified in court as the defendant — and reсorded them, together with that person’s photograph and signature, on a standard fingerprint card. Defense counsel appears to have conceded at trial that the photograph and signature were genuine.
The officer identifiеd the card offered by the prosecutor as the card on which he had taken LaCorte’s fingerprints, and the judge received the card in evidence as an exhibit. The prosecutor made no attempt to account for the custody of thе fingerprint card between the date of arrest and the date of the trial. The defendant argues that this constitutes a gap in the evidence fatal to the authentication and that the judge erred in admitting the card as a genuine set of LaCorte’s fingеrprints. This argument mis-perceives the nature of the authentication requirement.
In order to be material, a thing offered in evidence genuinely must be what its proponent represents it to be. Its authenticity must be stipulated or else proved like any other fact. “Such proof of authenticity usually takes the form of testimony of a qualified witness either (1) that the thing is what its proponent represents it to be, or (2) that circumstances exist which imply that the thing is what its proponent represents it to be.” W.B. Leaсh & P.J. Liacos, Massachusetts Evidence 265 (4th ed. 1967). In this case there was testimony from the officer who had taken the defendant’s fingerprints that the proffered card was the one used in the fingerprinting. In light of such direct identification of the card and its contents, unсon-troverted in cross-examination or by any other evidence, there was no necessity to authenticate the card by circumstantial proof, such as showing the chain of custody of the card since the fingerprints were taken.
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3. The Commonwealth’s expert testified that he considered one of the fingerprints on the coffee cup “to be identical with the left middle finger of one Michael Vincent LaCorte.” The defendant took exception to the use of the word “identical” аnd argues that the expert invaded the province of the jury by expressing an opinion as to an ultimate fact. There was no error. This court has held that “a question which calls for an opinion which is in the domain of the expert’s professional knowledge is not necessarily to be excluded merely because the conclusion of the witness reaches or approaches the ultimate issue before the jury.”
Commonwealth
v.
Montmeny,
4. The defendant has assigned as alleged errors several evidentiary rulings by the judge excluding questions put to prosecution witnesses on cross-examination. We hold that there was no error in any of the rulings. The questions raised are not novel, and all involved the element of judicial discretion with no showing of any abuse of that discretion. We therefore describe the alleged errors only to the еxtent necessary to identify them in disposing of the claims of error.
(a) While cross-examining one Officer Charbonnier, defense counsel showed the witness certain photographs, admitted as exhibits, depicting the room where White’s body
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was discoverеd. Counsel was attempting to demonstrate where the coffee cup bearing LaCorte’s fingerprints was to be found in each picture. After a number of similar questions, the judge excluded further oral testimony and submitted the photographs to the jury. The witness hаd not been present when the photographs were taken, and his responses were nothing more than his own interpretation of them. The exclusion reveals no error. See generally
Commonwealth
v.
Sandler,
(b) The trial judge excluded a question put to witness Sapauskas which would have established that Sapauskas entered the Warrenton Center for Addiction on October 9, 1974 — five days after LaCorte had reenacted the murder in the presence of Sapauskas and others. The judge ruled the testimony immaterial, and we agree. The defendant argues that this exclusion prevented counsel from inquiring into the witness’s possible mental impairment at the time he witnessed LaCorte’s dramаtization. We find from the record, however, that Sapauskas’s drug addiction at the time of the reenactment was the subject of extensive cross-examination. There was no error.
(c) The patrolman who discovered White’s body, one Officer Bickerton, was asked on cross-examination whether he “had some information whether or not a woman had been in the apartment at about 5:30 that morning?” The prosecutor did not object, but the judge excluded the question on his own motion. It is true that the nеighbor who had called the police testified to seeing a woman running from White’s building with two men. Officer Bick-erton himself testified that he had found women’s clothing in White’s apartment. Clearly, however, Officer Bickerton could have had no first hand knowledge of the рresence of a woman at the scene prior to his arrival, and the judge
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might have excluded the question on this ground. Since there is no suggestion by the defense that Officer Bick-erton had any such knowledge, counsel’s reliance on
Commonwealth
v.
Johnson,
5. The defendant аrgues that the prosecutor asserted his personal belief in the defendant’s guilt during his closing argument to the jury. There is no merit to this contention. The prosecutor said: "I’m fully confident... as sure as my name is Doyle, that I expect a truthful verdict by twelve peoрle of courage, by twelve people joined together in a single unit dedicated to one purpose and one purpose alone: What is the truth in this case.” This argument was not improper. Both judge and counsel may properly impress upon the jury their duty to act with courage as well as impartiality.
Commonwealth
v.
Clark,
6. We have reviewed the entire record in accordance with our duties under G. L. c. 278, § 33E. We find that the verdict is in accordance with the law and the weight of the evidence, and we observe nothing which in justice indicates that we should modify the result reached by the jury.
Judgment affirmed.
Notes
Since the defendant may have been in White’s apartment on other occasions, the defendant might have beеn entitled to a limiting instruction emphasizing that the fingerprints were admitted in evidence to *703 show only that the defendant was present there at some time. However, because of other circumstantial evidence in this case, the judge might well have ruled that the defendant was not entitled to such an instruction. In any event, the question is not before us, because the defendant requested no such instruction.