
7 Mass. App. Ct. 150 (1979)
387 N.E.2d 594
COMMONWEALTH
vs.
JOSEPH A. COTE, JR.
Appeals Court of Massachusetts, Barnstable.
November 14, 1978.
March 8, 1979.
Present: HALE, C.J., ROSE, & GOODMAN, JJ.
Steven J. Rappaport for the defendant.
Gary A. Nickerson, Assistant District Attorney, for the Commonwealth.
GOODMAN, J.
We affirm the order denying the defendant's motion for a new trial, filed after our decision in the case of Commonwealth v. Cote, 5 Mass. App. Ct. 365 (1977), in which the defendant's conviction of burglary was affirmed. The facts are set out in that case. The defendant contends that the counsel who represented him at trial[1] also represented one Jeffrey Ford on other *151 indictments (not alleged to have been connected with the indictment against Cote) and that this dual representation created a conflict of interest. At the trial it appeared that Ford's name was on the contract for the rental of a U-Haul truck which, from the evidence, was used in the burglary on Saturday evening, January 17, 1976, and which Cote was identified as having driven the following afternoon and as having subsequently returned to the gas station from which it had been rented.
Dual representation may result in a conflict of interest which deprives a defendant of effective assistance of counsel, but the defendant must show dual representation and either "a real conflict or [a] specific instance of prejudice. "Commonwealth v. Adams, 374 Mass. 722, 731 (1978), quoting from Miller v. United States, 564 F.2d 103, 106 (1st Cir.1977), cert. denied, 435 U.S. 931 (1978). In determining whether the defendant has made a sufficient showing, we look only to the record before the judge who heard the motion. We thus consider the affidavit attached to the motion, the transcript of the hearing on the motion, and, since that judge had presided at the trial, we also consider the trial transcript, although it had not been specifically made an exhibit. Cf. Commonwealth v. Donahue, 6 Mass. App. Ct. 971, 971-972 (1979). We do not consider the addenda attached to the defendant's brief; they were not made exhibits, and we do not know whether they were examined by the judge. Commonwealth v. Hubbard, 371 Mass. 160, 176 (1976). The record does not show the extent to which or the time when Cote's trial counsel had represented Ford. The transcript of the trial is silent on this matter, and the affidavit made by Cote's present counsel merely asserts that he "ha[d] been informed" that Ford "was actually a former client" of Cote's trial counsel. Cote's present counsel presented no evidence at the hearing on the motion but contented himself with what was in effect an argument on the law, *152 during the course of which he did no more than assert that Ford and Cote had both been represented by Cote's trial counsel. There is thus nothing to show that the representation of Ford (assuming it existed) was such, in time and nature, that trial counsel "owed [Ford] any continuing duty of loyalty at the time of [Cote's] trial" which could have affected his decision whether to call Ford as a witness. Commonwealth v. Smith, 362 Mass. 782, 783 (1973). Commonwealth v. Wright, 376 Mass. 725, 732 (1978). Nor do we know what considerations entered into trial counsel's decision not to call Ford, a possible course which would obviously have suggested itself in any event. The record is silent whether calling Ford was a viable tactic, or whether it would have been so clearly counter-productive that such dual representation as might have been shown could not reasonably have entered into the decision not to call Ford. Indeed, there is nothing to show that Ford was available at the time of Cote's trial. See Commonwealth v. Adams, 374 Mass. at 730-731.
On this scant record our decision is impelled by such cases as Commonwealth v. Adams, 374 Mass. at 730-731, Commonwealth v. Smith, 362 Mass. at 783, Commonwealth v. Wright, 376 Mass. at 730-732, and Commonwealth v. Soffen, 377 Mass. 433 (1979) (see Miller v. United States, 564 F.2d at 106-107; United States v. DiCarlo, 575 F.2d 952, 955-957 [1st Cir.], cert. denied, 439 U.S. 834 [1978]). Compare Commonwealth v. Geraway, 364 Mass. 168, 174 (1973) (involving representation of a Commonwealth witness with whom the law office of defense counsel had close ties). See Porter v. United States, 298 F.2d 461, 463-464 (5th Cir.1962); United States ex rel. Miller v. Myers, 253 F. Supp. 55, 56-57 (E.D. Pa. 1966).
Order denying motion for new trial affirmed.
NOTES
[1]  The defendant is presently represented by other counsel who also represented him on the motion for a new trial.
