Appellant, Christopher Nolen, appeals from a judgment of sentence imposed following a jury verdict finding him guilty of second degree murder, 1 criminal conspiracy 2 and robbery. 3 The trial court denied and dismissed appellant’s timely post-trial motions. On appeal, appellant challenges: (1) the admissibility of evidence of appellant’s involvement in two burglaries which were not the offenses charged in this case; (2) the trial court’s denial of appellant’s motion for a mistrial after the Commonwealth made reference to appellant’s silence during his first trial and preliminary hearing; (3) the trial court’s refusal to permit appellant to cross-examine a Commonwealth witness on whether the witness received favorable treatment in exchange for his testimony at trial; and (4) the trial court’s denial of appellant’s motion for a mistrial after the Commonwealth indirectly referred to appellant’s first trial during its opening statement. For the following reasons, we affirm.
Appellant’s convictions arose out of the fatal shooting of Carroll Ritchie during the robbery of Ritchie’s tavern in Londonderry Township, Pennsylvania. During the evening of November 21, 1981, two masked men armed with handguns entered Ritchie’s bar; one threatened, “Don’t move or I’ll shoot.” When Ritchie came out from behind the bar and ordered them to leave, each of the robbers fired his gun, *351 then one fired a third shot which hit and killed Ritchie. The gunmen fled.
While investigating the incident, the police found one .38 caliber bullet and one .32 caliber bullet in the walls of the tavern; the third bullet, .38 caliber, was removed from Ritchie’s body.
The driver of the getaway car, David Crater, confessed to his role in the incident and revealed the identity of the two gunmen as Christopher Nolen, the appellant, and Dauntel Evans. During the trial, Crater testified to the following facts. At about 6:00 p.m. on November 21, 1981, Crater met up with appellant and Evans to carry out the robbery they had planned a few days earlier. When they arrived at Ritchie’s bar, Crater went in, checked the place out, and then returned to the car. Appellant and Evans concealed their faces with clothing and, armed with guns, entered Ritchie’s establishment. Crater waited in the car. Shortly thereafter he heard three gunshots. Appellant and Evans ran back to the car. After driving to their hometown, appellant gave his gun to Crater who later threw it into a nearby creek.
The police recovered the gun from the creek. A ballistics expеrt identified it as the weapon which had fired the .38 caliber bullet removed from Ritchie’s body.
The first issue before us in this appeal concerns evidence admitted by the trial court of appellant’s participation in two burglaries connected to the Ritchie robbery and shooting. Both appellant and Crater testified that on November 12, 1981, they and two other men burglarized the home of Warren Brubaker. The murder weapon retrieved from the creek after the Ritchie robbery was later identified as a handgun taken during the Brubaker burglary. Crater and appellant also testified that on November 19, 1981, Evans, Crater and appellant burglarized the home of Earl Herring. A handgun was taken during this burglary. An expert testified that the .32 caliber projectile recovered from the wall of Ritchie’s tavern and a .32 caliber cartridge found in the getaway car matched ammunition left behind in the *352 Herring burglary. He also testified that these projectiles could have been used in the type of firearm stolen during the Herring burglary. Appellant argues that the trial сourt erred in admitting evidence of the Brubaker and Herring burglaries.
As a general rule, evidence of distinct crimes is inadmissible against a defendant who is being tried for another crime if it is admitted merely to show the defendant’s criminal disposition.
Commonwealth v. Lark,
The trial court held that evidence of the Brubaker and Herring burglaries falls within the “same transaction” exception. We agree. Appellant’s participation in the Brubakér burglary links him to the murder weapon, showing that he had the opportunity for access to, and possession of, the gun. This is a critical link in the history of the case connecting appellant with the Ritchie robbery and murder. Appellant’s participation in the Herring burglary, along with Evans and Crater, is evidence of other activity with the co-conspirators and thus is probative of whether or not a conspiracy existed amоng the three men.
See Commonwealth v. Barnhart,
Once the court establishes that the “same transaction” exception applies, it must balance the prejudicial impact of the evidence against its probative value to determine admissibility.
Commonwealth v. Murphy, supra
Appellant next claims that the trial court erred in denying his motion for a mistrial after the Commonwealth
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referred to appellant’s failure to testify during his first trial and preliminary hearing. A reference at trial to an accused’s post-arrest silence is a violation of his or her constitutionаl right against self-incrimination.
Commonwealth v. Melvin,
While cross-examining appellant, the district attorney indirectly referred to appellant’s failure to testify at the prior proceedings. The questioning went as follows:
BY MR. KLEINFELTER:
Q. Christopher, you have been present throughout the course of this trial and listened to every witness who has testified, have you not?
A. Yes, I have.
Q. And you were present at another proceeding and listened to the testimony of every witness that testified, did you not?
A. Yes, I have.
Q. And you were present at a preliminary hearing and listened to witnesses from the Commonwealth testify and heard every one of them, didn’t you?
A. Yes, I have.
*355 Q. Prior to your testimony here in this courtroom today, however you have not testified yourself, have you?
N.T. November 17, 1986 at 420.
The district attorney elicited the testimony concerning appellant’s previous silence to point out appellant’s advantage in having heard all of the Commonwealth witnesses’ testimony and appellant’s opportunity to cоnform his testimony to theirs. It was improper for the district attorney to question appellant on his previous failure to testify, and, thus, the questioning may have prejudiced appellant. The district attorney did not urge the jury to infer appellant’s guilt from his silence at the prior proceedings, and thus did not exploit appellant’s testimony.
The trial judge disаllowed any further questioning on appellant’s lack of participation during the prior proceedings. Defense counsel indicated that he did not want any immediate curative instructions on appellant’s right not to testify because he did not want the point emphasized. N.T. November 17, 1986 at 421-22. At the close of the testimony, the judge instructed the jury that appellant had an absolute right not to testify. The trial court’s instructions to the jury cured any error due to the Commonwealth’s reference to appellant’s silence at the prior proceedings. We hold that the trial court did not err in denying appellant’s motion for a mistrial.
Appellant next asserts that the trial court erred in refusing to permit defense counsel to cross-examine Joey Boyer, a Commonwealth witness, concerning two unrelated charges which had been pending against Boyer at the time he agreed to testify, but which had been dismissed shortly before appellant’s trial. Although we find error in the trial court’s ruling, we find that the error was harmless.
Boyer’s trial testimony corroborated portions of Crater’s testimony. Boyer testified that he had been with appellant, Evans and Crater on the evening of the Ritchie incident while they were gathering guns and bullets, but he had gone home before the threesome drove to Ritchie’s bar.
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It is well established that defense counsel may cross-examine a prosecution witnеss on possible favorable treatment received from the prosecution in exchange for the witness’ testimony.
Commonwealth v. Evans,
A reading of
Coades
and
Evans
together, however, requires that a defendant be permitted to cross-examine a prosecution witness as to favorable treatment which the witness may have already received from the prosecution on charges unrelated to the case at bar. In the
Coades
and
Evans
cases, the Court was concerned about potential bias on the part of the witness due to the witness’ hopes for leniency or due to favorable treatment already received by the witness. A similar potential for bias exists in the instant situation. When Boyer agreed to testify for the Commonwealth, he was in the Dauphin County Prison facing a theft charge in Dauphin County and facing extradition to Virginia for burglary and theft. Between this time and the start of the trial, the Virginia charges were drоpped and the Dauphin County charge was reduced to criminal mis
*357
chief. Boyer was given a $200 fine and released from prison. These facts raise the inference that when Boyer agreed to testify for the Commonwealth in appellant’s case, he had expectations of leniency concerning his own pending charges, and thаt when he actually did testify, he felt obliged to tailor his testimony to favor the prosecution. The trial court should have permitted appellant to expose this possible bias to the jury. Instead, the trial court allowed questioning of Boyer and the district attorney outside of the hearing of the jury, and, on the basis of that testimony, determined that Boyer’s previous charges were dropped and reduced without any input from the prosecution. Even in the absence of any agreement between the Commonwealth and Boyer, appellant deserved the opportunity to show that Boyer could have been influenced by feelings of gratitude toward the Commonwealth since the сharges pending against Boyer had been dropped shortly after he agreed to testify. “Whatever tends to show the interest or feeling of a witness in a cause is competent by way of cross-examination.”
Coades,
supra
In deciding to prohibit cross-examination on this question, the trial court incorrectly focused on the fact that there were no pending criminal actions against Boyer at the time of trial. If this were the test, then the Commonwealth need only ensure that its witness receive the favorable treatment before the start of the trial to avoid cross-examination challenging thе witness’ bias.
Even though the trial court erred, we are convinced that the error was harmless beyond a reasonable doubt.
Commonwealth v. Story,
Further, Boyer’s testimony was consistent with his testimony at appellant’s first trial. When Boyer testified at the first trial, he was not facing any charges and there was no question of any possible deals between the Commonwealth and him.
On reviewing the whole record, we conclude that the error of denying defense counsel the opportunity to cross-examine Boyer on possible agreements between the Commonwealth and Boyer was harmless beyond a reasonable doubt.
The trial court also denied defense counsel’s motion for a mistrial following the Commonwealth’s reference to “a pri- or proceeding.” Appellant contends that this was reversible error. During its opening statement, the Commonwealth told the jury that it would become obvious during this trial that there was a prior proceeding in this case and that what happened there need not concern them here. N.T. Opening 13-13.
The opening statement serves to inform the jury how the case will develop, its background, and what will be attempted to be proven at trial.
Commonwealth v. Nelson,
Even if it were error for the trial court to permit the Commonwealth’s statement, in order for a defendant to obtain judicial relief, the effect of the Commonwealth’s statement during its opening must so prejudice the jury against the accused as to prevent the finding of a true verdict.
Commonwealth v. Galloway,
For these reasons, we affirm the judgment of sentence.
Judgment of sentence affirmed.
Notes
. 18 Pa.C.S.A. § 903.
. 18 Pa.C.S.A. § 3701. In a first trial in this case, a jury found appellant guilty of second degree murder, robbery and сriminal conspiracy. This Court affirmed the convictions.
See Commonwealth v. Nolen,
. On appeal from his first trial, Appellant challenged the admissibility of the Brubaker and Herring burglaries.
Commonwealth v. Nolen,
