The only issue properly raised in this appeal is whether the trial court abused its discretion by a determination during trial that four prior robbery convictions would be received to attack appellant’s credibility if he testified. 1 We conclude that it was an abuse of discretion and reverse.
*391 At or about 1:30 o’clock, A.M., on May 17, 1977, Janet and Robert Richards had alighted from their vehicle and were standing in the driveway of their home when they were assaulted and robbed by three black men. Richards was injured while struggling with one of the robbers. Taken from him while he was held on the ground were credit cards and four hundred dollars ($400) in currency. Two rings were taken from Mrs. Richards, one of them having been chewed from her finger after she had been thrown to the ground. Mrs. Margaret Smith, a guest of the Richards, escaped and ran to the home of a neighbor. Appellant was identified by the victims from a photographic display after appellant had been arrested on other charges.
When, at trial, the Commonwealth’s intention to use four prior robbery convictions to attack appellant’s credibility became apparent, an evidentiary hearing was held outside the presence of the jury. It was demonstrated that four convictions had been obtained in 1970, for crimes occurring in 1967 and 1969. Appellant had been incarcerated by virtue thereof until March, 1977. He told the trial judge that he wanted to testify but would not do so if the prior convictions were held to be admissible. When asked about the nature of his testimony, appellant told the court that he would offer a general denial that he had robbed the Richards or had ever seen them. The court concluded that inasmuch as the verdict would be dependent upon the credibility of the victims and the credibility of appellant, it was important that the jury know of appellant’s prior convictions in order to make an accurate assessment of his credibility.
Whether or not to admit prior convictions to impeach credibility is discretionary with the trial court. In order to provide for a meaningful exercise of that discretion, the Supreme Court in
Commonwealth
v.
Bighum,
In
Commonwealth v. Roots,
The burden of proof is upon the prosecution to show that the need for this evidence overcomes its inherent potential for prejudice.
Commonwealth v. Roots,
supra,
Although the question is a close one, we are constrained to hold that the trial judge abused his discretion in the instant case. Admittedly, the convictions were for robbery, a crime which involves an element of dishonesty and which does tend to discredit a witness as being untruthful. See:
Commonwealth v. Perrin,
Moreover, if a defense existed, it could be presented only by appellant’s taking the stand and giving testimony himself. The Commonwealth, on the other hand, could rely upon the testimony of Mr. and Mrs. Richards, as well as that of Mrs. Margaret Smith, a passenger in their car. Thus, it was important that appellant have an opportunity to testify. See:
Commonwealth v. Cobb,
Reversed and remanded for a new trial.
Notes
. A second issue pertaining to the court’s denial of a motion to continue a pre-trial lineup has been waived by appellant’s failure to
*391
raise it in post trial motions.
Commonwealth v. Twiggs,
