This direct appeal is before us on remand from the Pennsylvania Supreme Court for consideration of (1) appellant’s challenge to the sufficiency of the evidence to support his conviction of simple assault and possession of an instrument of crime and (2) appellant’s claim that he was prejudiced because the victim did not testify at his non-jury trial.
Commonwealth v. Leatherbury,
Appellant’s fifth reason in support of his motion for “post verdict relief” alleged that “[tjhere was insufficient evidence to establish beyond a reasonable doubt that any crime was committed, especially in light of the fact that no complainant ever testified, either at trial or at the prelimi *226 nary hearing.” 2 Whether appellant moved for arrest of judgment, or a new trial, by this motion is unclear since he merely requested “post verdict relief”. As we understand appellant’s motion, he sets forth two separate claims of error that would warrant different remedies if either were found to be supported by the record.
An allegation that the evidence is insufficient to support a conviction is properly the basis for a motion in arrest of judgment.
Commonwealth v. Holmes,
A claim that the criminal defendant was unfairly prejudiced by the absence of a vital witness’ testimony is grounds for a new trial, if correct.
Commonwealth v. Horn,
In testing the sufficiency of the, evidence, we look to the evidence introduced at trial. Officer Melvin. Smith was the only witness at appellant’s trial and he gave the following testimony. On April 21, 1976, at approximately 8:30 p.m., Officer Smith and his partner, Officer Bruce Allen, were on foot patrol at 46th and Market Streets in Philadelphia. The area was well-lit and there was little traffic. Officer Smith observed the appellant and another man standing on the southeast corner of the intersection. A minor traffic accident occurred and the driver of one car involved in the accident, later identified as Mr. Raymond Johnson, got out of his car and walked over to the driver and passenger of the other vehicle to discuss the accident. Appellant and his companion then approached the three motorists and soon after, Officer Smith noticed that appellant was holding Mr. Johnson in a headlock while his companion searched Johnson’s pockets. When Officer Smith attempted to arrest the appellant and his companion, he saw something fly from appellant’s right hand and he heard it hit the ground. He retrieved a paring knife with a steel blade. Money and a wallet containing Mr. Johnson’s identification were found on the ground immediately following the incident.
Appellant claims that the evidence was insufficient because the police officer did not observe, nor could he hear, what ensued prior to the struggle. Consequently, appellant argues that several non-criminal explanations for his actions were not precluded by the testimony at his trial. For example, he may have been acting in self defense or merely attempting to obtain Mr. Johnson’s identification. These contentions conveniently ignore the undisputed testimony that a knife fell from appellant’s hand when he was arrested and also, that the victim’s wallet and money were
*228
found on the ground nearby. This evidence, combined with the fact that appellant held the victim in a headlock while his companion went through the victim’s pockets, was more than sufficient to support the convictions for simple assault and possession of an instrument of crime. The sole testimony of a police eyewitness may be sufficient to establish the elements of a crime.
In Re Gonzales,
Appellant further claims that he was prejudiced by the Commonwealth’s failure to call the victim to testify as a witness. This argument is without merit. The Commonwealth is not bound to call the victim of a crime as a witness as long as testimony is not withheld solely because it would be favorable to the defendant.
Commonwealth v. Jones,
In the instant case, the record reveals that the name and address of the victim were known to both the prosecution and the defense. Whether the victim was available at the time of trial is unclear; however, the record discloses
*229
that the defense never requested that the Commonwealth inform them of the victim’s whereabouts, nor did the defense attempt to call the victim as a witness. In fact, the defense attempted to exclude evidence of the victim’s address. Moreover, there is no indication that the victim’s testimony would have been favorable to the appellant.
Commonwealth v. Jones, supra,
Appellant further claims that the evidence was insufficient because the driver and the passenger of the other car involved in the accident were not called as witnesses. We find that appellant waived this claim of error. As previously explained, unless a separate claim of error is alleged, a challenge to the sufficiency of the evidence does not require that we speculate regarding other evidence that may have been introduced at trial. Here, appellant did not allege in post-trial motions that he had been prejudiced by the Commonwealth’s failure to call other witnesses and he did not make this argument before the post-verdict motions court. This issue, therefore, was not preserved for appellate review.
Commonwealth v. Grace,
Judgments of sentence affirmed.
Notes
. When this case was first before our Court on direct appeal, the judgments of sentence were vacated and an order whs entered discharging appellant pursuant to Pa.R.Crim.P. 1100.
Commonwealth v. Leatherbury,
. Pre-trial motions in this case were filed prior to our decision in
Commonwealth v. Holmes,
