Defendant appeals his February, 1980, conviction by a jury for criminal sexual *702conduct in the first degree, MCL 750.520b(1)(f); MSA 28.788(2)(1)(f). Sentenced March 14, 1980, to a term of 20 to 80 years imprisonment, defendant appeals as a matter of right raising four issues, one of which is of first impression.
On the night of July 22, 1979, defendant invited Penny Giles to go with him to a mutual friend’s home. Penny, who had known defendant for some three years and had occasionally dated defendant’s brother, accepted. Instead of driving to the friend’s home, defendant drove in the opposite direction to Lime Lake where he struck Penny on the head with a beer bottle when she resisted his kisses. Defendant then drove to a cornfield where he repeatedly sexually assaulted Penny, then drove her back to her home where he dropped her off after threatening that he would kill her if she told anyone what had transpired.
On the day of trial and just before a jury was selected, the defendant moved for a continuance so that he could obtain substitute counsel. Defendant’s reasons for wanting substitute counsel are set forth in defendant’s brief. Defendant’s appointed counsel had represented defendant on a criminal sexual conduct charge which had been tried on January 15, 1980, some 40 days prior to the commencement of the instant trial. Defendant was convicted in that case and was unhappy with having the same attorney again represent him. However, those reasons were not stated to the trial court. The prosecutor informed the trial court that the case had initially been set for trial on January 15, 1980, the same date as the similar charge had gone to trial before a different judge, and that the trial date, February 25, 1980, had been scheduled and notices sent on January 21, 1980. The prosecutor explained that witnesses had been *703brought in for the trial and defendant had been brought in from prison. The court denied the motion for a continuance, stating that there was no good reason to grant an adjournment for the purpose stated.
In determining whether a trial court has abused its discretion in failing to grant a continuance, a reviewing court looks to the five factors set forth in People v Wilson, 397 Mich 76, 81; 243 NW2d 257 (1976). Application of those factors to the situation before us discloses no abuse of discretion. Contrary to what defendant now claims on appeal, the transcript discloses that the defendant never informed the court of the reasons why he wanted a different attorney. Those reasons appear for the first time in defendant’s brief on appeal. Further, defendant was negligent in waiting until the moment of trial before asking for an adjournment. On January 15, 1980, the prosecutor stated that he was ready to try the case immediately. A trial court cannot be found to have abused its discretion where the facts are not made known at trial.
While counsel were arguing whether certain prior consistent statements of Penny Giles should be admitted into evidence as contended by the prosecution, the jury inadvertently entered the room. The jury heard the court announce that though the argument of the prosecution was logical, opinions of the Court of Appeals would not allow the testimony in evidence. Defendant claims that this was error. We disagree. The contents of the witness’s statement were never made known to the jury. Under similar circumstances, where the jury heard an objection upheld but did not hear the testimony to which the objection was directed, this Court found no error. Schweim v Johnson, 10 Mich App 81; 158 NW2d 822 (1968). Additionally, *704we do not find that the court’s comment was prejudicial to the defendant. As such, no error occurred. People v Cole, 349 Mich 175, 187; 84 NW2d 711 (1957).
The third issue is of first impression. Tom Herrera was originally endorsed on the information as a res gestae witness. Subsequently, he was listed as an alibi witness on the notice of alibi filed by the defense. Nevertheless, he was called by the prosecution as a witness for the people and upon direct examination made statements inconsistent with prior statements given deputy sheriff Lazaroff. Upon redirect examination, the prosecutor began to question the witness about his prior inconsistent statements, and defendant objected on the grounds that the prosecution could not impeach its own witness. The court overruled the objection. Likewise, when the prosecutor asked deputy Lazaroff about the statement Herrera made to him, defense counsel’s objection was overruled.
The people contend that Herrera was a res gestae witness, and therefore could be impeached under MRE 607(2)(A). According to the people, Herrera was a res gestae witness because his testimony would have aided in developing disclosure of the facts surrounding the alleged commission of the charged offense. The flaw in the people’s argument is that in order to be a res gestae witness, a person must be an eyewitness to some event in the continuum of a criminal transaction. In the present case, Herrera saw defendant before he went over to Penny Giles’s house, but did not witness any event in the continuum of a criminal transaction. In our opinion, Herrera was not a res gestae witness.
The trial court ruled that Herrera could be *705impeached by the prosecutor because Herrera’s trial testimony surprised the prosecution. Defendant argues that the prosecutor could not have been surprised because he was notified that Herrera might be called as an alibi witness. We agree with defendant that the prosecution was not surprised. Consequently, we find that the trial court erred in allowing the witness to be impeached.
However, we find the error harmless. In People v Robinson, 386 Mich 551; 194 NW2d 709 (1972), harmless error was defined:
"Where it is claimed that error is harmless, two inquiries are pertinent. First, is the error so offensive to the maintenance of a sound judicial process that it never can be regarded as harmless? * * * Second, if not so basic, can we declare a belief that the error was harmless beyond a reasonable doubt?” Robinson, p 563.
The first inquiry is whether the prosecutor’s impeachment of his own witness was unduly offensive to the maintenance of a sound judicial process. FRE 607 allows the party calling a witness to impeach the credibility of the witness called. In Chambers v Mississippi, 410 US 284, 296; 93 S Ct 1038; 35 L Ed 2d 297 (1973), the Supreme Court characterized the "voucher” rule as follows:
"Whatever validity the 'voucher’ rule may have once enjoyed, and apart from whatever usefulness it retains today in the civil trial process, it bears little present relationship to the realities of the criminal process.
"8. The 'voucher’ rule has been condemned as archaic, irrational, and potentially destructive of the truth-gathering process. McCormick, supra, fn 7; Morgan, Basic Problems of Evidence 70-71 (1962); 3A Wigmore, supra, fn 7, § 898, p 661.”
*706In our opinion, the prosecutor’s impeachment of Herrera was not unduly offensive to the maintenance of a sound judicial process.
The second inquiry is whether the error was harmless beyond a reasonable doubt. In the instant case, Penny Giles identified defendant as the person who sexually assaulted her; Penny had known defendant for over three years. Defendant arrived to pick Penny up in a green Ford Maverick. Penny testified that defendant hit her on the head with a beer bottle, then repeatedly assaulted her sexually. Penny required eight stitches in her head and laboratory tests showed that she had had sexual intercourse recently. A green Ford Maverick was found abandoned on the road, and the police recovered a beer bottle, cornstalk, and fabric samples from the car’s interior. The fabric samples contained bloodstains of the same type as Penny’s blood. The beer bottle and cornstalk also contained bloodstains. The evidence against defendant was so overwhelming that all reasonable jurors would have found guilt beyond a reasonable doubt even if Tom Herrera had not been impeached by the prosecution.
Lastly, defendant contends that he is entitled to credit for 244 days that he served in the county jail prior to his conviction. Defendant was incarcerated on an unrelated charge, for which he was sentenced to 5 to 15 years imprisonment on February 13, 1980. Defendant received credit for 165 days served when he was sentenced on the other charge. Defendant is not entitled to credit for the time served prior to February 13, 1980. Brinson v Genesee Circuit Judge, 403 Mich 676; 272 NW2d 513 (1978). Defendant is not entitled to credit for the days served between February 13, 1980, and March 14, 1980, because at this time defendant *707was serving his prison sentence for his prior conviction. People v Monasterski, 105 Mich App 645; 307 NW2d 394 (1981).
Affirmed.