In this consolidated appeal, we treat two separate criminal cases against defendant. In the first case, defendant claims the trial court abused its discretion in refusing to allow him to withdraw his plea of guilty to forcible sex abuse. In the second case, a jury found defendant guilty of sodomy on a child. Defendant claims four errors in the second trial. He alleges that the trial court (1) improperly admitted evidence of his guilty plea in the first case, thus depriving him of a fair trial, (2) erred in denying his motion for a new trial based on the State’s alleged failure to comply fully with discovery requests and the State’s misrepresentation of facts, (3) abused its discretion when it refused to admit evidence of the victim’s mother’s mental health and financial circumstances, and (4) allowed him to be convicted on insufficient evidence. We treat the cases separately and affirm both convictions.
I. Withdrawal of the Guilty Plea
In the first case, S., a fourteen-year-old boy who lived at defendant’s home as a foster child, accused defendant of sexual *424 misconduct. The State charged defendant with four counts of forcible sex abuse and one count of sodomy. Defendant confessed to sexual contact with S. and, on the advice of his attorney, pleaded guilty to one count of forcible sexual abuse on May 31,1985, in the belief that he would receive leniency because of his clean record.
Around the same time, S. escaped from juvenile detention. While defendant was on release pending sentencing, a jury convicted him of sodomy on the child in the second case. After the second trial, defendant presented the judge in the first case with a letter purportedly from S. According to defendant, S., who was still a fugitive from the authorities, had a notarized, certified letter mailed to defendant’s attorney. In the letter S. claimed that he not only consented to the sexual contact with defendant but also initiated it and “coerced” defendant into it. The trial judge, however, expressed concern over the authenticity of the letter.
Utah Code Ann. § 77-13-6 (1982) provides: “A plea of guilty ... may be withdrawn only upon good cause shown and with leave of court.” We will not interfere with a trial judge’s determination that a defendant has failed to show good cause unless it clearly appears that the trial judge abused his discretion.
State v. Forsyth,
Because of the implausible timing and suspicious content of the letter, we find no abuse of discretion by the trial judge. Furthermore, allowing withdrawal of the plea would greatly prejudice the State. With only a letter purportedly written by the victim, but without the victim himself, the State lacks any evidence to retry defendant. 1 The trial court was within its discretion in deciding that defendant failed to show good cause for withdrawal of the plea.
II. Errors in the Second Case
The acts for which defendant was charged in the second case occurred while defendant was on post-trial release after the first case. A., a twelve-year-old boy who had been close friends with defendant for two years, testified that defendant forcibly sexually abused him on June 29, sodomized him on July 6, and committed object rape on him on July 17. Defendant was not charged with the latter act, and the jury found him not guilty of the June 29 act.
At trial for the sodomy charge, defendant attempted to show that A.’s mother induced A. to fabricate charges against defendant, using her alleged knowledge of the charges in the first case to create the *425 charges brought by A. In order to support this theory, defendant testified about the first case and his guilty plea.
We reject defendant’s claim of prejudice regarding the introduction of evidence of the guilty plea for several reasons. First, by not raising it at trial, defendant failed to properly preserve the issue for appeal.
State v. Gray,
Next, defendant contends that the trial court erred in not granting a new trial based on the State’s failure to disclose rebuttal testimony and its use of allegedly perjured testimony. The testimony at issue was offered as rebuttal to defendant’s alibi and alibi witnesses for the night of July 6, when a city-wide power outage occurred. The alibi witnesses established the time defendant allegedly returned from taking A. home by estimating when power was restored to their residence. The prosecutor introduced rebuttal witnesses from the police and the power company to indicate that the time power was restored in the area differed substantially from the alibi witnesses’ estimates. Defendant asserts that the rebuttal evidence was improper because the prosecutor did not inform defendant of the expected content prior to trial.
On appeal, defendant has submitted new evidence that contrary to the implication of their testimony, neither the police nor the power company can be certain as to the time power was restored to his residence. However, defendant has not shown that the State knowingly used false testimony or that witnesses made statements with the belief that they were not true. Nor has defendant shown a reasonable likelihood that the testimony could have substantially affected the verdict, particularly since there was corroborating testimony from witnesses about the victim’s whereabouts on the night in question.
State v. Schreuder,
Defendant also cites as error the trial judge’s refusal to allow defendant to introduce possible motives for the mother’s fabrication of charges against him. Defendant claimed that A.’s mother concocted the charges to avoid paying defendant a $300 debt she owed him. He also asserted that she had fabricated the charges because of mental illness, and he attempted to have her mental health records introduced into evidence. We will not reverse a ruling on admissibility unless the ruling created a likelihood of injustice.
State v. Royball,
Finally, we examine whether there was sufficient evidence to support the verdict. In reviewing a jury decision, we must
*426
examine the evidence in the light most favorable to the verdict.
State v. McCardell,
[T]he only means of determining the question of guilt or innocence was by deciding whether the victim or the appellant was telling the truth. The jury obviously believed beyond a reasonable doubt that the victim’s testimony was true, and there is no basis for our overturning that verdict.
State v. Miller,
Defendant’s convictions are affirmed.
Notes
. This case is different from
State v. Gallegos,
