State v. Peterson
Annotate this CaseIn the Supreme Court of the State of Montana, defendant Nels Jerry Peterson appealed his conviction on the offense of sexual assault against his eleven-year-old step-granddaughter (Q.H.). The main contention was the District Court’s decision to permit evidence of Peterson’s prior sexual conduct with other young girls under M. R. Evid. 404(b) and 403. The court concluded that some of the evidence may have been admissible for a permissible purpose under Rule 404(b), but the potential for unfair prejudice substantially outweighed its probative value as presented. The details of Peterson’s prior sexual misconduct were not more abhorrent than the current charge. However, the frequency and manner of the State’s references to them throughout the trial risked inducing the jury’s hostility toward Peterson, resulting in unfair prejudice. Further, the State did not meet its burden to show no reasonable possibility that its use of the tainted evidence might have contributed to Peterson’s conviction. Therefore, the court reversed the conviction and remanded the case for a new trial.
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