Can prior bad acts evidence be admitted to prove intent in sexual abuse cases? State v. Shay Explained

In State v. Shay, the Utah Court of Appeals addressed whether trial courts may admit prior bad acts evidence under Utah Rule of Evidence 404(b) to prove a defendant’s intent in sexual abuse cases. The court’s decision provides important guidance on the proper application of rule 404(b) and the required rule 403 balancing test.

Background and Facts
Raymond Shay was convicted of seven counts of aggravated sexual abuse of a child and one count of rape involving his stepdaughters Beth and Clara. The State sought to introduce testimony from Ashley, another stepdaughter who had previously accused Shay of sexual abuse. The trial court admitted Ashley’s testimony under rule 404(b) to show Shay’s intent and common plan or scheme, over Shay’s objection.

Key Legal Issues
The central issue was whether the trial court abused its discretion in admitting Ashley’s testimony under rule 404(b). Shay argued the evidence was improper character evidence designed to show he acted in conformity with a propensity to commit sexual crimes. The State contended the evidence served proper non-character purposes of proving intent and showing a common scheme.

Court’s Analysis and Holding
The court of appeals affirmed, applying the three-part test for rule 404(b) evidence: (1) relevance, (2) proper non-character purpose, and (3) probative value not substantially outweighed by unfair prejudice. The court found Ashley’s testimony relevant to proving Shay’s specific intent to arouse or gratify his sexual desire, citing State v. Bair. The evidence showed Shay targeted minor stepdaughters, exploited his parental role, and relied on secrecy—all supporting the inference of sexual intent rather than accident or mistake.

Practice Implications
This decision reinforces that trial courts have wide discretion in rule 403 balancing determinations. The court emphasized the importance of limiting instructions that specify the proper purposes for considering prior bad acts evidence. Even if Ashley’s testimony was improperly admitted, the court found any error harmless given the detailed, consistent testimony from Beth and Clara, corroboration from their mother, and Shay’s minimal defense presentation.