Where the prosecution alleges a tendency defined by reference to a class of persons (e.g., sexual interest in a group of related individuals), a finding of guilt on a single count involving one member of that class is not of itself logically capable of establishing a sexual interest in other members of the class. Findings of guilt against at least two different complainants are generally required before the propensity inference can logically extend to a remaining complainant. Trial judges must expressly direct juries that propensity evidence admitted for a limited purpose (e.g., proving indecency) cannot be used for other purposes (e.g., proving the physical acts occurred).
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