There is no evidence of any sexual activity with any of the victims, yet psychologists suppose that the penetration of the victims with a knife and "leaving them on display in sexually degrading positions with the wounds exposed" indicates that the perpetrator derived sexual pleasure from the attacks.
Non se atoparon probas de ningunha actividade sexual con ningunha das vítimas, mais algúns psicólogos deduciron que a penetración das vítimas cun coitelo e a forma na que as deixaron expostas en posicións degradantes indicaba que o perpetrador obtivo pracer sexual dos ataques.