mary and robert wilkinson had a son. are you suggesting there is a genetic predisposition to killing? it's one factor, along with psychology and socialization. if you have a combination of genetics and a son who grew up without a father searching for his own identity, it could be a stressor. i remember charlie wilkinson, when he was 15, killed a neighbor's cat. how old is charlie wilkinson? mary was pregnant with him when robert died. that's 27 years ago. that makes him roughly the same age robert was when he started killing. [cell phone rings] what do you got for us, girl? i just found the reason why karen foley was lying. what a you doing back here? i told you before, i don't know anything. we know that he burned you, ms. foley. all of the other victims had them, too. we know that you were raped by robert wilkinson, and we know that you have a son because of it. there was another girl here? [sniffles] listen to me. her name... was julie stanton. i promised that her parents would never know what he did to us. because...
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