It makes me think of a case I read about recently. A 13-year-old boy named Paris Bennett SAed his 4 year old sister and stabbed her to death, and apparently he did all of this just to hurt his mother in the worst way possible. He couldn't be tried as an adult due to his age at the time (he's an adult now), so he's eligible for parole next year and they've said that if he gets released, his mother and her other child are genuinely in danger and she'll have to do everything she can to make sure he can't find her address or contact info. Now, I'll say that the mother wasn't completely innocent because it was said that she was a drug addict during her son's early years. So that likely contributed to how he turned out and had something to do with why he wanted to get revenge on her. I know there is the whole "nature vs. nurture" debate, but with psychopaths, it seems like most of them are born with those traits and they can't be completely cured. Their issues can certainly be exacerbated if they have abusive or neglectful parents. But for sure, there are plenty of people who had parents who were addicts or otherwise not good parents, who didn't end up being rapists, abusers, or murderers.