[Lenor]

Dahmer, thought a dog was talking to him, and convincing him to do what he did. He had little to no self esteem or social skills. Therefore, becoming angry with the inability to talk to female's, found a way to get around that whole pesky law of 'consensual' sex.

Charles Manson, used a shit load of LSD on unsuspecting females, to brainwash them into believing he was Gandhi and manipulating them into doing his dirty work for him. While he never killed anyone himself, he sits in prison. for sitting back and letting drugs get him what he wants.

While, I could go on about the several other 'infamous' serial killers. Who baffled the world, and gave parents nightmares. The main thing they had in common, was their mental health.