Thanks for your compliment and for reading my post. It's weird with him. He'll say "I have to stop hurting people" then he'll go right out and hurt people again. He says it's genetic, and while there's some evidence for that, he has enough self-control not to murder someone in front of a policeman.
He goes through the typical psycopath phases with everyone. the "love-bombing" infatuation phase, using them, then the final showdown of the "discard" phase of the breakup where he turns on them and hurts them until he needs them again.
I used all of my influence as a friend to try and moderate his behavior, but he does not have normal human emotions. He's happy only when making people suffer.
The last straw for me was when he found this sweet, innocent, religious Mennonite girl online and told me: "She's a good girl. I'm gonna take her virginity and then dump her real easy" I was his landlord, and I threatened to turn him in to his parole officer and kick him out of the building if he contacted her. He didn't. Psychopaths feel no guilt and need to be completely separated from society so they can't harm us anymore.