"Psychopaths have a distorted view of the world. The only feelings that are real are their own. No empathy, no sympathy. Their victims aren't even real people to them; they're vehicles for their power games and for their creativity and for their curiosity. When they kill someone, they're not destroying a person, they're creating something and they want to remember it. The trophies are... souvenirs of their accomplishments," he points out clinically. He looks at Negan. "My father kept detailed notes and drawings of the things he did to people."