“You know, everybody talks about gangsters, crime and stuff like that. But, as a writer, I’m really curious [about] what goes on in somebody’s mind. You can talk about the act in the abstract, but when you deal with it in actuality, how does a person make that adjustment in their mind and go home at night and play with his kids and be with his wife? That curiosity, as a writer, led me to do a lot of research on killers and their methods, that sort of thing.”