" As I told the New Jersey Parole Board in the McGowan case, my cardinal rule is that to understand an artist, you have to view his art. Likewise, with a predator, to understand him, you have to understand his “art,” because that’s what it is to him. "

― John E. Douglas , The Killer Across the Table: Unlocking the Secrets of Serial Killers and Predators with the FBI's Original Mindhunter