" My one cardinal rule of prison interviews is never to go into the encounter unprepared. I also made a practice of not going in with notes, because that could create an artificial distance or filter between the subject and me when the time came to really bore in and search for the deepest layer of his psyche. "

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