" The interplay between the agent and the violent offender needed to be informal and not overtly structured. What we were looking for was not so much the facts of the case, which were already established, but the motivation, the pre- and post-offense behavior, the victim selection process, and then the big question of why, without being too assertive, directed, or leading—the opposite of what we’d try to do in a suspect interrogation. "

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