" But what my colleagues and I have found and have tried desperately to get across to others in the business of correction and forensic psychology is that dangerousness is situational. If you can keep someone in a well-ordered environment where he doesn’t have choices to make, he may be fine. But put him back in the environment in which he did badly before, his behavior can quickly change. "

― John E. Douglas , Mindhunter: Inside the FBI's Elite Serial Crime Unit