No one gets closer to evil than a criminal profiler, trained to penetrate the hearts and minds of society's most vicious psychopaths. And no one is a more towering figure in the world of criminal profilers than Roger L. Depue. Chief of the FBI Behavioral Science Unit at a time when its innovative work first came to prominence, he headed a renowned team of mind hunters that included John Douglas, Robert Ressler, and Roy Hazelwood. In a subbasement sixty feet under the Academy gun vault in Quantico, he broke new ground with analytical techniques and training programs that are still used today. After retiring from the FBI, he founded an elite forensics group that consulted on high-profile cases, including the Martha Moxley and JonBenet Ramsey murders, and the Columbine school shootings.