Summary: Renowned psychiatrist Dr. Al Carlisle's captivating inmate tapes with some of America’s most heinous killers helped him discover what drives a seemingly normal person to become obsessed with murder, exhibit violent tendencies and psychopathic behaviors.
Summary: Dr. Carlisle's tapes documenting his 27-year relationship with Manny Cortez reveal the convicted murderer's point of no return when he became unhinged and began his violent spree.
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