NBC News Presents: Inside Evil - Serial Killers Jeffrey Dahmer & Son of Sam

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In "Inside Evil: Jeffrey Dahmer," Dateline NBC anchor Stone Phillips confronts Dahmer on-camera, in a prison interview about the victims he killed and cannibalized -- and the urges that drove him. In a rare interview with Dahmer's father, Phillips examines events in Dahmer's childhood that could have pushed him to murder. It's a compelling portrait of a killer and the demons deep down inside him. In "Inside Evil: Son Of Sam," NBC News investigates the infamous serial murder case that terrorized New York City in 1977: did killer David Berkowitz have help in his crime spree, and could other murderers still be at large? Here, in rare video, "Son of Sam" speaks for himself on camera - and makes startling charges about who may really be behind some the crimes.