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

NBC News anchor Stone Phillips takes a compelling look into the minds of two of America's most notorious serial killers in this probing documentary that speaks to both Jeffrey Dahmer and David Berkowitz as they serve out sentences for their heinous crimes. In addition to questioning Dahmer about his victims and the murderous instincts that drove him to kill, Phillips also speaks with Dahmer's father to explore the killer's childhood. An additional interview with "Son of Sam" killer Berkowitz explores the prospect that the man who terrorized New York City in the late '70s might have had a secret accomplice in his crimes who may in fact still be at large today.