His story raises goosebumps and reminds us of the dark side of the human psyche. Until his murder while in prison, Jeffrey Dahmer was hounded by the media, who sought to understand his depravity. While his motivations may be long buried, Dahmer is a continued source of fascination. American Justice: Dahmer -- Mystery of a Serial Killer explores the investigation that took too long and the man eventually caught in its web. Dahmer murdered 16 boys, often cannibalizing the bodies. Some family members think he left a trail a mile wide. But the FBI defends the procedures used in the case. Robert Ressler adds an expert opinion on the nature of serial killers. ~ Sarah Ing, Rovi