They may appear to be as ordinary as your next-door neighbor. In reality they're far from it. Serial Killers possess an unquenchable thirst for murder, performed with a total lack of remorse. Their names are seared into our collective consciousness as symbols unthinkable terror: Ted Bundy, John Wayne Gacy, Jeffrey Dahmer. Their heinous deeds are immortalized by their fearsome nicknames, Zodiac Killer, Green River Murderer and the BTK Strangler...Bind, Torture, Kill. For decades criminologists and forensic scientists have searched for keys to unlock the twisted psyche ...