Born to Kill?

A profile of Gary Ridgway, the Green River Killer, who conducted a 19-year reign of terror in Washington during the 1980s and 1990s.

A profile of serial killer Edmund Kemper, who targeted female college students. Was his mind twisted by his upbringing in a broken home and his volatile relationship with a domineering mother?

A profile of Richard Ramirez, infamously known as the Night Stalker. Was he schooled in murder during his poor childhood in the tough Texan border town of El Paso, was his mind warped by drugs or was he simply born to kill?

A profile of Donald Gaskins Jr. aka Pee Wee and "the meanest man in America." Those who knew him, leading experts and the daughter he confessed to examine whether the psychopath was born to kill.

A profile of Dennis Nilsen, one of Britain's most prolific serial killers. Was Dennis Nilsen's obsession with death fused during his childhood, or was his instinct to kill hard-wired from birth?

A profile of David Berkowitz, the most notorious killer in New York City's history. Was the Son of Sam driven by demons? Was he wreaking bitter revenge fuelled by mental illness? Was he programmed from birth to be a serial sexual murderer?