A profile of the serial killer Keith Jesperson, whose chilling confession letters to the media and prosecutors were signed off with smiley faces.

The story of Arthur Shawcross, whose bloodthirsty murder spree lasted more than a decade and claimed over a dozen lives.

The crimes of Doug Clark and Carol M Bundy, a cunning pair of lovers-turned-murderers who targeted young girls and sex workers on LA's Sunset Strip in the late 1970s, brutally killing for their own twisted pleasure.

A profile of one of Oregon's most prolific killers, Dayton Leyroy Rogers, who would prowl Molalla's forests to satisfy his lust for violence.

A profile of triple-murderer Richard Roszkowski, who killed his ex-girlfriend Holly Flannery, her nine-year-old daughter Kylie and his former room-mate Thomas Gaudet in September 2006.

A profile of serial killer Cesar Barone, who was sentenced to death for the rape and murder of four women in Oregon in the early 1990s.