
An in-depth look at some of the world's most dangerous murderers.

A profile of Richard Roszkowski, the Connecticut triple-murderer who killed his ex-girlfriend, her nine-year-old daughter and another man in a brutal attack in 2006.

In March 2005, the Gardaí recovered human body parts from the Royal Canal in Dublin.

Lonnie David Franklin Jr. is better known by the nickname Grim Sleeper.

Four vicious murders put Mark Hobson at the center of a nationwide manhunt. Criminologists and psychologists try to decode this enigma.