Described as the "perfect psychopath," Pedro Rodrigues Filho murdered at least 70 people — 47 of whom were fellow inmates in prison.

Mary Jane Kelly was an enigmatic figure with a mostly unverified story. What was clear, though, was the horrifying nature of her murder.

Though Robert Ben Rhoades is serving a life sentence for three murders, authorities believe that the Truck Stop Killer may have killed as many as 50 women while working as a trucker across America.

Mel Ignatow killed his girlfriend Brenda Sue Schaefer in 1988 and managed to get away with it. Two decades later, however, he met a grisly fate eerily reminiscent of that murder.

An English model who rose to fame in the 1960s fashion world, Pattie Boyd became the wife of two rock stars: George Harrison, then Eric Clapton.

Five people paid $250 a plate for artist Mao Sugiyama's genitals. Unfortunately, the food and legal repercussions made the banquet less than a success.

Before there was the Manson Family, there was Kathleen Maddox – Charles Manson's only family.

In December 1967, Australian Prime Minister Harold Holt vanished while swimming at Cheviot Beach in Victoria. His body has still never been found.

After 779 days of torturing Giuseppe Di Matteo, Mafia boss Giovanni Brusca ordered his men to "get rid of the puppy."

Tom and Eileen Lonergan went on a group scuba diving trip to the Coral Sea in January 1998 — before they were accidentally abandoned and never seen again.