Serial killer Peter Tobin has three known victims: but was this depraved killer also responsible for the unsolved Bible John murders of the 1960s?
The newlywed vanished after a night out with a friend.
John Wayne Gacy AKA "The Killer Clown" raped and murdered at least 33—crimes he died for in 1994. These are the rarely-discussed details of his life.
A milkman discovered that the beer kingpin was missing.
Think you know everything about the most infamous serial killers the world has ever produced?
Here's where they go after they're gone for good...