Also known as The Whitechapel Murderer, this unknown identity terrorized London during 1880’s by committing gruesome murders of at least 11 people, majority of them were prostitutes. After killing the victims he removed their internal organs which led to the speculation that the killer has knowledge of surgical knowledge. The moniker-Jack the Ripper comes from the letters he sent to the media outlets and the police, with the letters consisting of clues to catch him, mocking the police. In the end he was never caught. He is considered to be the first serial killer to draw worldwide media attention.