These people are serial killers who were notorious for multiple, gruesome crimes they’d committed in their lifetimes. Some of them had psychological disorders, others had addictions, traumas, and a variety of other crime triggers. Most of their crimes included torturing and killing people, sometimes having sexual intercourse with the victim. They had their nicknames and the corresponding reputation. Let’s get down to the mugshots of some of the terrifying people in the 19th and 20th centuries.