Dennis Raider
From 1974 to 1991, Dennis Raider killed ten people in Wichita, Kansas. BTK stands for “Bind, Torture, Kill.”, which he used to address letters to police officers. He stalked his targets before entering their homes to bind their legs and choke them. After disappearing in 1988, he reappeared in 2005 thanks to a floppy disk sent to the media, which led to his arrest.
According to the killer, he murdered animals as a child and fantasized about bondage as a child. Rader admitted to his crimes and is serving ten consecutive life sentences, with the earliest release date set for February 26, 2180.
