Between 1974 and 1991, Dennis Raider murdered 10 people in Wichita, Kansas. He even sent letters to police taunting them under his alias name BTK which stood for ‘Bind, Torture, Kill’. His technique was to stalk his victims before breaking into their homes, binding their limbs and finally strangling them. He disappeared in 1988, but remerged in around 2005 when he sent a floppy disc to the press which helped in tracing him. Rader confessed to his crimes and is serving 10 consecutive life sentences with the earliest release date possible on February 26, 2180.