In the mid-1970s, the city of Wichita, Kansas, was gripped by terror as a serial killer began targeting people in their own homes, binding, torturing, and ultimately killing them in pursuit of the thrill. The man behind these gruesome killings was living amongst his victims in the very town he was terrorizing. His name was Dennis Rader, but he would go on to create a murderous alter ego for himself, a brand of his own, BTK. It took over 30 years for authorities to bring him to justice.