Booking photo released by the Sedgwick County, Kansas, Sheriff's Office showing BTK murders suspect Dennis Rader. Thirty-one years after his first suspected murders, Wichita police arrested a man who called himself BTK for "bind, torture, kill" and was believed responsible for 10 gruesome deaths, officials said on Saturday. The suspect, identified as Dennis Rader, 59, was apprehended without incident in Park City, said Lt. Kenneth Landwehr, the Wichita police homicide section commander who leads the investigation.