Dennis Lynn Rader (born March 9, 1945) is an American serial killer who murdered ten people in Sedgwick County, Kansas between 1974 and 1991. He is also known as the BTK Killer or the BTK Strangler. BTK stands for Bind, Torture, Kill , which was his infamous signature. He sent letters describing the details of the murders to police and local news outlets before his arrest. After a decade-long hiatus, Rader resumed sending letters in 2004, leading to his 2005 arrest and subsequent guilty plea. He is currently serving ten consecutive life sentences at El Dorado Correctional Facility in Kansas. From Wikipedia, the free encyclopedia