Dennis Lynn Rader is an American serial killer known as BTK, the BTK Strangler or the BTK Killer. Between 1974 and 1991, BTK killed ten people in Wichita and Park City, Kansas. Rader pleaded guilty and was sentenced to to 10 consecutive life sentences.

8 1/2" x 11" April 2013 calendar created and filled in entirely by BTK which he sent to a longtime friend.

Hand signed at the bottom with his initials, DLR.