Dennis Lynn Rader is an American serial killer known as Wichita Kansas' "Bind Torture Kill" aka "BTK" who was convicted of 10 murders which occurred between 1974 and 1991. 

Handmade Christmas card with a letter from Rader penned on the inside and the back of the card.
Hand signed three times. Hand signed on the front and the inside, Dennis.
Hand signed again on the back of the card, D.L. Rader.
 
Includes the original prison stamped mailing envelope postmarked December 11, 2013 which is completely written by BTK and hand signed, Dennis L. Rader.