Dennis Lynn Rader Wichita, Kansas Bind Torture Killer serial murderer aka "BTK" who was captured in 2005, three decades after his killing spree began.

 
Six page handwritten letter written in January 2006.
He has hand signed BTK at least once inside this letter. 
Hand signed at the close, Dennis.
Includes the original mailing envelope hand signed, Dennis L. Rader.