David Berkowitz is an American serial killer dubbed the Son of Sam and the .44 Caliber Killer. Berkowitz pled guilty to 8 shootings and is serving life in prison.
 
Two page type letter dated March 9, 2012 and hand signed at the close, David.

Includes a 2012 calendar from the Son of Sam along with the original prison stamped envelope postmarked March 2012 with his typed name and return address appearing on both sides of the envelope.