David Berkowitz serial killer dubbed the Son of Sam.

8 1/2" x 11" one page letter dated October 15, 1991, hand signed at the close, David. 

Includes three newspaper articles, one on which Berkowitz has handwritten the date and publication at the top.

Includes the original prison stamped envelope with 8 lines of handwritten address by Berkowitz and hand signed, David Berkowitz.