Gerard John Schaefer deceased law enforcement officer / serial killer dubbed "The Hangman".
 
8 1/2" x 11" two page letter hand dated June 3, 1995 with excellent crime content, a lot of talk about women and their bowel movements. 

Hand signed with a moniker at the close, Sex Beast.
 
Includes the top portion of the original prison stamped envelope postmarked June 5, 1995. Schaefer has affixed his return address sticker on the left.