Gary Michael Heidnik an American murderer who kidnapped, tortured and raped six women who he kept as sex slaves in his basement at 3520 North Marshall Street in Philadelphia, Pennsylvania. He was convicted of killing two of the women he held captive. Heidnik was executed by the State of Pennsylvania on July 6, 1999. 

Letter from death row dated July 18, 1994, hand signed at the top, Sir Gary M. Heidnik, with his return address. 
Heidnik has also drawn a doodle along the top, interesting content! Hand signed again at the close, Anon Gary.