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. 

Prison issued mailing envelope postmarked July 25, 1989, hand signed, Gary M. Heidnik.

Gary Heidnik Signed Prison Envelope


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