Gary Michael Heidnik an American murderer who kidnapped, tortured and raped six women who he held hostage inside of 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. 

One page handwritten letter with drawing of a light bulb at the top of the page.  Hand signed on the top, "Gary M. Heidnik" with his complete return address. 
Includes the original cut return address portion from the original mailing envelope hand signed, "Gary M. Heidnik , S1398"