John Wayne Gacy executed by the State of Illinois on May 10, 1994.
Front portion of an original mailing envelope which was returned to Gacy and on which he typed a note before returning it to the original intended recipient. Gacy has hand dated the front of the envelope 1-23-91 and someone else, most likely the prison mailroom has written his cell location near his return address.
The envelope has three postmarked. Twice from Menard, Illinois January 1991 and postmarked once North Suburban, IL.