Looking at this in the context of Global Warming; Gacy will be innocent by the end of the year.
There are still eight victims of Gacy whose bodies have not been identified. Since this man lost contact with his family around that time and presumably traveled through the area his family submitted his name as a potential victim. He and six other missing persons have been found not to be among the unidentified victims. The investigation has only identified one more victim.
The man in this story has been living a quiet life for the last forty years blissfully unaware that his parents and siblings thought he was brutally murdered.