John Szyc was a 19-year-old white male who disappeared after failing to show up for work and was later identified among the victims of John Wayne Gacy. He died on January 20, 1977, in Norwood Park Township, Cook County, Illinois; his remains were recovered from beneath the crawl space of Gacy’s home and later identified by dental records.

A high school ring belonging to Szyc was recovered in Gacy’s house and was cited as evidence connecting him to Gacy. Szyc had recently moved to Chicago before his disappearance. The investigation into his death was part of the larger probe that uncovered multiple victims at Gacy’s residence.