- Born
- Died
- Nickname
- Johnny
- John Butkovich was born on September 16, 1956 in Nova Kapela, Croatia. He died on July 31, 1975 in Cook County, Illinois, USA.
- Parents
- One week after the attempted assault of Antonucci, on July 31, 1975, another of Gacy's employees, an 18-year-old from Lombard, John Butkovich, disappeared. Butkovich's car was found parked near the corner of Sheridan and Lawrence with his jacket and wallet inside and the keys still in the ignition.
- Son of Marko Butkovich (1928-1998).
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