Francis Wayne Alexander. Mr. Alexander is believed to have died sometime between 1976 and 1977, but his death was not announced until Monday.
Mr. Alexander moved to Chicago from New York with his wife in 1975, officials said. The couple divorced months later, and Mr. Alexander remained in Chicago.
He lived on Winona Street on the North Side of Chicago, in a neighborhood where Mr. Gacy was known to have targeted other victims, including William Bundy, a 19-year-old construction worker.
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The Sheriff’s Department was aided by a nonprofit organization, the DNA Doe Project, whose all-volunteer staff tries to match unidentified remains with genetic profiles that had been uploaded to an open-source genealogy database.
Using DNA from one of Victim No. 5’s molars, the DNA Doe Project found connections to Mr. Alexander’s family. Detective Moran followed up with research, interviews and further DNA testing before confirming that he had found the identity of the victim.
The confirmed identification of Mr. Alexander leaves five remaining unidentified victims of John Wayne Gacy. The Cook County Sheriff’s Office is actively working to identify those as well.