The Chicago police department (CPD) said in a statement that DNA submitted to a family tree website earlier in 2026 enabled the FBI to link McInerney to the scene of Gloria's murder. Further DNA, fingerprint and ballistic testing then established that McInerney, a US army veteran who lived around the corner from the girl, had killed her, according to the statement. The Chicago Tribune first reported the identification on Sunday.
Gloria was last seen alive on the morning of 12 November 1960 as she walked from her family's home in the West Englewood neighbourhood to a mass at a nearby church. She never reached the service. Someone abducted her on the way and fatally shot her, and within hours her body was found discarded in a ditch at a forest preserve south-west of Chicago, police said.
Officers secured evidence at the scene including a bullet, her coat and a white communion purse with a prayer book inside. Police also lifted a fingerprint from the strap of the purse. A police-headed taskforce interviewed about 1,300 people in connection with the slaying, among them a dozen individuals given lie-detector tests, with volunteers from local firefighters, Boy Scouts and military veterans joining the search. None of that produced a suspect at the time.
McInerney joined the Chicago police force in 1959 and was about to turn 25 at the time of Gloria's murder, according to his obituary, published after his death on 30 August 2006. He was investigating homicides for the CPD when he retired in 1987, then worked as an investigator for the federal public defender's office in Nevada.
The CPD statement expressed hope the news "brings a measure of closure to all who knew Gloria and her story". "McInerney should have never worn the CPD star," it added. "And it is devastating to accept that he was never identified and held accountable while he was alive."