This cop is battling demons.

A retired NYPD officer turned “demonologist” is breaking his silence about the bone-chilling warning that forced him and his former FDNY EMT wife to take a year-long hiatus from slaying the supernatural — and revealing why they think they’re safe to fight evil again.

Chris and Harmony DeFlorio committed their lives to chasing demons and other paranormal baddies around the world after leaving their city jobs. Chris, 54, retired after 20 years at the 32nd Precinct in Harlem. Harmony, 49, left the Emergency Medical Service following a lupus diagnosis. 4

For the last four years, they say, they’ve investigated nearly a thousand cases free of charge.

But last year, two sinister figures that first appeared in Florio’s dreams half a decade ago returned — and

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