The maniac who was gunned down by New York’s Finest after trying to bust into a Brooklyn precinct and slashing a hero cop in the face was a 36-year-old nut with a rap sheet.

Justin Coleman, who was last busted on MacDougal Street in April 2024 and charged with assault, was pronounced dead on arrival at Brookdale Hospital following the shocking Sunday morning incident , law enforcement sources told The Post.

Police said the suspect tried to get into the NYPD’s 73rd Precinct stationhouse in Brownsville through a back door shortly before 5:30 a.m. — and tried to slash a female cop’s throat when she confronted him. 4

The unnamed officer was instead cut in the face, with her attacker then running off with cops on his tail.

Police caught up with him outside a housing project about two

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