Subway knife vic ex-NYPD big

The straphanger menaced by a knife-wielding man hissing, “I’ll take your head off your f--king neck!” was a former top NYPD official, according to ex-Big Apple Police Commissioner Bill Bratton.

“I have a former assistant deputy commissioner who worked for me when I was most recently commissioner,” Bratton — the city’s top cop in the 1990s and again from 2014 to 2016 — told WABC radio in an interview that aired Sunday.

“He was on a Midtown train earlier this week and had an individual come up to him, pull out a knife, and say, ‘I’m going to cut your head off.’

“Fortunately, they’re going to make an arrest,” Bratton said.

On Wednesday, police released surveillance video of the knifewielding man who had allegedly threatened the former assistant deputy NYPD commissioner.

The frightening incident occurred about 3:30 p.m. May 22 on a southbound No. 6 train at the East 77th Street and Lexington Avenue station on the Upper East Side, cops said.

The armed suspect followed his 35-year-old victim into a crowded subway car and became irate as the train left the station, holding a switchblade in plain view, cops said.

“I’m not riding this train pressed up against this door,” the man screamed as he repeatedly flicked his blade in and out in the victim’s direction. “I’ll take your head off your f--king neck!”

When the southbound train arrived at the 68th Street-Lexington Avenue station, the suspect fled, the NYPD said.

The Post — which confirmed Sunday that Bratton was referencing the same incident — is withholding the identity of the victim because the former official said he fears retribution from the suspect.

The foul-mouthed suspect, Aaron Ramos, turned himself in to cops Thursday morning. Ramos, a 26-year-old Bronx resident, was charged with menacing, according to police.