A former New York police officer pleaded guilty Wednesday to killing a Lindenhurst man who was riding with him last winter in what authorities called a drunken ride at speeds of more than 100 mph in Valley Stream.

Aaron Cooper, 26, who had been fired in January 2023 from the city’s police department for pulling his gun during a road rage incident, pleaded guilty to second-degree murder in the death of Pablo Rivera, 22 years old, as well as driving while intoxicated. and criminal impersonation in the second degree.

Cooper, a Navy reservist, was showing off his new sports car when he lost control of his 2023 Toyota Supra around 4:30 a.m. on Feb. 10 as it careened east in the westbound lanes of Rosedale Road. , crossing the double yellow lines, crushing according to the authorities.

Rivera died at the scene, authorities said.

The Supra’s data recorder recorded Cooper’s speed at 109 mph seconds before impact, prosecutors said.

He told responding Nassau County police officers that he had come across the accident and was trying to help Rivera, prosecutors said. He also told police he was still a police officer, even though he had been fired.

“This defendant twice attempted to deny his involvement to authorities, first saying that he stopped to help after witnessing the accident and then that he was in the car but not driving,” said Nassau District Attorney Anne Donnelly. “And although he was fired from the NYPD in 2023, Cooper subsequently tried to pose as an active duty member to curry favor.”

First responders took Cooper, also of Lindenhurst, to Mount Sinai South Nassau Hospital for broken ribs. A blood test revealed that his blood alcohol level was. 16%, double the legal limit for intoxication, one hour after the accident.

He faces four to nine years in prison under a plea deal, although prosecutors asked for seven to 12 years behind bars, Donnelly said.

Cooper is due back in court for sentencing on January 6, 2025.