The deranged teen had racked a round into his weapon’s chamber moments earlier, according to chilling surveillance footage obtained by The Post.
Police are investigating whether the gunman knew cops were in the black Kia SUV when he walked up to it, sources told The Post. The officers were in uniform at the time.
As the two officers got out of the car to try to disarm the suspect, he opened fire, spraying the vehicle with rounds and leaving bullet holes in its front and rear windshields as well as on the passenger side, police said.
Three officers returned fire, but the suspect was not struck, according to police. There appeared to be at least nine bullet casings left on the ground after the gunfire.
Detective Robert L. Karroll was shot in the upper back while wearing a ballistic vest and has minor injuries, police said.