New video has surfaced showing the moment an off-duty police officer shot and killed a 37-year-old man in an apparent road rage incident in Brooklyn this week.

Officer Wayne Isaacs, a three-year veteran of the force, fired two shots at Delrawn Small in East New York early Monday morning. Small, who was in a car with his girlfriend and two young children, apparently became enraged when he thought Isaacs, who was in an unmarked car, cut him off. He got out of his car at Atlantic Avenue and Bradford Street and approached Isaacs' window, whereupon he was shot. You can see the surveillance video below:

The video shows Small nearly instantly falling back after he approaches Isaacs; this contradicts an earlier report in the Post in which a witness claimed he had video that showed Small repeatedly punching Isaacs before the officer shot him. "Now that I saw that video, I’m outraged," Small’s brother, Victor Dempsey, said at a press conference Friday night. "It’s time for us to get justice on it. Everything they told us from the very ­beginning is a lie."

Isaacs, who was heading home after finishing his shift, apparently thought he was being carjacked when Small approached his car, and used his service weapon to shoot him once in the head and the chest. The Small family attorney, Roger Wareham, told the Post that the video paints a picture of the shooting as a "cold-blooded murder." "From what it shows, there was no threat to the cop. Deadly force was not justified," he said. "Delrawn looks in, then he’s falling down, in an instant."

Small's girlfriend, Zaquanna Albert, reportedly told authorities he had a "hair-trigger temper" and had "rebuffed her when she begged him not to get out of his car." The video shows her running out of the car after him after he was shot.

Isaacs has been put on administrative duty, and the Attorney General's office is investigating the incident. "I am committed to conducting a full, fair and independent investigation of this tragedy, and will follow the facts and evidence—including this video evidence—wherever they lead," Attorney General Eric Schneiderman said in a statement.