Detectives on Tuesday were reviewing images from nearly two dozen surveillance cameras as part of a formal investigation into an apparent case of July Fourth road rage in which an off-duty NYPD officer shot and killed a 37-year-old man in Brooklyn, officials said.

The investigation was announced Tuesday by New York State Attorney General Eric T. Schneiderman.

The recordings were found on 23 cameras near the shooting and detectives will turn over their findings to Schneiderman’s office, where his special investigations and prosecutions unit will manage the case.

“The Attorney General has determined that this case falls within the parameters of the Executive Order and has launched a full investigation,” Schneiderman’s office said Tuesday in a statement. It said the investigation will be led by Executive Deputy Attorney General Alvin Bragg, who runs the special investigations unit.

The decision to launch a full probe came after Schneiderman earlier said his staff was in contact with the NYPD, the victim’s family and community leaders. The state’s special investigation unit, empowered last year through an executive order by Gov. Andrew M. Cuomo, looks into cases in which unarmed civilians are killed by police.

The special unit secured a search warrant for the officer’s car and is actively reviewing the case, but Schneiderman’s office declined to say what was found.

The fatal encounter between Officer Wayne Isaacs, 37, of Brooklyn, who had just come off duty, and Delrawn Small occurred early in the morning as both men had stopped their cars at a red light near Atlantic Avenue and Bradford Street in the East New York section, officials said. Police said the source of the traffic dispute was under investigation.

According to police, Small got out of his 2016 Kia, in which his girlfriend and three children remained. He approached Isaacs, in his 2002 Nissan Altima, and began punching the off-duty cop in the head through the car window, investigators said. They said Small apparently believed the cop had cut him off while driving. Isaacs pulled his firearm and shot at Small, who suffered a fatal wound and was pronounced dead the scene, police said.

Isaacs was taken to Jamaica Hospital Medical Center with bruises to his head. An NYPD spokesman said Isaacs’ duty status hadn’t changed as of late Tuesday but that it was standard procedure to place the officer in an administrative assignment while the use of force investigation was underway.

Meanwhile, Small’s friends and family grieved Tuesday. On Facebook, Zaquanna Albert, who said she was Small’s girlfriend, posted, “Words can’t begin to explain. The pain I feel right now. I appreciate all the prayers and well wishes. But my heart aches for this Man and my son who will never remember his Dad and a Great dad he was to my Baby.”

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A law enforcement source said Small had 19 arrests on his record. A check of state prison records showed Small spent time in prison for felony assault, attempted robbery and attempted criminal sale of a controlled substance.