37-year-old Delron Dempsey punched the officer through his car window after the dispute, in which the cop then shot and killed the man, according to The Daily Beast.
The officer was taken to a local hospital and didn't have any major injuries, while Dempsey got in an argument with was pronounced dead shortly after the fatal shooting, the Associated Press reported.
Dempsey and the officer were stopped at a red light in traffic when the man approached the officer, argued with him and began repeatedly punching the officer in the head.
The physical altercation that Dempsey had started led the officer to defending himself in return by killing Dempsey, according to NBC New York.
The incident is still being held under close investigation.
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