The man had been critically injured in the crash in Hempstead at about 11:20 p.m. on Saturday, Aug. 21.
Rashad Pyfrom, of Hempstead, was pronounced dead on Friday, Aug. 27, according to the Nassau County Police Department.
Police said a 49-year-old man was driving a 2008 Mercury north on Peninsula Boulevard near West Marshall Street when the vehicle struck Pyfrom, who had been crossing west to east.
Police said the driver of the Mercury remained at the scene.
No other injuries were reported.
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