The injured officer was hit in the face by a brick as protesters swarmed the streets of a Brooklyn neighborhood Wednesday night, the New York Post reported.
The violence began after Kimani's parents did not show up at a 7 p.m. vigil for their son. As many as 200 protesters took part in the disturbance.
Mahnefah Gray, the sister of Kimani Gray, the 16-year-old boy shot and killed by officers Saturday, was among those arrested.
Officers said Kimani was shot after he pointed a loaded pistol at two officers.
An autopsy found the teen, who the Post said was reputed to have been a gang member, had been shot in the front and back by a total of seven bullets, indicating he was facing the officers when the shooting began.