"In an unmarked car, the policeman was allegedly attempting to park without using his blinker at a green light. (His reverse lights weren't on. Likely double parked without hazards on.) The Uber driver pulled around and gestured that he should use his blinker, casually and non-offensively, and kept driving us. The policeman quickly pulls up behind us and this is what happens..." "This occurred just before 2pm on the West side of Manhattan, in police precinct 6, on March 30th, 2015. The officer did not identify himself, but he had a New York license plate: GSS 8891..."
P.S. The New York Daily News has identified the police officer as Patrick Cherry.