A postal worker is suing the city after he says he was arrested for telling a police officer driving an unmarked car to "slow down" in Crown Heights. 

Glenn Grays, 27, has filed a lawsuit against the NYPD, claiming his on camera arrest traumatized him so badly that he was unable to return to work until last week. He says he is still suffering from anxiety.

Grays says he was wearing his uniform and delivering packages in Crown Heights when a car sped by him on March 17.

Grays' lawyer says the police violated his client's civil rights while he was trying to do his job. 

Borough President Eric Adams criticized the NYPD calling an end to "cowboy policing."

Grays' lawyer says he wants to take the case to the supreme court in Kings County. 

Cellphone video taken at the scene shows Grays being taken into custody after he shouted at the driver of the vehicle to slow down; the driver turned out to be an undercover cop.

Grays was later charged for being disorderly and resisting arrest, however, police later dropped the charges and the police lieutenant who oversaw the arrest was stripped of his gun and badge, according to the NYPD.