Police are looking for the hit-and-run driver who struck an NYPD sergeant who was directing traffic in Brooklyn on Sunday. According to law enforcement sources, the officer was directing traffic at Schenectady and Church Avenues in East Flatbush at around 8:30 p.m. on Aug. 31 when the collision occurred. The sergeant, assigned to the 67th Precinct, was struck from behind by a black sedan with orange license plates, authorities said. The sedan then fled the scene. The victim was taken to K...