A Boston Police officer opened fire on a vehicle that had just hit another Boston Police officer after fleeing the scene of a drive-by shooting on School Street in Jamaica Plain Friday afternoon. Boston Police Commissioner William Evans spoke at a press conference around 4 p.m. in regards to the incident. Evans said that around 3 p.m. officers came upon a motor vehicle accident on School Street and spoke to the occupants of a minivan, who said the driver of a white Audi fired several rounds at them. "And the Audi took off to Washington Street. The officers went up to Washington Street where they confronted the white vehicle.