EAST PITTSBURGH, — A police officer fatally shot a 17-year-old boy just seconds after he fled from a traffic stop late Tuesday in a confrontation captured on video from a nearby home.

Investigators said Wednesday that the car stopped in the town of East Pittsburgh matched the description of a vehicle being sought in a nonfatal shooting in a town a few miles away. An East Pittsburgh officer, who has not been identified, was taking the driver into custody when the two passengers, including 17-year-old Antwon Rose, fled the car.