The car Mr. Herisse, 22, is driving rolls down a South Beach street. Shots are heard in the distance as Hialeah police officers try to stop the car. About two blocks later, the car slows to a stop, standing idle for more than a minute. Eight Miami Beach police officers cluster near the driver’s side. Then they unleash a barrage of more than 100 bullets, a volley so startling that the hands of the person recording the scene from his cellphone shake.