Or indeed from a policeman standing by a car window. The method is not so important. They key thing is that the police are permitted to deal death swiftly where

Or indeed from a policeman standing by a car window. The method is not so important. They key thing is that the police are permitted to deal death swiftly whereever they feel the slightest or the largest degree of threat. He was a "bad guy", and we know from the movies that justifies instant death by the good guys.