All I can say is were is the common sense? They let this guy carry a gun? He couldn’t discern the fact that a person running 2 red lights and pulling into an ER Parking lot was maybe needed Emergency Medical Care? Anyone who would defend that lack of reasoning of Officer Davis's part deserves to have him patrolling your street. As for Justification, You can do almost anything to save the life of a fellow human. To protect the life of a 3rd person, you can even use deadly force, so why wouldn’t he be allowed to speed and run red lights to Save a Human Life?
This officer is lucky all he is getting is his 15 minutes of Shame, if I lived in Chattanooga, I would call for demonstrations and even calls to the Mayor demanding the Chief of Police resign over this incident. This is clearly a Top Down issue, where officers are not instructed on Common Sense.