Great idea. Those are likely to be increasing difficult to come by though.
If the police officer felt his life was in danger faced by a much bigger man who had just tried to take his gun away and injured him, then he could claim he was firing in self-defense. I have heard no account of what words were exchanged or why Brown tried to prevent the officer from exiting the patrol car. Why would he take such an aggressive action? What precipitated it? Were there any drugs in Brown's system? Lots of questions, not many answers. I doubt that the police officer was seeking out black teenagers to kill in cold blood on a public street.