The wonders of video. Rest assured, had there not been a security cam, all you said would have come to pass.
Security cam video, dozens of witnesses, etc., certainly haven't been a bar to families bitching about how lil' Johnny Thuglife shouldn't have had his life ended just because he was pointing (or shooting) a gun at someone, and that the person who gunned him down in cold blood needs to be punished because, you know, Bureau of Land Management...