Whilst I agree that 127 shots fired is obscene, you as someone who was in law enforcement will know that when you draw your gun, youre instructed that you must be prepared to kill. You must not shoot to maim or injure. When a shooting happens in this country, a lot of people say "Why didnt you just shoot once" "Why did all 4 officers need to fire".
When several shots, from several officers are fired, this indicates that the situation warranted such action and is much easier to defend to whoever they report to following a shooting.
The Media in the US, love to drum up this sort of fear. This fear, as highlighted by the racial implications, drives the public to hate the police and the police to become more fearful whilst on general duties. Youve got police on a hair trigger over there. The public torn. Its going to erupt.
The US gun issue is never going to be solved when their media is so dependent on fear and violence.