[loveyourmother]

There were ~940 people killed by police last year in the US. ~46 Police were killed (by an attacker) in the line of duty. I wonder how these numbers compare to those countries you mention. If you are constantly facing a more violent threat then it only makes sense you would be responding more violently. I don't know the break down of how many of these incidents involved arbitrary emptying of clips but I would guess the number is very small.