Actually, they do in the way you present it. If 1,207 INNOCENT people were killed, then yes, your point has validity. However, police officers are authorized to use lethal force. I would need to know how many times they used lethal force when someone was threatening them in, or threatening others.
I don't disagree that there are some bad cops out there, and I don't disagree that there are some cops that overstep their bounds and use force when unnecessary. But I don't buy any suggestion that there is any systematic abuse of power by police. There are over 750,000 law enforcement personnel in the US.