Police act on gut feeling. I cannot believe how many people honestly believe that it is fair to judge what a police officer did when you don't have his background, or training, or experience, or limited knowledge of the situation. After the fact, we can all see that the man did not have a gun, but could the police officer? He misjudged the situation, nothing more, nothing less. By taking a magnifying glass to an issue that the police officer only had a 1x zoom on does not a fair case make.
Am I saying that all police violence is just misjudged situations? Absolutely not. I know that there are police officers who will abuse their power, I have seen it. Does that mean that all police officers abuse their power? Absolutely not. The media chooses to comment on things that will produce an outrage.