I think the movie depicted an on going crisis in America. This whole debate on whether racism still exist or not is a crock. Racism on both sides still exist. As a black man raising a son I have explained to him how to handle himself around police. Live to tell your story.
There are bad cops just like there are bad people. There are good cops just like there are good people and when you have this kind of matrix bad cops and good people will mix at some point. I think the movie showed a side of society that exist far to frequent. What it does not show is how often are white men/women shot by police in comparison. The results may shock you.