Regarding your comment on "excessive force", I'm reminded of [0] and how the reaction to that in the news has mostly been along the lines: well, the police education in the US doesn't really contain much on how to deescalate situations compared to, e.g., Sweden/EU. Given how "glorified" those cops became for deescalating the situation properly, I'm not sure, whether "excessive force" isn't a very serious and real issue far too often and whether it's just being played down because people aren't used to expecting a different behaviour from cops.

[0] http://nypost.com/2015/04/22/swedish-cops-on-vacation-break-... and