The unfortunate reality is that someone is going to have a monopoly on violence and it's better to have a choice in who. Accountability is tough but possible. Body cameras and the ubiquity of smart phones has made it a lot easier to prove what really happened. These camera records need to be stored and processed by an independent federal agency though. Qualified immunity obviously needs to be dramatically curtailed. Cops should have to live in the neighborhood they patrol whenever possible. Eliminating anyone with the slightest hint of white supremacist leanings from candidacy. There are definitely things that can be done to cutrail the potential abuses of power.