It's not the people, it's the policies. And, our brilliant society has created a massive mess (e.g., socially, economically, politically, etc.) and then left that mess for the police to clean up, which is impossible. We have to zoom out past "right" and "wrong" and blaming individuals, and deal with the mess ourselves. We have a broken system, and we have to fix it (i.e., not the police).
This mindset is the crux of the problem. There isn't anything "broken". Right and wrong is never broken. It is only redefined in such a way by academic elites to purport that something is broken. We've had bad economic times in the past and people weren't out assassinating cops. Law and order is pretty straight forward concept, clouding it with bogus statistical economic and social analysis doesn't help.