I attended a pretty interesting community/police training seminar a few years back. It was pretty clear to me by the end that the training is the problem in law enforcement. The officers are just regular people. It isn't that they aren't trained enough, they put in a ton of hours, it is the heavy focus on the militarization aspect and little on the community service aspect. It definitely helps that in my specific community, most of the officers live where they work, contrary to the norm that Amentep mentioned.