This is yet one more of the hidden costs of the Afghan and Iraq wars. You have a large population of soldiers, many who come back home after their tours of duty, where they were in effect an occupying force. And then they get a job in law enforcement. They are used too a certain way of doing things in Iraq and Afghanistan, and they bring that culture home with them. Even for those who didn't serve, as the article not…
Bill Lind has written extensively on this topic.