Good read:

https://www.lewrockwell.com/2015/04/no_author/killing-for-the-sake-of-it/

excerpt:

As empires collapse, they turn inward, and subject their own populations to the same ill treatment to which they subjected others. Here, America is unexceptional: the number of Americans being murdered by their own police, with minimal repercussions for those doing the killing, is quite stunning. When Americans wonder who their enemy really is, they need look no further.