Following up my own comment, it turns out that Wikipedia has a lot of information on this subject. This article seems like a good jumping off point. https://e

Following up my own comment, it turns out that Wikipedia has a lot of information on this subject. This article seems like a good jumping off point. https://en.wikipedia.org/wiki/Law_enforcement_in_the_United_States https://en.wikipedia.org/wiki/Law_enforcement_in_the_United_...