Here is a website of interest to the people of Crystal, Justice for Crystal Cops Alan Watt and Rob Erkenbrack. And if you are planning on coming to the rally on August 5th, this will give you some more background.
And here is a blog post, Ethics in Law Enforcement, written by retired Minneapolis cop Michael Quinn, author of Walking With the Devil, an ethics book for cops, about the situation faced by Sgt. Erkenbrack and Ofc. Watt.