The Thin Blue Line - "America's Most Successful Stop Snitchin' Campaign."

Yep, this.

America's Most Successful Stop Snitchin' Campaign - Reason Magazine:

"The most disturbing aspect of these stories is not that there are bad cops in Kansas City, New York, and Albuquerque. It's not even that other cops covered for them, or that police unions have institutionalized the protection of bad cops. The most disturbing part of these cases is that the cover-up and retaliation extend all the way to the top of the chain of command—and that so far there has been no action, or even condemnation, from the elected officials who are supposed to hold police leaders accountable."