Cop Culture.

Tee shirts seem to be a particularly fecund field to plow under this topic. Police unions are another good source. This tee shirt was the brainchild of the Twin Rivers, CA union. The guy who said New York City Mayor Bill DeBlasio had "blood on his hands" was the union head, I think his name was Patrick Gallagher but it was some Irish name like that.
http://blogs.sacbee.com/crime/archives/2011/10/controversial-t-shirts-puts-twin-rivers-police-department-in-the-spotlight.html