A lot of city police cars in several places I have seen lately have a sign on the back that I believe tells the entire tale of all these raids.
"This Car paid for by Dug Money": (or something very similar)
When it became legal for police departments to utilize the assets gained by drug raids etc, we started hearing about this. Drug seized assets, ie: houses, cars , cash etc, should NOT be avaliable to local police departments. That breads greed and greed breads corruption.