I know of an instance where a state cop let an officer from a small town within the state go even though the town cop was DUI.
I was recently tailgated by a cop while driving right at the speed limit.
I’ve been stopped for no more reason than I was driving a new car. “Whut yew got in that trunk, son?” My wife and I ended up standing on the side of the road in our sock feet while the cop called in another car and the three of them tossed our luggage. (Two of the cops did the actual rifling though our belongings; one cop just stood there and kept a close eye on us during the search.)
This was in Mississippi.
I and my wife are both lily-white, BTW.