Heres a quick pic of my police RV:
Police Department RV
The miniature is a Quick Reaction Force Soviet WW2 armoured scout car and is armed with a HMG to deal with serious criminal types such as Slippery Jim. I plan on buying another one and converting it slightly to be equipped with a Rogue Trader heavy webber (essentially the perfect crowd control weapon which fires lots of sticky netting that traps lawless types and makes it fairly simple to capture them)
I also have a street police squad underway which will nearly complete my police department and allow me to get on with some more Rdenrunt villainy and Freibur frontier dwellers.
All the best!