I don't know at all programing, so I don't know if it is possible to implement that kind of thing BUT:
I was at an event in the past where we have to defend a transportation point "A to B " it was cool to see cops actually in this and watch how civs tried to stop us.
What about a thing that the cops can active when they are 10? They have to transport and escort a vehicle full of dirty money with a tracker seeing buy all rebels
Maximum 1 every server restart
You can spawn it being corporal or +.