dont work for them however i have arrested a few shoplifters for my local co.
they work on if its a deter then its a deter but if their going for it then so are you, so in other words if you can deter someone then do so but if they want the theft your having an arrest.
dont know whats on paper though thats just how things work when i catch someone for them.
usually ends up in a niht in the cell for my detain and a bottle coming my way for my efforts
hope this helps