I used to write down the addresses or roads down, then travel over to Google Maps
. Then type in the road or address like this (555 Radio Rd, TN) and it will show all the roads in TN with that name on the left. When I get done it has narrowed it down to one place. The next question is whether it is a county or city police. If all the addresses were in a city area then it more than likely the city or if the roads were strung out across the county then it is the county sheriff. Works like a charm when you have that info.
If they use the 10 codes and signal codes then it is law enforcement of some sorts. I cant pick up Greentop Mtn from here.