Great thread. In New Hampshire, until recently literally every state government car (whether it be city cops, state police, or the highway department) had a liscence plate that started with a capitol "G", presumably for "government." Well, that's changed, as now the local cops plates start with an MP that is horizontal on the plates like this:
____________________________
M
--OTHER LETTERS
P
____________________________
They started doing this around the same time that they started getting rid of the old crown vics and buying newer Ford models. The staties often drive Chevy Malibu's in NH.
(Funny story, when I first started seeing these MP plates, I was really paranoid about the end of the world, 2012, the US building FEMA (concentration) camps and all that, I thought it stood for "Military Police". I was really confused, thinking what else could it stand for? I had to go to the police station one day to get a copy of my CCW liscense and I asked the cop at the front desk would MP stood for, and she replied "Military Police". I looked at her funny and said "Why would the Cheif of Little Shit Town, NH drive a military police car?" She didn't know and asked another cop who replied, "No, it stands for "Municipal". )
Across the border into Massachusetts I've been fucked by a guy driving a Jeep Cherokee who was posing as the drug runner I was supposed to be meeting! Southern NH and MA also work together with task forces, to combat the severe narcotic epidemic in this area. Those guys could be driving anything. Just my input.