There are reasons for or against EV's - but even the EV proponents acknowledge that the biggest benefit is you can charge your car for cheap at home or work while its sitting.
An EV makes zero sense for a police vehicle being used all day. The officer can fuel his cruiser in 5 minutes. Even a fast charger is going to take what - 45 minutes at best.
Solution in search of a problem, IMHO.
Lately, it feels like I've been seeing a lot of things done just for show (ex: reusable bags, bad recycling programs)
Many in my area drive EVs because they feel it's better of the environment.
Many also have a negative image of the police.
Buying a few would be an easy sell to help improve image.
"be visible to the public" was a line used in a promotional video I recently heard