The previous generation Explorer was sold as a police vehicle:
https://www.fleet.ford.com/showroom/specialty_vehicles/Police.asp
https://www.fleet.ford.com/showroom/2009fleetshowroom/2009-explorerssv.asp
These police Explorers are all over the place. ..
http://www.google.com/images?expIds=17259,23756,24692,24878,24879,25458,25651,25774,25901&sugexp=ldymls&xhr=t&q=ford%20explorer%20police&cp=17&hl=en&um=1&ie=UTF-8&source=og&sa=N&tab=wi&biw=1024&bih=602
It's nothing new.