The state patrol mustangs in georgia had cages in the back seat so they could transport the offender.I have a neighbor who bought one from the GSP years ago and still drives it cage and all.She wont sell it and believe me I have tried.
Interesting.
Usually when the state auctions off police cars the state requires the auction house to remove all police equipment and decals that identify the car as LEO.
Maybe the cage was exempted or overlooked because it was difficult to remove.