We had those box cars at the University of Delaware Public Safety (UDPD) where I was a student aid and dispatcher through college, but they were powder blue because the got a "deal" on them
I got to drive one once at the scene of a minor 10-10PI (pedestrian hit) on a rainy night. The officer gave me the keys to move his car around to block off the street. Due to the one-way streets, I had to take the long way around. It was my only time to slide a cop car sideways into an intersection with the 360's on.