Also, the weird controls on the left could have been for anything... lights, radio, you name it. Most of that stuff, even in modern cop cars that I've worked on was almost always half-assed weirdo aftermarket stuff. The shops they had that installed them usually did a poor job. Again... because a lot of police departments don't want to spend the money.
They probably removed the lights and the radio if it was there. Most decommissioned vehicles that I've come across tend to leave the spotlights intact; but you never know...