Right. The true story is that TK826 thought the mystery Monaco could be a "Rocklin County, CA" police car, and Steam found an old photo of a Rocklin County car and posted it just for reference showing the star.
The joking story is: Steam said that it was Dan Aykroyd on the right.
I'm continuing the joking story by saying that Steam posted a fake photo. Here is the original, clearly showing that Dan and John were scouting Rocklin County for the prototype blumo: