In the past week on 3 separate occasions I have seen an unmarked Naperville Police Department Dodge Magnum. The first time I saw this car was back in May, I was under the impression that it was a seizure and they were having some fun.
Monday 12/29: NPD Magnum responding to a truck hitting a house on Rollingridge and Junebreeze (6pm).
Tuesday 12/30: NPD Magnum is parked running 35.5, then shoots me with laser on Washington and 12th (2pm)
Monday 1/5: NPD Magnum is moving northbound on River Rd by the train tracks, this time it is 34.4 (5pm).
Unlike I previously thought, based on the different Ka frequency it appears there are at least 2 unmarked Magnums in Naperville, and they're all over the city, whereas normally police seem to be focused around downtown.
They are 100% stock looking besides the light on the a-pillar, they even have passenger plates where normal NPD cars have MP plates. One is dark blue, the other one is also dark.
It seems like there were a couple people on the forums from the area, post up your sightings.