Thought I'd post this since it came up in a GD thread about unmarked coppers... so here you go (try to keep it to real cop cars, not video games or concepts):
Why you don't speed in Germany:

And for all the LEOs on here, the Carbon Motors E7 (Said to replace the Crown Vic as the premiere interception and cruiser vehicle):

More pics: http://www.cars-show.org/cars/new-police-car.html