Late last Sunday afternoon I was northbound on Fredericksburg, on the Loop 410 overpass, when I spotted two stopped vehicles -- one of them, a new black Ford Mustang fastback with blue and red lights across the interior sides of the windshield and rear window flashing.
Sharing this in case you regularly transit Balcones Heights. If the PD can afford toys like this one, they must be "raking in" huge revenue on traffic citations.