Check the VIN number on the fords for a "P" code. "A38" on the chryslers, depending on year. Look for evidence of emergency equipment such as holes in the roof or the a pillar for a spotlight. Holes...
it all depends!some are Chevy caprice,ford crown Victoria,some places have unmarked cars that are ford mustangs,dodge chargers,Chevy cameros.some other places have jeeps,dodge durangos,ford explorers...