Of course those "secret police" cars are always a dead giveaway.

Ford Crown-Victorias and before that it used to be the Chevrolet Caprice (before the blockheads at Chevrolet decided to discontinue them). Who else drives those damned beasts? [Linked Image]

Now if the undercovers were tooling around in little Zastavas (Yugos) or Chevrolet Altos (two cool little cars you can't get here in USA [Linked Image] )....we'd have something going here.

Then again...considering the trends here in the USA, if they want to blend in, they'll have to pull out the big 4x4 trucks!!!