In Wa. State we have all sorts of unmarked for the Highway Patrolman. My favorite to see are the Volvo XC wagons and crossovers. They have not a lick of marking on them. Our unmarked cars even have civilian plates on them.
Troy built 2010 Jeep SRT8, Dings Racing forged 392 stroker, boost reference return style fuel system, Mondello heads & manifold, ARH 1 7/8" LT's, Off road midpipe, stock cat back exhaust, ATI 17% OD pulley, Stage 6 2-step, Fluidyne radiator, PP built Nag1, remote transmission cooler, PP Dom. TC., 6,500 PTCM, Wavetrac rear LSD.