I saw this on a local show "Pinellas ER" they were using the unmarked Blue Dodge Dakota. The officer said that he can not "legally" persue anyone in an unmarked car unless it is for a felony. If you commit a felony then you can be chased. Most likely the cop will pursue you untill a marked unit joins. The show was funny because i saw a ricer out run the Dodge truck in a 90 integra down on US19 in St pete.