The source article says that he was charged with aggravated assault on an officer, so I suspect he tried to hit a cop with the hearse, or at least gave the cop reason to think he was trying.
30 posted on 12/19/2008 10:32:45 AM PST by Mr. Silverback
("[Palin] has not even lived in the Lower 48 since 1987. Come on! Really!" --Polybius)