There is a long compicated process a Magistrate must complete if the Magistrate feels there is probable cause,,the Magistrate found no probable cause and released her...whats to investigate?? Everyone seems to miss there are 2 sides to this..DUI..can be charged without alcohol...medication or drugs can impair..i bet if you checked the driving record of those that jump to punish the SHP,,you'd find convictions on most..the troopers did their job,,both were let go. Sometimes royality just dont like being treated the same as the non fancy clubbers!