People think they have all their constitutional rights in all criminal cases. The truth is scary. People who have been accused of murder have more rights than those accused of Drunk Driving. We in the drunk driving defense community call this the DWI exception or exceptions to the Constitution.
One of my mentors, a founding father of the NCDD (National College of DUI Defense) and a great DUI attorney from California, Lawrence Taylor put it best in his talk which details this erosion of our rights:
Know that what rights you do have need to be preserved early and demanded in Court!