On Aug. 21, the South Dakota Supreme Court has ruled that the state's DUI implied consent law was unconstitutional. Without explicit consent of a drunk driver, police must get a warrant to determine the blood alcohol content, unless exigent circumstances exist. The Legislature will have to revise DUI statutes as a result. This ruling and South Dakota's DUI prevention practices are of particular interest to us, since our 25-year-old daughter, Maegan Elizabeth Spindler, was killed by an allegedly drunk driver on July 8, 2013, along with Dr. Robert Klumb in Pickstown. Ronald R.