The recent United State Supreme Court decision in the case of Birchfield v. North Dakota, may have an impact on your case, depending on the circumstances. That case involved a man who refused to submit to a blood test to determine his blood alcohol concentration. At the time, as in many states, North Dakota law made it illegal to refuse a blood draw. The law said that by driving on state roads the driver implied consent for the taking of a blood sample. The Supreme Court overturned these laws. It said that a blood test is so invasive that it requires express consent or a warrant.