Do the police in Michigan have to obtain a warrant in order to draw blood from a DUI/OWI suspect? Under Michigan law (MCL 257.625a), a person can be charged with an OWI if that person’s blood, breath, or urine show any sign of alcohol if the person is under the age of 21, and if the blood alcohol content (BAC) is 0.08% or higher for anyone who is 21 and older. Sometimes Michigan police officers administer breathalyzer tests in order to determine a driver’s BAC, but a police officer also may require a driver to submit to a blood test if they prefer. Does a law enforcement officer need to have a warrant in order to force a driver to submit to a blood test?
This is a question that actually went before the U.S. Supreme Court, and in 2016 the Court ruled that warrantless blood draws are unlawful in most suspected drunk driving cases, while a warrantless breath test is lawful.