The U.S. Supreme Court heard oral arguments in Missouri v. McNeely to weigh the public’s interest in driving and highway safety against the privacy rights of the individual in deciding if police officers can force suspected drunk drivers to give a blood sample without first obtaining a warrant. 
This case was on appeal from the Missouri Supreme Court, which sided with the motorist McNeely in agreeing that the taking of his blood without a search warrant was unreasonable under the Fourth Amendment’s ban against unreasonable searches and seizures. Missouri prosecutors and the government were asking the Court to set aside the requirement for a search warrant arguing that since alcohol dissipates in the blood, a police officer should not take the time to get a warrant from a judge.
Audio of the arguments was presented with visual still images of participants. Justice Thomas did not speak.