A blood draw for testing its alcohol content is still considered a search under existing federal and state law. Fourth Amendment rights and privacy concerns apply. The Tennessee Court of Criminal Appeals, in State v. Brown, W2014-00162-CCA-R9-CD (Tenn.Crim.App. 4-30-2015), has again (consistent with prior appellate opinions) reviewed Tennessee's statutory provisions requiring a blood draw under certain circumstances and determined they not dispense with the constitutional warrant requirement (and are therefore not unconstitutional). Also like prior decisions, this particular opinion did not address the question of whether the mandatory blood draw provisions render 'implied consent' not revokable.