“Judge, is it true that all drunk driving convictions are now invalid?” I was recently asked this question, which was prompted by a recent decision of the United States Supreme Court that got media attention.  In State of Missouri v. McNeely, the Supreme Court decided last April that the Fourth Amendment[1] to the U.S. Constitution requires that, in the absence of “exigent circumstances,” a search warrant be obtained to authorize the drawing of a blood sample from an impaired