April 2013

U.S. Supreme Court holds:  "In drunk-driving investigations, the natural dissipation of alcohol in the bloodstream does not constitute an exigency in every case sufficient to justify a blood test without a warrant." 

, No. 11-1425 (U.S. Apr 17, 2013). The Defendant was charged with DWI.  He filed a motion to suppress the results of a warrantless blood draw that was taken without a valid search warrant.  The trial court granted the motion to suppress.  The Missouri Supreme Court affirmed the grant of the motion.  The U.S. Supreme Court granted certiorari to resolve a split of authority.

The U.S. Supreme Court affirmed the Missouri Supreme Court. Kennedy concurred. Roberts concurred in part and dissented in part. Thomas dissented. The question was whether the natural metabolization of alcohol in the bloodstream presented a per se exigency that justified an exception to the Fourth Amendment's warrant requirement for nonconsensual blood testing in all drunk-driving cases.  The Court held that it did not.  While the natural dissipation of alcohol in the blood may support a finding of exigency in a specific case, it does not do so categorically.

Whether a warrantless blood test of a drunk-driving suspect is reasonable has to be determined on the totality of the circumstances.  Any compelled intrusion into the human body implicates significant, constitutionally protected privacy interests.  The general importance of the interest in combating drunk driving does not justify departing from the warrant requirement without showing exigent circumstances that make securing a warrant impractical in a particular case.  Because the case was argued on the broad proposition that drunk-driving cases present a per se exigency, the Court was not provided with an adequate analytic framework for a detailed discussion of all the relevant factors to determine the reasonableness of acting without a warrant.

In Abney v. State, the Texas Court of Criminal Appeals considered whether an officer had reasonable suspicion to initiate a traffic stop when a vehicle was driving in the left lane of a road without passing.  There was a road sign that prohibited driving in the left lane without passing, but it was located over 20 miles away from where the Appellant was pulled over.

As tends to happen, the police officer found marijuana during the traffic stop. At trial, and on appeal, the Appellant claimed that he did not commit a traffic violation because the road sign was not anywhere near where the stop occurred.  The trial court and 5th Court of Appeals (Dallas) overruled this argument.  The CCA, on the other hand found it meritorious.

The Transportation Code certainly indicates that if there is a sign present that says the left lane is for passing only, then it is a traffic offense to travel in the left lane when not passing another vehicle. Section 544.004(a) states that an operator of a vehicle shall comply with an applicable official traffic control device such as a "left lane for passing only" sign. Without such a sign present within a reasonable distance of the traffic stop, there is no offense.

The CCA reversed the Court of Appeals and held that the officer lack reasonable suspicion to justify the traffic stop.  The evidence should have been suppressed at trial.