Last month, the U.S. Supreme Court issued a landmark decision in the area of Driving Under the Influence (DUI) Blood Alcohol Content (BAC) evidence collection, and the rammifications of the case are certain to have an impact on police departments everywhere.
The case, Missouri v. McNeely, dealt with an ordinary enough sounding traffic stop. The defendant in the case, Tyler McNeely was pulled over by a Missouri police officer for speeding and crossing over the centerline. He then exercised his right to refuse a breathalyzer test (the refusal of which the Supreme Court ruled, in South Dakota v. Neville, is permissible as evidence against a defendant in a subsequent trial, and could potentially be construed as evidence of guilt). He was then arrested and transported to a nearby hospital for blood testing. He refused consent, but the officer directed the lab technician to take the sample anyway. His blood tested significantly above the limit, and he was charged with Driving While Intoxicated (DWI).
McNeely motioned to suppress the blood test results, arguing that they violated his Fourth Amendment rights against a warrantless search. The trial court and state supreme courts agreed with McNeely, stating that there was no evidence of exigent circumstances justifying the officer’s failure to first secure a search warrant.
The U.S. Supreme Court agreed with the lower courts, holding that the warrentless nonconsensual test violated McNeely’s Fourth Amendment rights. The opinion holds that the natural metabolization of alcohol is not a sufficient exigent circumstance to justify a per se rule that warrantless nonconsensual blood tests are permissible in every case. It further remarks on the fact that the metabolization argument is flawed for the fact that the process will occur during the transport from traffic stop to hospital anyway.
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