The ACLU welcomes today's Supreme Court's decision in Missouri v. McNeely. Writing for the majority, Justice Sonia Sotomayor upheld the 4th Amendment's privacy protections by rejecting the proposition that states may routinely compel drivers to submit to a blood test in drunk-driving cases without consent and without a warrant.

We know from experience that drunk-driving laws can be strictly enforced without abandoning constitutional rights. Today's decision appropriately recognizes what half the states have already demonstrated – that maintaining highway safety does not require sacrificing personal privacy.

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