In Birchfield v North Dakota (2016), the U.S. Supreme Court held that the Fourth Amendment permits warrantless breath tests incident to arrests for drunk driving. However, it held that warrantless blood tests do run afoul of the Constitution.
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In Birchfield v North Dakota (2016), the U.S. Supreme Court held that the Fourth Amendment permits warrantless breath tests incident to arrests for drunk driving. However, it held that warrantless blood tests do run afoul of the Constitution.