We've certainly talked about implied consent laws on this blog. Those laws state that all licensed drivers automatically consent to breath and blood tests for alcohol when suspected of a DUI; if a driver refuses such tests, she faces a license suspension along with other penalties.
Now, the U.S. Supreme Court is taking up a Missouri case to determine whether implied consent laws mean an officer can require you to take a blood test without a warrant, according to Courthouse News Service. A ruling by the Court could have nationwide impact, as all states have implied consent laws.
In the Missouri case, lawyers for the state are arguing that warrantless blood tests should be allowed because a person's blood alcohol level decreases over time, in a way destroying evidence before a warrant can be obtained, according to Courthouse News.