WASHINGTON (AP) - The Supreme Court will decide when law enforcement officers must get a warrant before ordering a blood test on an unwilling drunken-driving suspect.

The issue has divided federal and state courts around the country and the justices on Tuesday agreed to take up a case involving a disputed blood test from Missouri.

In siding with the defendant in the case, the Missouri Supreme Court said police need a warrant to take a suspect's blood except in special circumstances when a delay could threaten a life or destroy potential evidence.

Other courts have ruled that dissipation of alcohol in the blood is reason enough for police to call for a blood test without first getting a warrant.

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