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WASHINGTON (AP) - The Supreme Court has ruled that police must usually try to obtain a search warrant from a judge before ordering blood tests for drunken-driving suspects.

The justices on Wednesday sided with a Missouri man who was subjected to a blood test without a warrant and found to have nearly twice the legal limit of alcohol in his blood.

Justice Sonia Sotomayor said for the court that the natural dissipation of alcohol in the blood is generally not sufficient reason to jettison the requirement that police get a judge's approval before drawing a blood sample.

Missouri and the Obama administration were asking the court to endorse a blanket rule that would have allowed the tests without a warrant.

MARION, Ill. (AP) - A man who resigned as a southern Illinois sheriff's deputy after being accused of drunken driving for the second time in five years has pleaded not guilty to his latest DUI count.

WSIL-TV reports that 48-year-old deputy Shaunn Curry entered the plea Tuesday in Williamson County Circuit Court. He's charged with driving under the influence.

Authorities say the Williamson County deputy was off duty in his own vehicle March 1 when he was stopped near Marion after several motorists called 911 to report a possible drunken driver.

Curry was found guilty in 2009 of DUI related to a December 2007 wreck he had while off duty. He was sentenced to two years of conditional discharge.

He resigned late last month.