ERIE, Pa.—The U.S. Supreme Court rejected an Erie woman's appeal of her conviction and life sentence for her role in a bizarre bank robbery plot that left a pizza deliveryman dead when a collar bomb he was forced to wear exploded.

The Erie Times-News (http://bit.ly/UNrJPI) reports Tuesday that the high court refused to hear Marjorie Diehl-Armstrong's appeal of a 3rd U.S. Circuit Court opinion earlier this year that a judge properly refused to suppress statements in the case and properly determined she was mentally competent to stand trial.

She's serving life in prison. A federal court convicted Diehl-Armstrong of conspiracy and bank robbery charges in November 2010.

Deliveryman Brian Wells was killed when the bomb exploded after the bank robbery in August 2003.

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Information from: Erie Times-News, http://www.goerie.com