(AP) -- An Oklahoma death row inmate who's been trying to find out more about the drugs the state would use to kill him is facing execution unless a court intervenes.Clayton Lockett was convicted of shooting 19-year-old Stephanie Nieman with a sawed-off shotgun and watching as she was buried alive in 1999. He has filed court papers to learn more about Oklahoma's execution protocol, but has not challenged his sentence.State courts differ on who should address stays of execution for Lockett and another inmate, Charles Warner. Warner faces execution next week.A lower court judge has ruled Lockett and Warner are entitled to know who made the drugs that will be used at their executions. Barring intervention, Lockett will be executed Tuesday night at the Oklahoma State Penitentiary in McAlester. Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed
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