The state of Georgia is set to put a mentally disabled prisoner to death on Monday unless the U.S. Supreme Court intervenes. Warren Hill was sentenced to death for murdering a fellow prisoner while serving a life sentence for fatally shooting his girlfriend. He was granted a last-minute reprieve before his last scheduled execution in February. A 2002 Supreme Court ruling bans the execution of people deemed mentally retarded, but Georgia is the only state that requires proof of such disabilities “beyond a reasonable doubt.” Three experts who once testified Hill did not meet the criteria have since recanted. The New York Times wrote in an editorial Thursday: “All seven experts who have examined Mr. Hill now agree he is mentally retarded. If that doesn’t count as proof beyond a reasonable doubt, it is hard to imagine what would.” Warren Hill will die Monday at 7 p.m. from a single injection of pentobarbitol unless the Supreme Court stays his execution.