ATLANTA (AP) — A Georgia man who has come within hours of execution three times in recent years is scheduled to die Tuesday evening unless the U.S. Supreme Court intervenes. Warren Lee Hill's lawyers argue he shouldn't be executed because he is intellectually disabled.

Hill, 54, is set to be put to death at 7 p.m. at the state prison in Jackson. Different courts have intervened with temporary reprieves at the last minute on three previous occasions.

State and federal courts have already rejected his filings this time around, and the State Board of Pardons and Paroles —the only entity authorized to commute his sentence to life in prison — denied him clemency Tuesday. Hill has filings pending before the U.S. Supreme Court, which is now the only potential barrier between him and a lethal injection of the drug pentobarbital.