A Georgia inmate is scheduled to die by lethal injection Monday night as his attorneys seek a delay, arguing he's mentally disabled and should not be executed.
Warren Lee Hill has twice come within hours of being executed, and his attorneys are appealing to the U.S. Supreme Court for a stay.
Hill's attorneys are also challenging a new state law prohibiting the release of where the state obtained its execution drug supply.
Hill was sentenced to death for killing a fellow inmate.
His lawyers have long argued Hill shouldn't be put to death because a U.S. Supreme Court decision prohibits the execution of the mentally disabled.
The state argues Hill has failed to prove he's mentally disabled.
The state's lawyers say his case has been thoroughly reviewed by several courts.