Three cases remain before the U.S. Supreme Court. One was brought by St. Louis County prosecutors, who do not support Williams’ conviction or upcoming execution.

Missouri is set to execute 55-year-old Marcellus Williams on Tuesday despite opposition from the state’s prosecuting attorney and the victim’s family.

On Tuesday, Williams, 55, is scheduled for a repeatedly delayed execution that has raised alarms related to DNA evidence and questions of fairness from his 2001 trial. After two last-minute execution reprieves starting almost a decade ago,