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.

Lawyers for a Missouri man have filed a late appeal with the U.S. Supreme Court alleging there were racial bias and constitutional errors at his trial.

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.