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Sandra Hemme spent 43 years in a Missouri prison for a murder she did not commit. Some estimates suggest that a false confession played a role in almost a third of wrongful murder convictions.

Williams is scheduled to be executed Tuesday for the 1998 killing of Felicia Gayle. His attorneys have launched multiple legal battles in an attempt to save his life.

St. Louis Circuit Attorney Gabe Gore’s predecessor, Kim Gardner, filed a similar motion just days before she left office. Gore withdrew the motion in June to conduct his own review of the case.