The president of the NAACP is urging Missouri's governor to halt the execution of Marcellus Williams scheduled for Tuesday, writing that executing a Black man who says he was wrongfully convicted would amount to a “horrible miscarriage of justice.

A death row inmate in Missouri who has long claimed his innocence and is scheduled to be executed in less than one week asked the US Supreme Court on Wednesday for a stay of execution, arguing his due process rights were denied during the yearslong legal battle to save his life.