The scheduled execution of Marcellus Williams, convicted for the 1998 murder of a woman, is set to proceed today despite significant opposition from various stakeholders, including prosecutors who argue he might be innocent. Governor Parson and the Missouri Supreme Court have both denied requests for clemency and appeals to halt the execution, leading to urgent calls from advocacy groups and the NAACP for intervention. More than 524,000 people have signed a petition urging the governor to block the execution, while legal representatives for Williams are seeking last-minute Supreme Court intervention. As the execution time approaches, tensions rise, with protests planned outside the Supreme Court, highlighting public concern over the potential miscarriage of justice.