Marcellus Williams, the Missouri death row inmate who has maintained his innocence for nearly 24 years, is scheduled to be executed Tuesday, a day after the governor and the state Supreme Court refused to intervene.

If all the executions are carried out, this will reportedly be the first time in more than 20 years that five were held in seven days.

One day before he’s scheduled to be executed, a Missouri death row inmate could learn whether his fate will change after the state’s Supreme Court hears arguments in his case.