In Missouri, Governor Eric Greitens issued a last-minute stay of execution for death row prisoner Marcellus Williams, only hours before he was slated to be put to death Tuesday night.

The stay of execution came after DNA found on the murder weapon did not match Williams, but instead matched another man. Williams, who is African-American, was convicted in 2001 of killing former St. Louis Post-Dispatch reporter Lisha Gayle, who was white, during a robbery.

He was convicted by 11 white jurors and one black juror, after the prosecution was allowed to preemptively strike out six other prospective black jurors. Williams has always maintained his innocence. Amnesty International and other groups are now urging Missouri Governor Eric Greitens to grant Marcellus Williams clemency.