An age-old Pennsylvania legal tradition—the inability to upset a jury verdict regardless of the content or subject matter of a jury’s internal deliberations—has been overturned by the U.S. Supreme Court.

The decision came in the case of a Colorado man Miguel Angel Peña-Rodriguez, who found out after his 2007 conviction that a juror said he thought that Peña-Rodriguez was guilty of sexual assault because he was Mexican and that “Mexican men take whatever they want.”