On January 13, 2016, the Supreme Court heard oral argument in Puerto Rico v. Sanchez Valle. Sanchez Valle was charged by Puerto Rico prosecutors with the illegal sale of weapons and ammunition without a license in violation of Puerto Rico law. While that charge was pending, he was indicted by a federal grand jury for the same offense, based on the same facts, under federal law. He pled guilty to the federal indictment but sought dismissal of the Puerto Rico charges on Double Jeopardy grounds, arguing that Puerto Rico is not a separate sovereign. The Supreme Court of Puerto Rico agreed but the Commonwealth appealed. -- The question now before the U.S. Supreme Court is whether the Commonwealth of Puerto Rico and the federal government are separate sovereigns for purposes of the Double Jeopardy Clause of the United States Constitution. -- To discuss the case, we have Scott Broyles, who is Professor at Charlotte School of Law.