NPR's Michele Norris talks with Jonathan Turley, a professor at George Washington University Law School, about a Michigan case involving a schoolyard brawl. Nine years ago, Desmon Venn put his classmate, Zuhair Pattah, into a coma with a single punch. He was prosecuted, convicted, and spent two months in boot camp. Last month, nine years after the assault, Pattah died of his injury, and now prosecutors have brought involuntary manslaughter charges against Venn. Can Venn be prosecuted twice for the same crime?