Universities now play cop, prosecutor, judge and jury in campus sexual-assault cases, often without allowing due process rights to the accused. The Sixth Circuit Court of Appeals last week issued an important rebuke to these Title IX proceedings that ought to become a national standard. Since 2011 more than 300 accused students have sued over Title IX decisions. Doe v. Baum was brought by a former University of Michigan student accused of sexual assault. John Doe and Jane Roe, as the parties are identified, agreed they’d attended a party, had sex and that she vomited in a trash can. A...