FLAGSTAFF, Ariz. (AP) — A Northern Arizona University student has died after a night of drinking at a fraternity event, leading to the arrest of three fraternity members and an investigation by the school, officials said. The 18-year-old male student was found unresponsive at a home by police officers on Saturday after bystanders performed CPR on him, police said. Officers continued life-saving measures until paramedics arrived, but the student died at the scene, police said. Preliminary