Authorities seeks answers in death of student at Missouri high school

Authorities are trying to determine what caused the death of a freshman at Normandy High School near St. Louis. Marquez Oliver, 15, collapsed last week in the school's cafeteria after being punched in the chest by a friend while clowning around, The St. Louis Post-Dispatch reports. Authorities say Marquez had no known medical conditions and was not under a doctor’s supervision.