A traffic accident in Sandusky County yesterday killed a former U.S. Olympian and Ohio State University track coach. The Ohio Highway Patrol says 74-year-old Mamie Rallins was killed when her car crossed the center line of State Route 53 and crashed into a tractor-trailer. The cause of the accident is under investigation. Rallins competed in track and field at the 1968 and 1972 Olympics before becoming OSU's first women's track coach.