The U.S. Department of Labor Friday filed a federal court complaint alleging a Hyundai assembly plant and two Alabama suppliers illegally used oppressive child labor. Hyundai Motor Manufacturing Alabama LLC, SMART Alabama LLC and Best Practice Service, LLC jointly employed a 13-year-old girl who worked 50-60 hours a week on an assembly line in Luverne, Ala., for up to seven months, the Labor Department said. "Instead of attending middle school ...