The U.S. Attorney's office says a federal grand jury has charged two Columbus men with running a local dogfighting ring. 33-year-old Dwayne Robinson Junior and 21-year-old Henry Hill Junior allegedly bred, schooled and American Pit Bull Terriers to fight. The two were arrested in April of last year after authorities raied five Hilltop-area homes. Two other people - 58-year-old Randall Frye and 40-year-old Charles Granberry have already pleaded guilty in the case. Police say the ring is the largest in recent local history.