An independent investigator hired by the city of Minneapolis finds no additional corruption in city hall related to the Brian Herron bribery and extortion scandal. Chicago Attorney Joe Duffy reported to council members that while Herron promised to provide influence in exchange for bribes, there's no evidence he was successful in doing that. But Duffy also cautions against continuing with a political structure that allows council members to exert influence on behalf of a single constituent. Minnesota Public Radio's Art Hughes has more.