A federal grand jury has charged Minneapolis City Council member Joe Biernat for corruption. The indictment alleges Biernat sought and received plumbing work worth 27-hundred dollars for a house he owned. Biernat says he will challenge the charges. Brothers Thomas Martin and Joseph Martin were also charged for embezzling plumbers union money to pay for Biernat's work. Joseph Martin's lawyer, Gerry Yost , says his client knew of the charges. He says negotiations with federal officials have been taking place over the last three weeks.