In an unusual move, Rep. Maxine Waters (D-Calif.) will hold a press conference Friday on Capitol Hill to offer a detailed rebuttal to charges from the House Ethics Committee that she broke conflict-of-interest rules two years ago by helping arrange of cash infusion of more than $12 million in federal bailout funds for a bank in which her husband was a major shareholder.

Waters and her chief of staff and grandson, Mikael Moore, have scheduled a two-hour event to defend themselves. The House ethics committee released a report on Monday that said Waters’ office improperly contacted Treasury Department officials in September 2008 to press for aid to prevent the failure of Boston-based OneUnited Bank, which eventually stayed afloat with the money from the Troubled Assets Relief Program. The report says Moore specifically sent e-mails and offered other aid for the bank and blames Waters for allowing her staff to play such a role.