Patricia Dunn claimed she did not know beforehand the methods the investigators used to try to determine the source of the leak. Board member George Keyworth was ultimately accused of being the source and on September 12, 2006, he resigned, although he continued to deny making unauthorized disclosures of confidential information to journalists and was thanked by Mark Hurd for his board service. It was also announced at that time that Dunn would continue as chairwoman until January 18, 2007, at which point HP CEO Mark Hurd would succeed her. Then, on September 22, 2006 HP announced that Dunn had resigned as chairwoman because of the "distraction her presence on our board" created. On September 28, 2006, Ann Baskins, HP's general counsel, resigned hours before she was to appear as a witness before the House Committee on Energy and Commerce, where she would ultimately invoke the Fifth Amendment to refuse to answer questions.