 On 13 May 2005, citing "close followers of the case, "The Washington Post" reported that the length of the investigation, and the particular importance paid to the testimony of reporters, suggested that the counsel's role had expanded to include investigation of perjury charges against witnesses.Other observers have suggested that the testimony of journalists was needed to show a pattern of intent by the leaker or leakers.Fitzgerald interviewed both Vice President Dick Cheney and President George W. Bush but not separately and not under oath.