Former senior White House aide Lewis Libby is scheduled to make his first court appearance Thursday to face perjury, false statement and obstruction of justice charges.
A grand jury indicted Mr. Libby on Friday in connection with statements he made to jurors and FBI agents investigating who in the White House publicly identified a covert CIA officer.
Mr. Libby stepped down from his post as Vice President Dick Cheney's chief of staff after the indictments were handed down.
Monday, Mr. Cheney named his official government lawyer, David Addington, to replace Mr. Libby as chief of staff. He chose a member of his national security team, John Hannah, to fill Mr. Libby's other post as assistant to the vice president for national security affairs.
At least one other person, President Bush's chief adviser Karl Rove, reportedly remains under investigation in the CIA leak probe.
Some information for this story provided by AFP and AP.