Monica Goodling, who serves as the Justice Department's liaison to the White House and counselor to the attorney general, notified the committee Monday that she will not be testifying about the scandal.

NPR: Gonzales Aide to Take Fifth Before Senate Panel

She previously served as Counselor to the President of the World Bank and Director of its Department of Institutional Integrity.

FORBES: A New Public/Private Sector Partnership Is Poised to Tackle Global Corruption

Jocelyn Samuels is a Senior Counselor to the Assistant Attorney General for Civil Rights at the United States Department of Justice.

WHITEHOUSE: Department of Justice