Niroc

Niroc was a time lord who was president of Gallifrey during Operation Ravolox and pruposefully staged the Doctor's trial in order to suppress the truth concerning Ravolox. When the Docotr was proven innocent, the adjudicator of the trial went on to become the next president. He was a puppet of the Celestial Intervention Agency. (DW: The Trial of a Time Lord, EDA: The Eight Doctors)