In 1978, a number of Scientologists, including L. Ron Hubbard's wife Mary Sue Hubbard (who was second in command in the organization at the time), were convicted of perpetrating what was at the time the largest incident of domestic espionage in the history of the United States, called "Operation Snow White". This involved infiltrating, wiretapping, and stealing documents from the offices of Federal attorneys and the Internal Revenue Service. The judge who convicted Mary Sue Hubbard and ten accomplices described their attempt to plead freedom of religion in defense: