Who is Mary Sue Whipp from Inside Scientology: The Story of America's Most Secretive Religion and what is their importance?

Mary Sue Whipp was Hubbard's third wife and the most influential to Scientology. She met Hubbard while still a student at the University of Texas and she soon became an auditor. By 1952, she and Hubbard were married and they had created the Association of Scientologists, the precursor for the Church of Scientology. Placed at the head of the Guardian's Office, the most powerful office of Scientology in the late 1970s, Mary Sue had vast control over what happened in the field, and over almost all aspects of Scientology. She and the others in the Guardian's Office investigated those who were against the church, and often participated in questionable activities. In 1978, Mary Sue was part of a criminal investigation by the FBI that revealed a plan by the Guardian's Office to infiltrate nearly all governmental bodies. Those working for these agencies would then copy any and all Scientology records and would report them back to Mary Sue. Convicted in 1979, she was sentenced to five years, but only served one. By 1981, Miscavige had forced Mary Sue to leave her position with the Guardian Office and she died in 2002 of breast cancer.