Who is Mark "Marty" Rathbun from Inside Scientology: The Story of America's Most Secretive Religion and what is their importance?

Marty Rathbun is the former inspector general of the Church of Scientology. Originally a part of Miscavige's team, Rathbun was considered Miscavige's enforcer for many years. He joined Scientology in 1977 as a way to try and help his brother, who suffered from schizophrenia. Rathbun helped Miscavige dismantle the Guardian's Office, and he often played the role of investigator for Miscavige. He was also instrumental in the settlement of the case against Scientology by the IRS, and in the McPherson case. Rathbun was also highly involved in making sure Tom Cruise remained with the church and that he was continuously happy and successful in his auditing.