Claire Headley recounts events from her life as a senior Sea Org executive working in the Religious Technology Center (RTC). These events were stressful, abusive, and worsened by extreme sleep deprivation. This caused Claire to lose so much weight that she believed she had cancer. These events led Claire to secretly plan her very dramatic escape from the Sea Org. 

Commanded by Captain David Miscavige, RTC can be correctly described as the "Internal Affairs" branch of the of the Church of Scientology. Miscavige his complete dictatorial control over the Church of Scientology through his invented office of "Chairman of the Board, Religious Technology Center."

Public money is used for espionage and blackmail.
Tax exempt money used for *Religious infilatration*
Ecclesiastical !
Mark Fisher was a very high-ranking Sea Org member who served as David Miscavige's personal assistant. Mark had significant insider details. When Mark left the Church in 1990 he went into business in Las Vegas with other former high-ranking Sea Org members including former CMO and even a CST Trustee. As a result, David Miscavige had the "Las Vegas Group" spied on for years by Scientology PI David Lebow and later by Ferris Khan. Mark relates details in this video.
Note the language of David Miscavige.