This is the famous Fishman Affidavit. To explain why it has become so famous, I'll give you some more information. And please take a look at the Scientology Litigation Kit, where I list the materials used for my defense and the lawsuit materials (lawsuits, plea, defense, rulings) and at postings and news about the Dutch Protest.
The Church of Scientology (or: CoS; or: Co$, as some of their opponents call it) sells its followers expensive courses which, if students study them carefully, are supposed to set them free ('clear' them). A former Scientology member, Steven Fishman, was brought before court because he committed several crimes in order to get the money to pay for these courses. Scientology urged him to get the money any which way he could. According to Fishman, they also assigned him to kill somebody, and failing that, ordered him to commit suicide. In an interview for Time Magazine, Fishman relayed those stories and blamed Scientology for his crimes. Scientology sued him for slander.
When Fishman was then brought to court, he used parts of Scientology-documents to prove he had been brainwashed by the Church. These Scientology documents thereby became public material: anybody could go to the court library and read them. The Church, fearing that its sacred secrets would be revealed, had some of their people going to the library every day to borrow these documents, thereby preventing other people (read: non-Scientologists) from reading them. Nevertheless, the Fishman Affidavit got copied (it was also available through the clerk of the court, for a mere $36.50). Somebody retrieved the affidavit via the clerk, scanned it, and posted it to the net. The Fishman Affidavit has been travelling on the Internet ever since.