While working on a recent post related to the origin of chess960 in 1996 -- Fischer Announces Fischerandom -- I was reminded of a long standing accusation by the 11th World Champion against the 12th and 13th World Champions.
Fischer also ridiculed the U.S. government for indicting him and issuing a federal arrest warrant in his name for his alleged violation of an executive order by then President Bush barring U.S. citizens from doing business with Yugoslavia. Fischer claimed one of the reasons the U.S. government has indicted him and issued the arrest warrant, which is valid all over the USA, was to prevent him from returning to the USA to get access to his enormous file on the first so-called world championship match between Karpov and Kasparov so that he could write a book proving that that match was prearranged move by move. [From the 1996 press release]
If the file was so important, why didn't Fischer have it sent to him? It appears that his paranoia let him trust no one. Or perhaps the file never existed.