Jackie Onassis believed that Lyndon B Johnson and a cabal of Texas tycoons were involved in the assassination of her husband John F Kennedy, 'explosive' recordings are set to reveal.
The secret tapes will show that the former first lady felt that her husband's successor was at the heart of the plot to murder him.
She became convinced that the then vice president, along with businessmen in the South, had orchestrated the Dallas shooting, with gunman Lee Harvey Oswald ? long claimed to have been a lone assassin ? merely part of a much larger conspiracy.