Princess Diana wasn't engaged, wasn't pregnant, wasn't murdered and probably would've survived the spectacular Paris car crash that claimed her life had she been wearing her seat belt, according to an 833-page report released Thursday. The report ... was the result of almost three years of investigation into allegations that the princess was murdered by British secret agents after they learned she was pregnant and engaged to Dodi al Fayed, the son of the millionaire owner of the famed Harrod's department store. The report was immediately denounced by Mohamed al Fayed, who has spent millions on a private investigation into the deaths of his son and Diana. He said he would continue to investigate the deaths until he finally found the terrorists ... with power in high places." The elder al Fayed repeated his accusations that his son and the princess were killed to stop them from marrying and to stop his son, a Muslim, from becoming the stepfather of the future king of England. He believes Lord John Stevens, the former London police chief who headed the inquiry, intended to do a thorough investigation, but was forced by British security forces to produce a whitewash. [Stevens] said investigators had concluded that the car carrying al Fayed and Diana ... rammed into the 13th support post in a tunnel near the Seine River. Stevens noted that while there was evidence that al Fayed had purchased an engagement ring for the divorced princess, there was no evidence that she knew about it. Stevens, however, noted Thursday that Diana's premonition that she would die in an accident is "one of those things that will go unanswered."