LONDON , England ( CNN ) -- The father of Princess Diana 's boyfriend attacked the British Royal family Monday with a series of insults and accusations at the inquest looking into how the couple died . Mohamed Al Fayed , father of Dodi , repeated his allegations of a massive cover-up involving the Royal family , paparazzi and for the first time Diana 's sister . He has previously included British intelligence services in the alleged plot . Al Fayed , who spent most of the day in the witness box , let out a torrent of allegations that members of the royal family were racist . He has previously blamed Prince Philip for the deaths , insisting that the royal family could n't bear the prospect of a Muslim marrying the princess . `` Diana suffered for 20 years from this Dracula family , '' Al Fayed said Monday . `` I will not rest until I die . If I lose everything to find the truth , '' Al Fayed , told the court . Al Fayed , owner of London 's famed Harrods department store , began his testimony by reading a statement saying Diana told him in July 1997 , the month before the crash , that she feared for her life . Watch Al-Fayed have his day in court . » . He said Diana told him her ex-husband Prince Charles , and the queen 's husband Prince Philip , wanted to `` get rid '' of her . Diana said she had a wooden box with her initials on it containing all the details about why she feared for her life , Al Fayed said . He added she told him that if anything ever happened to her , he needed to know about the box . After the crash , however , the contents of the box were stolen before he could get to them , he said . For the first time Al Fayed implicated Diana 's sister , Lady Sarah McCorquodale , in the alleged cover-up . He said he spoke to her about the wooden box after the crash , but the fact that the contents were later stolen is evidence that she tried to conceal them , he said . Al Fayed has previously said that Diana was pregnant with Dodi 's child at the time of the crash , although British and French police investigations into the crash have discounted this . At the inquest , Al Fayed testified that Diana and Dodi were engaged and planned an announcement the Monday after the crash . When an inquest lawyer challenged Al Fayed as to why he did n't tell everybody once he knew about the alleged engagement , Al Fayed claimed he had only just found out himself . `` It was one hour before they were murdered . Am I going to announce it after they were dead ? '' John Macnamara , the former head of security for Al Fayed , last week said at at the inquest that he did not he believe Prince Philip was involved in a conspiracy to kill the couple . During the five-month inquest , witnesses have been questioned about a mysterious white Fiat Uno which some witnesses reported seeing shortly before the crash but which was never traced . Al Fayed said the car belonged to paparazzo James Andanson , who did own a white Fiat Uno . Al Fayed said Andanson , who was found dead two years later in a burned-out car , was part of the murder plot and `` assassinated '' to cover up his role . The inquest has also heard testimony about whether the chauffeur , Henri Paul , was drunk on the night of the crash . Al Fayed claimed Paul was sober and that French investigators botched the tests , though he did not give evidence to support the claim . Instead he alleged a coverup by two French investigators : Dominique Lecomte , who conducted the post-mortem on Paul , and Gilbert Pepin , who tested Paul 's blood . Al Fayed also questioned the delay in transporting Diana to a hospital after the crash , adding she might have survived had she gotten treatment sooner . He also alleged that MI6 , Britain 's foreign Intelligence Service , infiltrated the British tax service , as well as the Home Office -- the UK 's interior ministry -- and continued to conspire against him . Al Fayed said the Home Office denied him a passport as part of the plot . The inquest is required under British law whenever someone dies in suspicious , sudden , or unexplained circumstances but it will only decide how they died and not lay blame . It began in October 2007 -- after the French and British investigations into the crash concluded -- and is expected to last six months . E-mail to a friend . CNN 's Teresa Martini contributed to this report .
Mohamed Al Fayed takes to the stand at the Diana inquest ##s . He claims the death of his son and the family was an intricate affair . Amongst other claims , he claims Diana was pregnant with Dodi 's child . The inquest began in October 2007 and is expected to last 18 months .