Princess Diana was reportedly murdered for pursuing an anti-landmine campaign at the Hero awards party, following the death threat she had received prior to the event.
At the March 1997 Daily Star Gold Awards, the princess of Wales had given a moving speech about the campaign and paid tribute to Chris Moon, a former Marine who had lost an arm and a leg while trying to clear a Mozambique minefield.
However, John Morgan, the author of 'Paris-London Connection: The Assassination of Princess Diana', has claimed that the mum-of-two had another motive for attending the ceremony, the Daily Star reported.
Morgan said that just days before her appearance, the Princess had received a death threat phone call.
According to the book, the caller, a powerful establishment figure, had warned Diana that she should drop her anti-landmine campaign, because one can never tell when an accident is going to happen.
Instead of fearing the call, Diana was adamant that she had to attend the function because she could not allow the slaughter to continue, Morgan said.
He added that Diana had made it clear to her enemies that she wasn't going to back down so they decided to remove her from the scene.