12:23 a.m. August 31st 1997. The Mercedes driven by Henri Paul in which Princess Diana, Dodi Al Fayed and Trevor Rees-Jones were travelling crashes into a pillar in the Alma tunnel in Paris, killing Paul, Dodi and Diana and seriously injuring Rees-Jones. That much is certain. But little else.
David Cohen never expected to be investigating Diana's death. But after a reliable source asked him to fly to Geneva to listen to a dramatic story, he soon found himself on the trial of a young Englishwom...