An inquiry into the death of Princess Diana is "far more complex than any of us thought," the official leading the investigation said. He did not comment on the conspiracy theories that persist nearly nine years after her death.
Lord Stevens, former head of London's Metropolitan Police, acknowledged that some of the issues raised by Mohammed Fayed -- whose son Dodi was killed with Diana in the 1997 car crash -- were "right to be raised." He did not cite a specific issue.
The elder Fayed has claimed, among other things, that Diana and his son were killed by British intelligence officials. Driver Henri Paul also died.