New DNA evidence proves the driver of Diana, Princess of Wales', car was drunk on the night of her fatal crash in a Paris underpass in 1997, the BBC reports.

The tests confirms that driver Henri Paul had three times the French legal limit of alcohol in his blood, based on original post-mortem blood samples, the BBC said, quoting from a documentary it plans to screen today.

Diana, Princess of Wales, the first wife of The Prince of Wales, and her friend Dodi Fayed were killed when their Mercedes crashed in the Pont d'Alma tunnel in Paris on Aug. 31, 1997 while the couple were being chased by paparazzi.

Henri Paul and Dodi Fayed were killed instantly, and Diana - unbelted in the back seat - slid forward during the impact and "submarined" under the seat in front of her, causing massive internal bleeding.

Princess Diana was transported to the Pitié-Salpêtrière Hospital where, despite lengthy resuscitation attempts, she died. Princess Diana's funeral on 6 September 1997 was broadcast and watched by over 1 billion people worldwide. [source]

The death of Diana has been the subject of conspiracy theories, all of which were rejected by French investigators and British officials, who stated that the driver, Henri Paul, was drunk and on drugs, BBC reports.