Robin and Jack Firestone claimed they were stopped by British and French authorities in giving testimonies.
The pair - who were travelling back to their hotel with their 11-year-old son Brandon - revealed she saw two dark and mysterious cars that stopped in front of Diana’s Mercedes and she claims they were involved in the crash.
“It stands out in my mind so vividly to this day,” Robin told the Express. “I could not understand why they were there. They looked at odds with what had happened. I saw those darks cars, and they must have entered ahead of Diana’s."
“They were just awkwardly parked, and I don’t recall anyone being in them. The two cars had to be driving ahead of Diana’s car. They then buried all reference to them, but they were there.”
“We still live in fear today because of what we saw and what we were told,” says Robin. The couple claim her death was not an accident. “I think the crash was a royal thing and other forces were involved,” adds Jack.
“Something bad could still happen to us. There are enough nuts out there who may try to silence us.”
“I hope that one day, as William and Harry grow older that they want to take responsibility to find out what really happened to their mother. If it was my mother I would definitely want to know."
“I hope that someday they will find out the truth.”
WATCH PRINCE WILLIAM OPEN UP ABOUT HIS MOTHER'S DEATH: