The French lie and spew falsehoods. It was not a robbery and none of the perps (if ever caught) will be charged with such.
You see, this event was a simple burglary.
Besides, the jewels that were taken were knock-offs. The real ones are either locked up in a highly secure safe or have been stolen many years ago.
Think for a minute, why do you think the crown belonging to Napoleon’s wife, Empress Eugenie, was discovered damaged outside the gallery? Because it was a cheap counterfeit.
That's true - it says so right on the display case labels.