The events took place Friday afternoon in Aix-en-Provence, in the Bouches-du-Rhône.
A man, who was wearing sunglasses and a yellow jacket, is introduced into a gas station and robbed the manager with a gun dummy.
But the latter has refused to give the contents of his box.
The bank robber will be able to take over 500 euros, before attempting to take flight.
The manager, as well as its fuel vendor who was on the scene, went in pursuit of her, before the master.
“He was so well prepared his shot as he fled in a cul-de-sac,” explained her lawyer.
The suspect was placed in detention on remand and the verdict will be known in January next year.