To fund the payment for the boat, Fesch decided to rob the Comptoir de Change et de Numismatique
money changer office, operated by Alexandre Silberstein, in the
2nd arrondissment of Paris. To this end, Fesch placed an order for two gold ingots, one 100
napoléon coin, forty-four 20 napoléon coins and twenty 50
peseta coins, totalling a worth of 2 million franc, stole a revolver from his father and convinced his best friend Jacques "Criquet" Robbe to accompany him to the money changer, not informing Robbe of his plans. At around 5 p.m. on 24 February 1954, Fesch and Robbe went to Silberstein's business on rue Saint-Marc, where Fesch pulled his revolver from a large bag. Realising that Fesch was robbing the place, Robbe immediately left the premises and called for help outside, shouting "Quick, my best friend is doing something stupid" ("Vite, mon meilleur ami est en train de faire une bêtise"). Fesch locked the door and began demanding the gold from the elderly shopkeeper. Silberstein asked Fesch to reconsider, stating that he was a veteran and that Fesch was going to ruin his own life with the robbery. Fesch then
pistol-whipped Silberstein twice, knocking him to the ground, but not rendering him unconscious. Silberstein was able to raise the alarm, startling Fesch, who dropped his gun and, while picking it back up, accidentally shot himself in the left hand. Fesch grabbed 300,000 franc from the cash register and fled the scene. Fesch was chased by several passersby, but lost them by hiding on the fifth floor of an apartment building on 9
Boulevard des Italiens. During his escape, Fesch had lost his glasses. The concierge had spotted Fesch entering and flanked down 35-year-old police officer Jean-Baptiste Vergne to tell him of his find. A crowd had gathered in the building's lobby, and having noticed the commotion, Fesch attempted to sneak past. A passerby alerted the others of Fesch's presence, causing Officer Vergne to draw his gun and order Fesch's surrender. Fesch fired his revolver without aiming while the weapon was still in his coat. Vergne was struck in the heart and killed instantly. During his flight, Fesch also injured passerby Raymond Lenoir in the neck when he tried to intervene. After firing another two shots at his pursuers, Fesch ran into
Richelieu-Drouot metro station, which had its gates closed. Finally, 28-year-old Georges Plissier overpowered Fesch and disarmed him. Murdering a police officer was a heinous crime, and public opinion, inflamed by newspaper reports, was strongly in favour of his execution. The
Cour d'assises of Paris condemned him to death on 6 April 1957 after a three-day trial. The same court tried Jacques Robbe and Jean Blot, who allegedly planned the robbery with Fesch, and found them not guilty. Robbe claimed that the death sentence for Fesch was the result of pressure by several police unions on the ministry of justice, alleging that the unions would have refused to provide security detail for an upcoming visit of
Queen Elizabeth II on 8 April. == Religious conversion ==