Pelletier routinely associated with a group of known criminals. On the night of 14 October 1791, with several unknown accomplices, he attacked a passerby in the rue Bourbon-Villeneuve in Paris and stole his wallet and several securities. During the robbery he also killed the man, though this is disputed in later literature as possibly just having been an assault and robbery or also an assault, robbery, and rape. He was apprehended and accused that same night, for the cries for help alerted some in the city, and a nearby guard arrested Pelletier. Judge Jacob Augustin Moreau, the District Judge of Sens, was to hear the case. A legal advisor was given to Pelletier, but despite his efforts and calls for a fairer court hearing, the judge ordered a death sentence for 31 December 1791. On 24 December 1791, the Second Criminal Court confirmed Judge Moreau's sentence. The execution was stayed, however, after the National Assembly made decapitation the only legal method of capital punishment. Pelletier waited in jail for more than three months as the guillotine was built in Strasbourg under the direction of the surgeon Antoine Louis, at a cost of thirty-eight livres. Meanwhile, the public executioner Charles Henri Sanson tested the machine on corpses in the Bicêtre Hospital. Sanson preferred the guillotine over the former decapitation by sword, as the latter reminded him of the nobility's former privileges that the revolutionaries had worked to eliminate. On 24 January 1792, a third criminal court confirmed the sentence. The execution was delayed due to the ongoing debate on the legal method of execution. Finally, the National Assembly decreed on 23 March 1792 in favour of the guillotine.
Execution day
The guillotine was placed on top of a scaffold outside the Hôtel de Ville in the Place de Grève, where public executions had been held during the reign of King Louis XV. Pierre Louis Roederer, thinking that a large number of people would come to see the first-ever public execution-by-guillotine, thought that there might be difficulty in preserving order. He wrote to General Lafayette to ask for National Guardsmen to make sure the event went smoothly. The execution took place at 3:30 pm. Pelletier was led to the scaffold wearing a red shirt. The large crowd predicted by Roederer was already there waiting, eager to see the novel invention at work. The guillotine, which was also red in color, had been previously fully prepared, and Sanson moved quickly. Within seconds, the guillotine and Pelletier were positioned correctly, and Pelletier was decapitated. The crowd, however, was dissatisfied with the guillotine. They felt it was too swift and "clinically effective" to provide proper entertainment, as compared to previous execution methods, such as hanging, death-by-sword, or breaking at the wheel. The public even called out "Bring back our wooden gallows!"
