Short answers, pulled from the story.
Augustin Bon Joseph de Robespierre entered the world on the 21st of January 1763 in Arras. He was the youngest of four children born to lawyer Maximilien-Barthelemy-François de Robespierre and Jacqueline-Marguerite Carrault.
His older brother Maximilien secured a transfer of a scholarship from the Abbey of St. Vaast to Augustin after earning his own law degree. Cardinal de Rohan agreed to let Augustin take his brother's place in studying law.
Counter-revolutionaries attacked their group in Manosque on the 12th of August 1793 but they escaped alive. They reached Nice in September where they attended theatre performances until rotten apples were thrown at them during a third visit.
Augustin removed his shoes and jumped from a ledge onto steps or bayonets below which caused a pelvic fracture and several serious head contusions. He died on the 28th of July 1794 after sustaining injuries during his failed escape attempt.
Augustin Robespierre served as prosecutor-syndic of Arras before becoming a deputy to the National Convention on the 16th of September 1792. During the trial of Louis XVI he voted for immediate execution within 24 hours.