Sextus Roscius (often referred to as Sextus Roscius the Younger to differentiate him from his father) was a Roman citizen farmer from Ameria (modern day Amelia) during the latter days of the Roman Republic. In 80 BC, he was tried in Rome for patricide, and was successfully defended by the 27-year-old Cicero in the extant Pro Roscio Amerino, Cicero's first major litigation. The case involved some risk for Cicero, since he accused Lucius Cornelius Chrysogonus, a freedman of Sulla, the former dictator of Rome, of corruption and involvement in the crime. Sheltered by Caecilia.
https://en.wikipedia.org/wiki/Sextus_Roscius