The Pro Roscio Amerino is the published version of a speech Cicero delivered in 80 BC, when he successfully defended Sextus Roscius of Ameria on the charge of parricide. Cicero was only 26 years of age at the time and it was his first appearance in a criminal suit. Moreover, it was a high-profile case: it was the first trial to be conducted in the newly-established court appointed for trials under the Cornelian law on poisoning and murder. Cicero refers to the excitement generated by the crowds that had assembled to watch (Cicero Pro Roscio Amerino 11). Indeed, looking back on this speech later in life, Cicero believed that it was the first to launch his oratorical career, for many other cases followed in …
Tempest, Kathryn. "Pro Roscio Amerino". The Literary Encyclopedia. First published 14 June 2010; last revised 30 November -1.
[http://www.litencyc.com/php/sworks.php?rec=true&UID=20484, accessed 21 April 2015.]