The first mention of Scaurus in historical literature comes in AD 14, at the time of Tiberius' accession to the throne. Both Scaurus and Quintus Haterius gave speeches of congratulation, which the new emperor suspected of being insincere. While Tiberius responded to Haterius' comments with invective, he passed over what Scaurus said in silence.[4]
Scaurus appears periodically in Tacitus' Annales afterwards. In the year 21, when Corbulo complained on the Senate floor that a young noble, Lucius Sulla,[5] had not shown him respect at a gladiatorial show despite being an ex-praetor, much older and more respected by the older senators, Scaurus, Lucius Arruntius, and other kinsmen of the young Sulla defended him. Arguments followed and were only ended when Drusus intervened and brought the body back to order. Both Sulla and Scaurus apologized to Corbulo.[6]
The following year Scaurus appears in the Senate joining in the prosecution of Gaius Junius Silanus for extortion while proconsular governor of Asia, sacrilege and violating the law of majestas towards Tiberius. This prosecution resulted with Silanus exiled to the island of Cynthus.[7]
Scaurus' final episode in the Senate began in the year 32, when Servilius and Cornelius Tuscus accused him and a number of other senators of treason. While some were saved by the intervention of one of the tribunes of the urban cohorts, Tiberius postponed Scaurus' case intending to handle it himself; Tacitus notes the emperor "affixed some ominous marks to the name of Scaurus."[8] When Tiberius considered Scaurus' case two years later, his enemy the praetorian prefect Naevius Sutorius Macro added the charge that certain verses in a tragedy Scaurus had written could be interpreted to disrespect Tiberius. At the suggestion of his wife Sextia, Mamercus Aemilius Scaurus took his own life; she followed suit shortly after.[9]