Trio was an active prosecutor (delator) during the reign of Tiberius who developed a reputation for making accusations.
He was governor of Lusitania from about 21 to 31, before returning to Rome to hold the office of consul suffect with Publius Memmius Regulus in 31.
Libo's goods were divided among the prosecutors, and they were all (except Serenus) elevated to the rank of praetor (extra ordinem).
[7] This trial is the earliest example of Tiberius rewarding prosecutors with political advancement, which would become a recurring theme throughout his rule.
[8] Trio is again an accuser in 20 CE in the trial against Gnaeus Calpurnius Piso, for which he received an imperial commendation.
He worked alongside Servaeus, Veranius, and Vitellius to lay down the charges against Piso, which include: provincial mismanagement, tampering with the army in Syria, and the murder of Germanicus with poison.
Trio had to promote the imperial cult and build the "Temple of the Deified Augustus" in the new forum of Augusta Emerita, a work that Bocchus would be in charge of.
[2][11] While still in Lusitania, on 21 January 31, Trio offered shared client status to several freemen of the Stertinia family.
[16] Haterius Agrippa wasn't popular and Cassius Dio says Tiberius was still grateful for Trio's performance in prosecuting Libo.
He left a will insulting Tiberius and Macro which his sons tried to suppress, but the emperor had made public in a display of tolerance of free speech in others.