He returned to Rome in December, and was present in 20 March when Agrippina arrived with Germanicus' ashes. He was also present for the trial of Gnaeus Calpurnius Piso, who was posthumously found guilty for the crime of "maiestas" (treason). On 16 December, his father gave a eulogy for Germanicus during a Senate meeting, and he gave a eulogy the next meeting. It was decided that their eulogies would both be inscribed in bronze: that of Tiberius for future generations, but the "libellus" (eulogy) of Drusus to demonstrate the devotion of Drusus for his adoptive brother in a show of "pietas" (piety).