 Also suspected of connivance in his death was Tiberius's chief advisor, Sejanus, who would, in the 20s, create an atmosphere of fear in Roman noble and administrative circles by the use of treason trials and the role of "delatores," or informers.When Rome had received word of Germanicus' death, the people began observing an "iustitium" before the Senate had officially declared it.Tacitus says this shows the true grief that the people of Rome felt, and this also shows that by this time the people already knew the proper way to commemorate dead princes without an edict from a magistrate.