He was trusted fully by the Emperor, but proved to be a deep-dyed rascal.

He persuaded Livilla, the daughter-in-law of the Emperor, to poison her husband, the heir apparent, and then he divorced his own wife to marry her.

He so maligned Agrippina, the widow of Germanicus and daughter of Agrippa and Julia, that Tiberius banished her, with her sons Nero and Drusus.

In 26 he induced the Emperor to retire to the island of Capreae, and he himself became the real master of Rome.
Tiberius at last finding out his true character, Sejanus was arrested and executed in 31.

His body was dragged through the streets, torn in pieces by the mob, and thrown into the Tiber.
CALIGULA (37-41).
Tiberius having left no son, the Senate recognized Gaius Caesar, son of Germanicus and Agrippina, grandson of Julia, and great-grandson of Augustus, as Emperor.