In 29 Sejanus began a series of purge trials of senators and rich equestrians in the city, removing those capable of opposing his power, adding to the imperial (and his own) treasury. Networks of spies and informers brought the victims to trial with false accusations of treason, and many chose suicide over the disgrace of being condemned and executed. Only Caligula, the last remaining son of Germanicus, managed to survive the purges of Sejanus. He had moved to Capri to be with Tiberius in 31.