Sejanus did not begin his final attack on Agrippina until after the death of Livia in AD 29. Tacitus reports a letter being sent to the Senate from Tiberius denouncing Agrippina for her arrogance and prideful attitude, and Nero for engaging in shameful sexual activities. The Senate would not begin highly unpopular prosecutions against her or her son until it received clear instructions from Tiberius to do so. Despite public outcry, Agrippina and Nero were declared public enemies ("hostes") following a repeat of the accusations by the emperor. They were both exiled; Nero to Pontia where he was killed or encouraged to commit suicide in AD 31, and Agrippina to the island of Pandateria (the same place her mother was exiled to).