Drusus Julius Caesar
In 31 AD, a plot by her daughter Livilla and Tiberius’ notorious Praetorian prefect, Sejanus, was exposed by Apicata, the estranged ex-wife of Sejanus, to murder the Emperor Tiberius and Caligula and to seize the throne for themselves. Livilla allegedly poisoned her husband, Tiberius' son, Drusus Julius Caesar (nicknamed "Castor"), in 23 AD to remove him as a rival. Sejanus was executed before Livilla was implicated in the crime. After Apicata's accusation, which came in the form of a letter to the emperor, several co-conspirators were executed while Livilla was handed over to her formidable mother for punishment. Cassius Dio states that Antonia imprisoned Livilla in her room until she starved to death.