Nero designed a ship that would open at the bottom while at sea. Agrippina was put aboard and after the bottom of the ship opened up, she fell into the water. Agrippina swam to shore so Nero sent an assassin to kill her. Nero then claimed Agrippina had plotted to kill him and committed suicide.

What happened to Agrippina the Elder?

In 29 Agrippina was exiled, and in 30 her son Drusus was imprisoned. In 33, two years after the fall of Sejanus, they both died by starvation.

Who murdered Caligula?

In January 41, four months after his return to Rome from Gaul, Caligula was murdered at the Palatine Games by Cassius Chaerea, tribune of the Praetorian guard, Cornelius Sabinus, and others. Caligula's wife Caesonia and his daughter were also put to death. He was succeeded as emperor by his uncle Claudius.