Simplify the following text for a Grade 10 native English-speaking person.
Original: Germanicus 's widow Agrippina the Elder and two of her sons , Nero Caesar and Drusus Caesar were arrested and exiled in AD 30 and later all died in suspicious circumstances .
Simplified: Germanicus 's widow Agrippina the Elder and two of her sons were arrested and exiled in AD 30 and later all died in suspicious circumstances .