Locusta

Locusta was one of the first serial killers recorded in history
She lived in ancient Rome and her killing method was poisoning
Nero's Mother was the wife of the Emperor Claudius
She decided to hire Locusta for her killing services

A dish of poisoned mushrooms caused the death of Claudius
She was lated called upon to kill his son Britannieus
Locusta was caught and paid for her crimes in a manner that was typical
She was raped by a trained giraffe then torn apart by animals