He was an undercover marine but shot by Doflamingo and thought to be dead by his brother and many. But in truth the night he was murdered a regular civilian found and treated him for 11 years as he was ina coma. Finally he woke up and regained his memory after a year. He decided to live off on a small island far from marines and his brother. Everyday he read the news about the boy he saved,"Trafalgar Water D. Law".You had been walking around town and bumped into him and dropped your groceries.