To finish his war once and for all, Frank Castle is molding the ninjas of the Hand into his own army of unstoppable killers, by teaching them the Way of the Punisher. The secret lies in a story from his past that he's never revealed to anyone: the story of Frank's first kill.
PARENTAL ADVISORY
I don't think shifting the Punisher's origin to even younger adds much to the character. Is there concern that he'll stop being the Punisher if he gets his family back or something? Is the next writer going to have to one-up this arc with a traumatic toddler Frank Castle origin next? Maybe he executes little Jimmy for shooting a bird with a BB gun?