Francis David "Frank" Castle, Sr.[13] is a former United States Marine-turned-violent vigilante. While serving in Afghanistan alongside with Billy Russo, where the duo became close friends, Castle and Russo joined the black-ops team, Cerberus Squad under the command of CIA Officer William Rawlins aimed at capturing, interrogating, and executing high-value targets. Fearing he was slowly losing his honor, Castle returned to his family, only to lose them all during a brutal shooting. Castle…