The Family directed by Luc Besson

This film seems more fun if you think that Manzoni senior is the only person in the witness protection program, and the wife and kids are federal agents who over time have been corrupted by Manzoni and his methods. He's exiting the underworld by writing his memoirs, while they are entering it and slowly mastering the necessary dark arts. The story proceeds amid moments of guilt and pangs of realization.