Article Photos: Josh Brolin goes back to California mob rule in 'Gangster Squad'

This film image released by Warner Bros. Pictures shows Sean Penn, left, as Mickey Cohen and Josh Brolin, as Sgt. John O'Mara in "Gangster Squad." AP Photo <strong>Wilson Webb</strong>

This film image released by Warner Bros. Pictures shows Sean Penn, left, as Mickey Cohen and Josh Brolin, as Sgt. John O'Mara in "Gangster Squad." AP Photo Wilson Webb