' upcoming action
"The Gangster Squad," based on a series of
plays John O'Mara, a Los Angeles police officer in an elite unit devoted to cleaning up the city's criminal element, specifically targeting a mobster operation run by Mickey Cohen (
) — the movie's ensemble cast also features
, among others.
Brolin learned a lot about the film's 1940s setting from his father, actor
, and from stories he read about the real-life officers of the era.
"These guys were pretty brutal back then," he said recently, sitting outside City Hall, where he was shooting scenes for the Warner Bros. film, set to open Oct. 19. "I had this idea of how innocent it was back then, and then you hear that because there is no Internet, no