On the heels of the new poster released yesterday, Warner Bros. has debuted the second trailer for Gangster Squad. Josh Brolin and Ryan Gosling star as two L.A.P.D. cops who form an elite task force aimed at taking down notorious gangster Mickey Cohen (Sean Penn). Take a look at the latest footage from this crime drama, also starring Emma Stone, Michael Peña, Giovanni Ribisi, and Anthony Mackie.