Jon Polito plays Dragna in Gangster Squad .
When Wooters witnesses a young friend/shoeshine boy named Pete ( Austin Abrams ) gunned down when Cohen 's hitman Wrevock ( Troy Garity ) botches an attack on Dragna , he decides to join the squad , and goes to break O'Mara and Harris out of the jail .
Gangster Squad -LRB-film-RRB-