Bang Bang(2011)

Justin is a troubled teen looking for a way out of the gang life. His best friend Charlie is a rich Taiwanese kid who lives in the nice part of town. Justin runs away from home after a fight with his Mom and takes refuge at Charlie's house while Charlie's parents are away on a prolonged business trip. The murder of a fellow gang member avalanches into a full blown war with a rival gang. Caught in the midst of teenage angst, gang life, and alienation, the two friends find themselves heading down two different paths of life."