Street Kings (2008)

LAPD detective Tom Ludlow is a ruthlessly efficient, unorthodox undercover cop. Captain Jack Wander always covers for Ludlow, as do even his somewhat jealous colleagues. After technically excessive violence against a vicious Korean gang during the liberation of kidnapped child sex slaves, Ludlow becomes the target of hotshot Internal Affairs captain James Biggs, who feels passed-over after Wander's promotion to chief. Ludlow's ex-patrol partner, Terrence Washington, sides with IA but is killed during a shop robbery in Ludlow's presence. Ludlow works his way through the twisted rungs of the police and the deadly streets of Los Angeles for answers that only lead to more questions.