Sicario.

"In this unprecedented and chilling monologue, a repentant Mexican hitman tells the unvarnished truth about the war on drugs on the American. El Sicario is the hidden face of America's war on drugs. He is a contract killer who functioned as a commandante in the Chihuahuan State police, who was trained in the US by the FBI, and who for twenty years kidnapped, tortured and murdered people for the drug industry at the behest of Mexican drug cartels....