The Manchurian Candidate1962

Doctor Yen Lo:
[To Raymond] Do you realize, Comrade, the implications of the weapon that has been placed at your disposal?... A normally-conditioned American, who has been trained to kill and then to have no memory of having killed. Without memory of his deed, he cannot possibly feel guilt. Nobody, of course, has any reason to fear being caught. Having been relieved of those uniquely American symptoms, guilt and fear, he cannot possibly give himself away. Ah, now Raymond will remain an outwardly-normal, productive, sober, and respected member of the community. And I should say, if properly used, entirely police-proof.