MORI 149551

[PAGE 1]
H-B13 8 May 1950

TO ALL CHISFS

SUBJECT:Interrogation Techniques

l. This lleadquarters is interested in collecting on a continuing basis the following types of information on interrogation (or interview) techniqies usei-by security police organizatins, police departnents, wourt roons, and intelligence services throughout the world, with enphasis on methods:

General Interrogation: Routine interrogation methods, both formal and informal, utilizing non-technical procedures to. obtain the desired information.

b. Technical Aids to Interrogation:

(1) Physical: Various methods of physical persuasion utilized to elicit information from an unccoperative individual,

(2)Psychological: Threats, inferences, promises, a nd extended procedures utilized in special interrogation approaches, softening-up processes and inducements.

(3) liechanical: Various drugs, such as the so-called "truth serums", utilized to break dowm inhibitions and resistances and to produce short or prolonged control or influence over the subject. Also mechanical techniques used as a fqrm of medicinal duress to produce pain or discomfort to the subject.

2. Headquarters is keenly interested in securing all available information concerning this subject and youare instructed to take all .possible action to fulfill these requirements without interfering with other priority.assignments of your

COFY

COPY

COTY