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Watch Suspects and Witnesses: Part IV Use of Polygraph in Investigations

  • Released
  • 0h 26m
  • 1947
    • 0

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Overview

This short dramatized documentary film, presented by U.S. Army, introduces use of polygraph in investigation. Polygraph is used as a lie detector that measures blood pressures, pulse, respiration, skin conductivity while suspect is asked questions and answering them.

Production Countries

  • United States of America

Languages

No spoken languages available

Production

  • Central Intelligence Agency (CIA)

Posters

No posters available