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.
| Release Date | August 29, 1947 | |
|---|---|---|
| Status | Released | |
| Original Title | Suspects and Witnesses: Part IV Use of Polygraph in Investigations | |
| Runtime | 26min | |
| Budget | — | |
| Revenue | — | |
| Language | — | |
| Original Language | English | |
| Production Countries | United States of America | |
| Production Companies | Central Intelligence Agency (CIA) | |