Lie Detector Technology: How the Polygraph Reshaped Police Investigations in the 20th Century
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YouTubeCrime Stories Today
Lie Detector Technology: How the Polygraph Reshaped Police Investigations in the 20th Century
The polygraph, often called a lie detector, was first developed during the early 20th century to provide law enforcement with a tool to detect deception beyond traditional interrogation tactics. By monitoring indicators such as heart rate, blood pressure, respiration, and skin conductivity, the polygraph sought to reveal stress caused by ...
218 views1 month ago
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