Kolkata case: Polygraph test delayed for Sanjoy Ray due to lack of lawyer
Kolkata rape-murder case: The polygraph, or lie detector test, measures physiological responses like heart rate, breathing patterns, sweating, and blood pressure to assess truthfulness
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Kolkata rape-murder case: The polygraph, or lie detector test, measures physiological responses like heart rate, breathing patterns, sweating, and blood pressure to assess truthfulness
