Most polygraphs are non conclusive, so this in my opinion is why they should not be used in the court of law, which means, most answers will be non truths, leaving the person to look like they have committed the crime, and or are guilty.
Polygraph test should be limited to 5 questions, and they are used wrong, interrogation style, and is WRONG..and called misuse.
Polygraphs measures peoples blood pressure heart rate, physiological thinking, this can help catch a criminal perhaps in the area of body langue, and cause the person to collapse under pressure.
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