It is really necessary for polygraphs to be used in criminal investigations?
Md Ariful Islam
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এমবিএ(মার্কেটিং)
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Dr. Md Rushad Rahman
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Nope! In fact, investigators rarely use them. When they do try to get a suspect to take a polygraph, it's more for show as a scare tactic than because they care about the results.
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