Is the Polygraph a Perfect Tool for Detecting Deception?

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The polygraph is still being used in police departments all over the country. Cops are trained to read body language. Some investigators claim they can watch an interrogation with a sound off and know if someone lying. But what andy morgan says is that people aren't any better at sensing a lie than chance.

For nearly a century we've been trying to read someone's truthfulness by the way they act. Be it through machines, or our own intuition. The police have tried. The FBI has tried. The CIA has tried. But the fact is… most of their efforts just don't work.

Are we doomed to ignorance? Maybe not.

We talked to forensic psychologist Andy Morgan about the difficult truth regarding the industry around lying.

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