Question: Why you should never take a polygraph?

The police cannot force you to take a lie detector test whether you are a suspect or have been arrested. Unreliable results. The results of a lie detector test are unreliable, and many innocent people have failed them. Even if you pass the test, this does not mean that you will not be charged with committing a crime.

Should you ever take a polygraph?

You are never under any legal obligation to take a lie detector test in a criminal investigation. Even if police tell you the test is mandatory or they threaten you with arrest if you refuse to take one, you dont have to.

How often do innocent people fail a polygraph?

How often do polygraphs give false positives? correct innocent detections ranged from 12.5 to 94.1 percent and averaged 76 percent; false positive rate (innocent persons found deceptive) ranged from O to 75 percent and averaged 19.1 percent; and.

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