The media believes it works, so not agreeing to take one can be used in the court of public opinion to ruin a reputation. For example there's currently a women

The media believes it works, so not agreeing to take one can be used in the court of public opinion to ruin a reputation. For example there's currently a women missing in Hawaii this week called Amanda Eller, her boyfriend was given a lie detector (which he "passed"), the police announced he wasn't a suspect and his test pass. Imagine if he had said "hell no!" as you yourself would. That's the problem. Police keep using something that doesn't work, but if you refuse they will take the refusal itself as suspicious and the media will find out. It may not hold up in a court of law, but good luck ever getting another job with google returning articles about how you MAY have killed someone.