As a criminal defense att'y, I would recommend ag'st a polygraph test. You dont have to give evidence ag'st yourself. The biggest tactic cops use is take the polygraph and if you pass, all will be good. Then, they tell you that you failed, to see your reaction. Doesnt matter if you passed or not. Too subjective IMO. Plus, even if they show you the squiggly lines, you wouldnt know how to read it anyway. You have the trust the people who have asked you to take a test bc they dont believe you in the 1st place. Hmmmmm.
Keith
If your in any sort of trouble with the police, (expecially to the point they are asking you to take a poli) the first and last words out of your mouth should be "I want a lawyer"