I think there is some credibility..if a persona is trying to be deceptive, their palms might get sweaty, their eyes might wonder a bit. I recall discussion about that on earlier threads. I wouldn't be surprised if the blood pressure shifted while someone lies. Just the fact that everyone else passed and not DW..makes one think there is definitely something going on there..
Regardless, I would not want polygraph results entered into trial evidence..
It is no different than a professional fortune teller. The gypsy woman reads facial, scent, movement, and verbal cues more adeptly than a lie-detector expert in a white smock.
And at the spirital level -- BOTH are subject to the occult.
Behaving rationally is a spiritual behaviour. It is good for the spirit.
The case *presented in court* against Westerfield is (1) based on a presumption of guilt and (2) due to the information withheld from the finders of fact (the jury) -- occultic. Remember "occult" means hidden. The jurors were cajouled to make a descision based on the hidden, for they surely did NOT make it on the revealed!