Polygraphs are a tool for LE to aide in investigations. I have a friend who is a polygrapher with a large department. He trained at Quantico and attends seminars and ongoing training there. Polygraph results are actually allowed in civil trials if both sides agree to it. Of course that rarely happens.
The ongoing discussion about polygraphs is not going to end, IMO, because either you think they are helpful or you don't. For those who do not think they are helpful, can anyone explain how you have two different people and different genders not being truthful in regard to the same questions but truthful in others? That would be an oddity, IMO. I believe the Sheriff and the FBI in that the parents are not being truthful in all questions.
I do not believe for a moment that polygraph results is the only thing the Sheriff and the FBI have. As in all cases, it is the totality of the evidence that makes the case. The truth is a constant. You can tell the truth time after time with consistency.
I keep just reading because I have nothing of substance to add. The only other thing I want to say is that I also do not believe for a second that the only people who know what happened to little DeOrr are the parents, GGPA, and IR. I believe there are others involved here, IMO. I just hope that sooner or later someone will decide to come clean about what they know.
JMO