The minute LE started asking me to a polygraph is the second I would get a defense attorny.
It is a well known fact the first place they look is the family, and they tend to focus on the parents and in some cases lose sight of everything else.
I have read to many times where parents have been rail roaded, and spent years in prison, wrongfully convicted, because LE refused to look anywhere else. A polygraph will not clear you if LE is determined enough that you did it.
There is a reason these things are not admissible in court. Why LE belives they are a reliable tool I have no idea? It has been proven time and time again, in test after test they can not be counted on 100 percent.
To say that refusing to take one is an admission of guilt, I say if LE believes things like then it is lazy police work.
To say that LE can not rule you out if you don't take one, I say again is lazy police work, they need to follow the evidence and track down the responsible party. If there is a lack of evidence then a polygraph will not help them or point them in the right direction, it could point them in the wrong direction and it could send an innocent person to prison.
Now lets be honest, if Casey A took a polygraph test and past the thing what would be said about her? We would say the test failed because she is so adept at lying that she can easily fool the machine.
Why should the rest of the family have any reason to take one when there is not a shred of evidence on there part of any wrong doing what so ever? For the FBI to even ask them to is incredible!
I'm just not so sure I believe anything LP says on the NG show. I've noticed he isn't on the more respectable shows and news reports. None of the information he has given is credible, and each time he is interviewed he add's something new.