As for the polygraph - Jeremy had no stress when he took it. He'd already been convicted, it's not like he was waiting to go to court. He had nothing to lose. The guy who took the test is hardly going to say that 'yes' Jeremy could fake it, he's going to tell them what they want to hear. We also don't know that he's not a psychopath but I guess you can convince yourself of anything if you really try.
Trouble I have with this though Caroline is he did have a lot to lose didn't he. Ok so suppose he was guilty, how is taking a polygraph not going to be stressful after saying for 25 years that you are innocent . He was asking to take the polygraph since the late 80's so I dont buy that one at all.
As far as the psychopathy is concerned I think it is a bit of an insult to all the professionals that have actually seen him to say that he is. Ok I know we can go over the bit where some people are saying he didnt have this test or that test but he was tested and properly and they found nothing wrong. If Jeremy is guilty and did it for the money he wouldn't need to be a phyco would he.
It might also be considered an insult to the intelligence of those professionals who have deemed him to be such. We know how hard it is to diagnose psychopathy. It isn't conveniently written across foreheads and is just as likely to be a charming, good looking, urbane and cultured individual who can pull wool over the most knowledgeable eyes, as a slobbish, uneducated one.
I don't understand the reasoning behind your belief that a crime committed for money means the perpetrator has no need to be psychopathic. Perhaps you're forgetting that in order to get his hands on THIS money, five people, including two infants, were required to die.