It's ok Maddy, we all are entitled to our opinion. Never know, you may be right, but Me, I don't think they are involved. As Elvis said...
I too think they were negligent in being more protective of their children.
I don't get your logic mm. If they murdered their child, which I don't for a minute believe they did, they have got away with it. So why the heck would they lobby Theresa May and David Cameron to have the case reopened here. If you'd committed murder and got away with it you'd sort of keep quiet and keep out of the public eye not keep drawing attention to yourself. No?