I'll start us off: (Originally posted June 24 on Websleuths) I really believe that prior to their dinner date that fateful evening GM and KM were preparing the kids for another evening alone. I think Maddie was not too pleased with the prospect. I think she had been traumatized a couple of nights previously, remember the reports of neighbors hearing her crying for her so-called father? She was not being cooperative and might even have thrown a fit. I think GM was angry at being kept from his "fun" that evening. I think he lost his temper when trying to get her to take her sedative and either scared her so badly that her little heart gave out or he manhandled her and fatally injured her. My reference to her heart has to do with the possibility of her having a heart defect related to a mild form of CHARGE that she might have had (see: http://en.wikipedia.org/wiki/CHARGE_syndrome). I believe that GM panicked and convinced KM that they had to cover it up because if they didn't they would lose their medical licenses and the twins as well. I think he had time to take Maddie's body to a remote location and hide her and then return to the resort in time for dinner. I would love to know how their dinner mates felt about their behavior that night. I think KM felt no choice but to go along with her husband. Some of her body language shows some anger towards GM. Watch her in this video (http://news.sky.com/skynews/article/0,,91210-1264418,00.html) when she reads the script asking for the return of their daughter and GM nuzzles her at the end. Watch her eyes and the movement of her head and see if you don't pick up on a flash of anger towards GM. I see it right at the end when he starts rubbing on her. I thought the nuzzle looked like GM's way of saying "thanks for going along with protecting my sorry a$$". Once the deed was done they were trapped. No going back. I am not sure that they have involved anyone else in this deception (maybe the friend that said she saw a stranger carring a child?) but he could insure their silence by threating to expose their own neglect of their children. He could convince them that if they talked they would all end up investigated by the authorities.