Thanks for your words of wisdom about a person committing a crime isn't acting crazy. Madeleine was in a disguise if it was her in long sleeves. Remember the Smith sighting can't be our Maddy - she was in short sleeves and the mother was worried about how COLD she was.
Knowing that Mrs McCann has already raised the alarm and the small resort was about to be descended on, don't you think if Mr McCann had to carry the lifeless body of his first born through the streets he would have at least attempted to stay in the shadows, out of sight and do something however small to conceal his identity?
If he didn't and he was seen then as soon as the story broke, people who saw him would have told the police that they had seen him carrying a child, and this is the father of a child that has just been reported missing and their other two children are safely asleep in their cots.
The theory just doesn't add up. It's why the concealment of her body by one of the parents just has no grounding because it involves too many conspiratorial elements.