I really do feel, that the business of Carpenters wife supposedly hearing someone saying, or calling out, 'Madeleine, Madeleine', so soon after the carpenters had left the tapas restaurant reception area, (between 9.15pm and 9.30pm) lies at the heart of this mystery!
It isn't the McCann parents, or any of their group who is / was responsible for Madeleine McCanns demise, and it wasn't / isn't anything to do with the Carpenter couple, then at the very least here we have a piece of highly significant circumstantial evidence, of a voice calling out Madeleine McCanns name, not once, but at least twice, signifying that the person who took Madeleine knew her, and that the person who spoke was known to Madeleine - in other words, Madeleine McCann was not abducted by any stranger, if she was taken she was taken by somebody who knew her, or as the case may be, who had comforted her during the previous evenings trauma!