Dermot Murnaghan makes a very good point in that first video about the footage from the reconstruction going around the world yet the McCanns throw up every excuse under the sun to avoid doing one. The suggestion that it would somehow end up a media frenzy can easily be avoided by closing off the zone for a day. It has been done in other cases so no reason why it cant be done in Praia da Luz. In any event isn't it publicity that Madeleine needs?
Reconstructions need to be put in context.
A reconstruction would never have recreated accurately actual events leading to the shooting of Jean-Paul de Menezes.
And if there had been a tragic end to the harrowing ordeal Peter Voisey subjected his victim to, and they had relied, alone, on a reconstruction to try to fathom the truth, one of that little girl's family probably would have gone to prison for the crimes of Voisey.
A bid to recreate what went before (particularly to a standard of accuracy and precision required to serve standards of criminal justice) is just a non-starter.