I see what Misty is saying but as I am not a expert with cadaver dogs I don't think I can say much. Grime had worked with Eddie for years, he would know what Eddie was alerting to. Was Misty referring to Eddie's nose before he went around the back of the sofa or whilst he was behind it? If it was before he went around the back it may simply be that the scent was pooling behind the sofa and was therefore stronger at the bottom of the sofa where there would be a gap between this and the floor. Therefore Eddie's nose would point to the bottom of the sofa. I have seen the video but I haven't yet managed to see what Misty means.
"My professional opinion as regards to the EVRD's alert indications is that it is suggestive that this is 'cadaver scent' contaminant.
This does not however suggest a motive or suspect as cross contamination could be as a result of a number of given scenarios and in any event no evidential or intelligence reliability can be made from these alerts unless they can be confirmed with corroborating evidence." Martin Grime
Martin Grime has been consistent throughout.
He assesses his dog's performance and reports back and as far as everything else is concerned the investigation is out of his hands and is transferred to those responsible for collecting evidence from the places indicated by the dog and testing it.
I think the fact is that testing produced positive conclusions which had nothing to do with Madeleine however it is dressed up.