Would you expect to find cellular material from a cadaver on the key fob?
I'm not up to speed on the dog alerts, but, if my understanding is correct, the cadaver 'scent' are compounds given off from a decomposing body. These adhere to surfaces and may be transferred from place to place.
It does not appear that these VOCs and DNA have to be in the same place.
If this is correct then the VOCs could transfer to somebody's hand and then transfer to the key fob. Any DNA found could be from the person who transferred the VOCs.
By the same token if Madeleine's DNA had been found in the apartment I do not see how that would prove the cadaver scent, if it existed, belonged to Madeleine, because you would expect to find Madeleine's DNA in the apartment.
The dogs appear to be a tool to raise 'suspicions' to be investigated, but can do little more than that.
I think you have put that succinctly.
I think most of us non-experts on this forum have read and understood what the experts (and I include Martin Grime in this) have told us.
I think a lot of the persistent misunderstanding and in Portugal, the continued acceptance of Amaral's very inexpert opinions being celebrated in TV programmes marking ten years of a missing child, is down to ignoring what the experts have to say.
I think when the penny finally drops there may very well be a horribly embarrassed viewing public in Portugal.
