I was wondering about the cadaver dogs lookout (I don't think Amaral is impartial either) and whether they are reliable or not?
If the dogs sniffed anything,it could have been transferred from Kate,who'd attended a couple of deaths before their holiday.No matter how much clothes are washed/dry-cleaned,a cadaver dog will still pick up the scent.
Kate had a Bible with her,which obviously wouldn't have been washed and the transfer of scent would permeate whatever it came into contact with.
Blood which was found behind a settee could have belonged to the family of holiday makers who moved into the apartment soon after the McCanns moved out to their other apartment while still staying in PDL. Tests were contaminated .
The hire van/car was hired after Madeleine had gone missing. The previous hirer was never documented or named.