The several alerts by a cadaver dog of proven worth tell us that a deceased person or objects/materials which came into contact with a deceased person could have been detected. A child disappears, a cadaver dog alerts, a coincidence too far?
Having watched the video footage from Praia da Luz and what has come to be accepted as the cadaver dog alerting, I think it safe to say that the same dog showed the same behaviour from one end of Haute de la Garenne to the other.
The mistaken intelligence thus provided set the investigation into the actuality of what may have happened to children in care at the home off track and ran the risk for future prosecutions of offenders.
In parallel with the misinterpreted intelligence vis-a-vis the McCann case which was allowed to run to the extent of implicating the wrong people as suspects.
The ramifications of which are felt to the present day as evidenced by threads such as this on various fora on the internet.
THE INDEPENDENT JERSEY CARE INQUIRY
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By this time, the Metropolitan Police review team had expressed the view that no bodies had been buried at Haut de la Garenne.
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In his review, Matt Tapp concluded that statements had been made in relation to the 'skull fragment', 'cellars' and 'shackles' which were not accurate; that 'the nature and quantity of much of the media coverage was generated and sustained by the police's deliberate decision to provide a regular diet of information to the media'; and that 'on a number of occasions, [Lenny Harper] 31 32 placed information and allegations into the public domain, or responded to issues and allegations in the media, which distracted attention from the child abuse investigation, and this may have tarnished the reputation of the force and weakened public confidence in the investigation and its professionalism'.
http://www.jerseycareinquiry.org/Transcripts/Day%20126%20Documents%20Optimised.pdf I think it is obvious the cadaver dog did its job in both cases. In both cases, nobody, not even his handler knows why he was barking.
There are apparently some who refute the substantial body of evidence from Jersey to that effect and publish conspiracy theories of the murder of children; which were we to take the cadaver dog at his bark would have been a massacre.
Unfortunately, the case in Luz was not subject to the same internal inquiries ... leaving even more room for speculation and wild, preposterous theories.