The expert who stated clearly that no inferences could be drawn from the alerts
He did indeed, in his report dated 22nd August (quoted below). The interesting bit is what he said
before the dogs alerted to all things McCann;
Report 23/07/2007
The apartment in which the McCann's had stayed may present further opportunities to search. The use of a specialist EVRD (Enhanced Victim Recovery Dog) and CSI dog (human blood detecting dog) could potentially indicate on whether Madeline's blood is in the property or the scent of a dead body is present.
In relation to the dead body scent if such a scent is indicated by the EVRD and no body is located it may suggest that a body has been in the property but removed.The apartment was searched on 31/07/2007 and the dogs alerted. The following day two new search warrants were requested for the McCann villa and hire car, the reason being the dog alerts in 5A.
Harrison claimed in his final report that he recommended all the searches undertaken.
That suggests that inferences were drawn by him from the alerts in 5A.
Report 22/08/2007
During the searches two Police dogs were deployed and although it has been stated that no physical remains were located in the area these dogs did give indications in several areas. These areas have been subject to a separate forensic examination that is beyond the scope of this report and at the time of writing laboratory tests are being undertaken. The dogs’ handler has submitted a separate report regarding the performance of the dogs (see appendix 4). However, it must be stated any such indications without any physical evidence to support them can not have any evidential value, being unconfirmed indications. Additionally I consider no inference can be drawn as to whether a human cadaver has previously been in any location without other supporting physical evidence.
http://www.mccannpjfiles.co.uk/PJ/MARK_HARRISON.htm