Without evidence of any kind to go on I think Mr Amaral's last throw of the die was to get a confession. I have no idea whether he actually believed "the evidence of the dogs" but it seems he thought it would panic his chosen targets to the extent he would have another 'successful' outcome under his belt, and his future in the PJ assured.
He was and is very sore about having to go, an event for which he blames the Drs McCann ... but which in reality had nothing much to do with them but a lot to do with his own actions.
Alfred has reminded us about Zampo whose alerts to what must have been thought of as residual cadaver odour most certainly allowed a killer or a series of killers to walk free.
Which is a consideration when forming a "theory" and bending the facts to suit.
Quote
In 2008, Hannes Råstam, one of Sweden's most respected documentary-makers, became intrigued.
He visited the former Thomas Quick, now known as Sture Bergwall, at Säter, trawled through
the 50,000 pages of court documents, therapy notes and police interrogations and came to the startling conclusion that there was not a single shred of technical evidence for any of Bergwall's convictions. There were
no DNA traces, no murder weapons, no eyewitnesses – nothing apart from his confessions, many of which had been given when he was under the influence of narcotic-strength drugs. Confronted with Råstam's discoveries, Bergwall admitted the unthinkable.
He said he had fabricated the entire story. Unquote
http://www.theguardian.com/world/2012/oct/20/thomas-quick-bergwall-sweden-murderDavel kindly posted a timely reminder of exactly Mr Amaral's thought process which is wrong in its entirety and meant the inquiry under his leadership was led in entirely the wrong direction ... Quote:
So, we can conclude that the odour discovered is certainly that of Madeleine Beth McCann. (TOTL) Unquote
No-one ... not even the dog's handler could conclude anything without corroboration.
Nor can any interpretation be made as from whom the supposed odour emanated ... unless as well as not lying dogs can talk and make an inky impress of their paw on a witness statement.