I don't dismiss information because I don't agree with some of the opinions of the person who provides it. That's very short-sighted imo. In this case he was correct in his assessment.
so you agree with him that the Portuguese investigation was initially pretty poor
“Gamble explained that the Portuguese police's initial response to the case was chaotic and haphazard. He said this was "alien to the more structured police you would expect here in the UK. There was not a sense of order".
"In the first instance, the parents should be your number one suspects," he told Sky.
"In most cases, in the first few golden hours, as you collect evidence, you can then rule them in or out.
"And that was one of the huge flaws in this – people didn't focus on clearing the ground beneath their feet in those chaotic first few hours that led into the haphazard first few weeks.
"When I carried out the scoping review there was no evidence that some of the critical information and the analysis of which could have led to intelligence and to leads had been followed up."