Especially when in TOTL GA stated he wished he had never sent the results to Birmingham FSS
Then IIRC the B/lab was deeply criticized for cases it had botched up.
The FSS suffered damage to its reputation following the failure to recover blood stains from a shoe in the murder of Damilola Taylor.[5] Further damage occurred when the FSS failed to use the most up-to-date techniques for extracting DNA sample
GA SNIP
As for the English authorities, Amaral believes that they too "are looking for paedophiles who fit in the abduction theory, without however proving that there has been an abduction".
The cadaver dogs, brought by the British authorities, detected blood in the house, but that evidence was eventually depreciated. "The English laboratory wrecked the results", said Gonçalo Amaral, who reproaches the laboratory technician of expressing opinions about the results.
In the same interview GA blamed the English dogs, brought to Portugal at the request of Kate & Gerry, for contaminating the same evidence he said should never have been sent to FSS. Yet without the dogs, there wouldn't have been any forensics suggestive of Madeleine's blood or DNA.
Now we have the involvement of an unbiased German police force, with no political undertones, seeking to solve the case based on previously unknown evidence and Amaral is still living in 2007. The Germans have enough on their hands right now, which may or may not be linked to CB & his treasure trove.
https://www.dw.com/en/germany-investigating-30000-potential-suspects-in-pedophile-probe/a-53984249