I will dig into this again when I have finished on the "blood spatter" analysis. But from memory, at least in two instances Amaral was working from a report written by a PJ inspector, where an error crept in at the inspector stage i.e. the summary report itself was inaccurate.
I don't know how many instances of this there may be, though I guess I will be compiling a list of such instances from now on.
Due to the sheer volume of diligences, Amaral had to rely on his officers reporting accurately, rather than ignoring their reports and reading all the base material himself.
It is surprising that Mr Amaral relied on such a summary report from an officer probably no better qualified than he was himself to do so.
He had access to the best Portuguese scientific personnel who could have given him an accurate interpretation of the information coming in from the FSS or who could have double checked the officer's report.
Neither procedure needed his direct involvement and he would have been assured he was building a case based on verified accurate information.
That simple procedure would have halted the constitution of Madeleine's parents as arguidos.
However I don't think the accuracy of the forensic evidence was his main priority.
Or having made the original error regarding the FSS report in the manner and for the reasons you describe why has he continually compounded it using every means at his disposal for nine years?