My dear Alice - do you mind if I take that point seriously for a moment? Terribly boring I know but...
My view is that Carlos was somewhat out of his depth, and inexperienced in such matters. Although the criminal process in Portugal is rather more collaborative than the UK system, the police and prosecutor are still interested in getting convictions and not above a bit of fishing.
The PJ also "bent" procedure - they do not have to reveal everything they know to the arguido or representative but they are not allowed to lie. Which the clearly did judging from questions 43 to 47.
The PJ did not lie! Those questions were drawn up not just by the police investigators. They were prepared under the authority of the Ministério Público, who was also in possession of the preliminary reports from the forensic lab, which confirmed Madeleine's DNA in the car boot.
Dr. Carlos Pinto Abreu was not out of his depth, he is a very experienced lawyer. The matter is that he saw the evidence gathered in the case, the evidence that somehow was changed or let us say manipulated in the end, in order to get the McCanns off the hook.