If the premise is that someone in a position of authority (and though Amaral may have resigned when he published his book and did his video he was nevertheless world famous as the cop on the McCann case and therefore an authoritative figure) endangers a fair trial by publicly accusing another of a heinous crime, then very evidently the McCanns would not have received one. I wish for once you would answer honestly, is it too much to ask?
Unfortunately you tend to set the terms when you ask a question. For example;
Where was it announced that Amaral was in a position of authority, world famous and an authoritative figure? They sound to me like your personal opinions rather than facts.
Secondly, did he publicly accuse the McCanns of committing a heinous (your opinion) crime?
There is another way of looking at things;
The defendant Goncalo Amaral...states, synthetically, that the book was written mainly to defend his personal and professional honour, that the claimants were the ones who breached the reserve of their private life and the rights to image and good name, and that the book and the documentary describe the facts contained in the investigation.
page 7
http://miscarriageofjustice.co/index.php?topic=6307.0He told the Appeal Court;
The book, documentary and interview involved in the autos have as main motivation the defence of Gonçalo Amaral's personal and professional honour.
The respective contents (book, DVD, interview) do not offend any of the claimants' fundamental rights,
. neither their privacy, such as articles 80 (3) and 81 (4) of the CC (Civil Code) define it and describe its effects, insofar as they themselves voluntarily limited / alienated such right by multiplying interviews and interventions in the media organs.
. nor, in the same way, their image and reputation, as they themselves placed the matter in the public area and gave it a worldwide celebrity, opening the doors to all opinions, even opposing views.
. nor, furthermore, all the guarantees of a criminal procedure, namely a fair investigation and the right to liberty and safety (5), as the respective contents of the book, documentary and interview describe the facts included in the investigation.
page 1
https://www.gerrymccannsblogs.co.uk/Decision_19_04_2016.htm