The Supreme Court wasn't rejecting the principle of the presumption of innocence, it was rejecting a specific claim made by the McCann's lawyer.
They claimed that the McCanns were entitled to the presumption of innocence BECAUSE the archiving dispatch cleared them.
The SC judges responded that the archiving dispatch did not clear them THEREFORE their claim was incorrect.
The question remains were they entitled to the presumption of innocence, even after making the wrong claim ( not withstanding the Archiving Report had its own errors in it).
Amaral and the PJ were investigating the case as to a criminal activity, yet the claim for damages was a civil matter. So if GA claims the McCanns were guilty staging the crime scene and getting rid of the body, he is talking criminal acts committed by the McCanns. He claims it and he thinks he has the proof, does he worry about their right to be presumed innocent until proving guilty in a court of law?
Doesn't seem like it.
SC say he is allowed to do that as part of his freedom of speech.