Amaral wrote a book, he couldn't wait to get his theory out there, he was taken off the case and he didn't like it, it was his theory and he was damned if anyone else was going to get the glory for it. IMO
It might have been the conclusion the Portuguese police made before shelving the case, but Amaral made sure everyone in Portugal knew what the conclusion was and who worked it out. His book was sold all over so the 'Madeleine is dead and the McCann's faked an abduction' story was world wide.
If you want to talk about money [which is all the time] think about what Amaral did for money.
The Mccanns through their court cases publicized the book, and gave it an audience it never would have got.
Now tell me which law prohibited Amaral having a thesis about this case ?
Meanwhile, his financial assets have been seized.
I wonder how the McCann's would like their financial assets seized ?
After all, they have made money from their incompetent parenting.