Well, there are the thousands of pages of Police Files for a start. Then there is the information that has been released by Scotland Yard since they re-opened the investigation. I won't bother mentioning Kate McCann's book as that tends to elicit sneers of derision when cited as a source of information. Do you think Amaral's theory presents a coherent and plausible explanation for Madeleine's disappearance?
I am not familiar with Amaral's thesis except in the broadest terms, not having read his book
Broadly speaking, then, he believes Madeleine died in apartment 5A as a result of an accident, doesn't he ? ... and that an abduction was staged and her body disposed of
The fact that a cadaver dog alerted in that apartment lends plausibility to her death in the apartment and the fact that the window was opened from the inside might be said to lend plausibility to the suggestion that an abduction was staged
As to the parents disposing of their dead child's body, I can't think of anything that makes that part of his thesis plausible ... it seems incomprehensible to me that these clearly loving parents could carry out such a callous and cold hearted act