I still haven't said it was impossible. That means I don't believe it was impossible, so it can't be ruled out. Neither can woke and wandered or parental involvement.
I think you are wrong about parental involvement in Madeleine's case.
Both the Judicial Police and Scotland Yard have checked that one out ...
SnipMcCann not suspected in new daughter disappearance investigationThe prosecution has ordered the reopening of the investigation into the disappearance of the English girl. RTP knows that Maddie McCann's parents are not considered suspects in the case's new line of investigation. The ruling is a consequence of the Judiciary Police's proposal and the presentation of new evidence justifying further investigation.
In a statement, the prosecutor added that the Criminal Investigation Judge was requested to postpone access to the case, for an indispensable period for the completion of the investigation.
https://www.rtp.pt/noticias/mundo/mccann-nao-sao-suspeitos-na-nova-investigacao-sobre-desaparecimento-da-filha_v690593The thing is ... once all the evidence has been checked out and there is nothing to connect those physically and emotionally closest to the victim of a crime ... investigators progress to following the next piece of pertinent evidence and so on and so on until it peters out or until leads to a breakthrough.
Investigations are not held open for the purpose of going back and going back and going back and going back over the same ground.
The name of the game is progression and in my opinion that is precisely what the current investigators have been and are doing.
No I don't know what that is but I don't really care about that.
What I do know is that they are not jammed in the time warp of 2007 investigating the same people in a loop ad nauseam, nor do I think that the woke and wandered theory holds much sway since there is evidence that both investigations centred on people with a connection to Ocean Club workers or their associates.