I disagree Eleanor, the sad fact is that Operation Grange has not managed to progress this investigation at all despite the substantial resources afforded to it. Madeleine being abducted, sold on and living a new life is pure fantasy imo. Like Ben Needham, Madeleine's fate will probably eventually be revealed as nothing more than an unfortunate accident.
Investigations come to a conclusion one way or another. It looks convincing that the police theory about Ben Needham's death was spot on; a situation which his family have accepted and which hopefully let them get on with their lives despite having no body to bury.
Corrie Mckeague's family are less content. The search for his body has been called off although the excavation will not be infilled until after a police review and I think some incinerated waste is to be sifted. Intriguing that a pre-nineteen forties skull was found ... wonder if that was the result of foul play and if the police will try to identify who it was?
In both these cases everything has been done that could be and they both reached a conclusion of sorts. The police seem convinced Corrie was conveyed to the landfill site but just can't be found.
On the other hand, I don't think Scotland Yard are ready to call quits on Madeleine McCann just yet. I'm hoping that is more than they are just tying up the loose ends ready for the next cold case review in future years ... I'm hoping there is a firm goal in mind.
I don't think there is anything accidental as far as Madeleine is concerned ... I think she vanished as a result of intervention ... and I think that is what SY is working on.