You really don't know what evidence Hans Christian Wolters has and I think you may be unpleasantly surprised if although I rather think it will be when he decides to press forward with it.
Not forgetting that a great deal of information has come in which all has to be processed which takes time. I think his priority is to find Madeleine whichever 50% category she falls into bearing in mind that without evidence to the contrary Wolters concedes she may still be alive.
In my opinion the only people who have a stake in moving the investigation forward is the McCann family for whom this must be Hell on earth. We are dabblers and dilettantes in other peoples' lives so it really isn't life changing for us as it is for them.
Brueckner is going nowhere for some time yet.
Therefore there is all the time in the world for the Germans to take their time and conduct their case appropriately; and I don't think they are about to be rushed into premature decisions until they are good and ready to proceed.
I think Madeleine and her family deserve that amount of respect.
“ I think his priority is to find Madeleine whichever 50% category she falls into bearing in mind that without evidence to the contrary Wolters concedes she may still be alive.”
I’m afraid your post is contrary. If he does think that there is a 50% chance that Madeleine is alive, and a cite for this would be good, then it’s imperative that he gets a move on and questions Brueckner. If Madeleine is alive the worldwide publicity around him could well panic whoever has her which would put her welfare in grave doubt.
I’m not sure why you think stringing this investigation out is in Madeleine’s or her family’s interests.
