The difference is that in this case HCW says he has enough evidence to show taht CB killed maddie
What he says he has ..and what he has are two different things.
I believe he has hoped for more credable evidence and hasn't got it.
Isnt it strange how they have known about CB for three years, yet only took interest it seems when they thought CB could get early release.
It doesn't matter how credible the evidence is it is whether or not it or all the components add up to proof.
I don't think even a confession is sufficient if one considers the case of Sture Ragnar Bergwall who was known as Thomas Quick
https://www.google.com/search?q=quick+the+serial+killer&rlz=1C1CHBH_en-GBGB802GB802&oq=quick+the+serial+killer&aqs=chrome..69i57j33l7.12808j0j7&sourceid=chrome&ie=UTF-8It is going to be a long drawn out process either to eliminate or find sufficient evidence to present a case strong enough to convict Brueckner.
Who I remind you has been around since 2007 but whose name arose in Germany and Britain only after the tenth anniversary of Madeleine's disappearance.
The German prosecutor as Davel says, undoubtedly has the evidence but is lacking the proof. In my opinion establishing the proof - or not as the case may be - is the hardest part of the job. But I think the determination to get it is evident and I wish them every good fortune in the pursuit of the truth.
They haven't yet spoken to Brueckner so obviously there is no pressure on them to do so. But when they do the result might be interesting.