That's all very well and good, but they won't have a clue what the defence have. They can only test the potential lines of defence tactics.
As for the defence, of course they will pick the most advantageous way to pick apart the prosecution, given that they only need to introduce reasonable doubt.
Who knows, Ralph Wiggum Herr Fulscher may have the chair fallage evidence he proclaims.
If Brueckner has given his Defence Team an indisputable get out clause it would be rather politic for them to share. In that way he can be eliminated from the inquiry.
Which would allow the police to move onto another burglar and convicted paedophile and rapist, domicile in Luz and phoning from Luz at the relevant time and who apparently confessed to the crime perpetrated against Madeleine in 2017, to be investigated.
Wonder why they haven't done that.
Maybe because the evidence the German investigation holds against Brueckner cancels out the rapist's certainty that they won't find any.