You give away your blatant lack of logic.
Two scenarios
CB named as prime suspect with little info given
CB named as prime suspect with a claim of concrete evidence.
The claim of evidence supports the claim of guilt and is therefore evidence..it depends how much credibility the BKA have to determine the strength of that evidence... But it's still evidence. As Angelo has pointed out it seems you won't accept that purely because it puts the mccanns in the clear.... And of course proves Amaral.. Grime.. The PJ and a host of others wrong
If there was no evidence linking Brueckner to the crime perpetrated against Madeleine - quite simply - he would not have been classed as suspect.
If there had been evidence which eliminated him from the inquiry - like the very many who fitted a similar profile to Brueckner and who the process eliminated - he would not be classed as suspect.
Operation Grange did express an interest in him in 2013.
At that time it is possible that Brueckner did check out because there was no known evidence at the time which linked him to Madeleine's case.
That situation altered when evidence became available in 2017 and continued to be presented into the present which resulted in Brueckner becoming the prime suspect in the crime against Madeleine McCann.
Does that sound like the patsy of prejudice? Not to me it doesn't. It sounds like dogged evidence based police work which followed procedure to build a case.