A good article quoting a Journalist turned Professor Jon Silverman. In particular;
“We can speculate for as long as we like – and goodness knows over 13 years there have been so many sightings and tip-offs and false leads – but just because this man is a convicted sex offender and committed burglaries in the Algarve area around the time that she was taken, and the fact that he reportedly said something in a bar in Germany in 2017 which suggested he had some intimate knowledge of Madeleine's disappearance, all these things still remain circumstantial until proven otherwise.
“This is the first time in these 13 long years that the focus has been on one specific individual and this man’s criminal profile certainly matches the sort of person who is thought to have taken Madeleine McCann, so all these circumstantial facts give added strength to the case.
“But I should say that we need to be cautious because there is clearly no conclusive forensic scientific or DNA evidence that places Madeleine in either of his two vehicles that we've heard about, otherwise this man – Christian B – would have already been charged.
“This is the first time in these 13 long years that the focus has been on one specific individual and this man’s criminal profile certainly matches the sort of person who is thought to have taken Madeleine McCann, so all these circumstantial facts give added strength to the case.
“But I should say that we need to be cautious because there is clearly no conclusive forensic scientific or DNA evidence that places Madeleine in either of his two vehicles that we've heard about, otherwise this man – Christian B – would have already been charged.
“The difference between the approach taken by Scotland Yard and the German prosecutor is striking.
For the German authorities to say that they have evidence that Madeleine is dead whilst also admitting that they do not have a body and may not be able to charge the suspect, is both very curious and unusual, and so has re-awakened media interest in a case which may never be solved.”
https://www.beds.ac.uk/news/2020/june/be-cautious-of-new-mccann-evidence-until-charges-are-made-professor-warns/