I've got no idea whether the Germans have bothered with the PJ files or not. I asked the question because you insinuated that they may have. I have no reason to believe that the people involved can read and understand evidence written in either Portuguese or English. You seem to see the prosecutor and the BKA as interchangeable, but I don't.
According to Jon Clarke, Wolters had neither ownership or sight of the videos and images found at CB's warehouse. They were found and dealt with by Saxony police and Wolters told Clarke to speak to them if he had questions. (page 318 of Clarke's book) I don't think the investigations in Germany are as streamlined as some think they are.
You have "no idea" if the Germans have bothered to look at the files. That just tells me how naive (or in denial) you are. That you think it's possible they haven't, says it all. The most obvious defence case that the Prosecutor is likely to come up against is the "parents did it" theory. If you believe for a moment that they have not investigated the evidence contributing to this theory, you do not understand what a Prosecutor does.
You say you have "no reason to believe the people involved can read and understand evidence written evidence in Portugese or English".... honestly, I could write an essay on how ignorant and ridiculous that comment is. It almost doesn't deserve a response but I'll humour you and point out that 56% of germans are English speakers. I have to say again though, I'm astounded in your defiance to believe that these investigators must know less than you do.
I don't see the Prosecutor and BKA as interchangeable, because unlike you, I understand what their roles are. However, for the purpose of who the "investigators" in this particular case are, they are in effect interchangeable in this discussion. You keep talking about the BKA as if they are the presiding authority, as if their opinion is of a higher importance than the Prosecutor's office. It's not. The Prosecutor has overriding authority in the case they are investigating. The problem is that you simply do not seem to understand the role of a Prosecutor in Germany. They are the ones who lead the investigation. They are the ones directing the BKA's activitities in THIS PARTICULAR CASE. No, they don't run the entire BKA and Wolters team doesn't have overriding authority over the BKA or investigations taking place in other cases or geographical areas in Germany. But they ARE in charge of the MM case. And the activitities the BKA are undertaking are coordinated by the Braunschweig Prosecutor's office in this case. And all the evidence the BKA have, is passed directly to them. In addition to this evidence, it's worth noting the Prosecutor's office are possibly privy to information from other external agencies that the BKA are not. As well as information uncovered from their own investigations.
And yes, I've read Jon Clarke’s book. I notice you omitted the part about Jon thinking Wolters was not being genuine about what he claimed not to know. That he thought Wolters was giving him the brush off, on this and other aspects he asked questions about.