The below article from April 2021 talks about whether incriminating data uncovered from the Encrochat bust at the beginning of 2020 is admissible as Prosecution evidence in the Germans courts. Certain lawyers were appealing to the higher regional courts that the way the data was uncovered and passed to police is not constitutional with German privacy laws. On the whole, it appears the regional courts have not agreed with that assessment.
In amongst the article though, it mentions CB lawyer and says the following:
The Kiel lawyer Friedrich Fülscher criticizes the "government's eagerness to prosecute" as he describes it. In the opinion of the top judges in Hamburg, the purpose should apparently justify any means. Fülscher, 36, sits in his office in an old town house in the elegant district of Düsternbrook, the walls are adorned with caricatures of lawyers by the French artist Honoré Daumier. The lawyer is considered a specialist for tough cases, defending, among other things, members of organized crime or the alleged murderer of Madeleine McCann , who disappeared in Portugal in 2007.
Fülscher has just sent a complaint against his arrest, in which he attacks the previous case law. "The Higher Regional Court of Rostock demands that the accused provide proof of innocence. But German criminal law doesn't allow that.” If a complaint is successful, it could be painful for the criminal prosecutor. Dozens of criminals should be released despite the overwhelming evidence. But Flüscher has no illusions: "They defend their prey with all means."
EncroChat: Zweifel an Rechtmäßigkeit von Auswertung - WELT
I'm not sure if the above English translation is 100% accurate, can any German speakers clarify what is meant by the bolded sentence in the article or if anyone knows what specific 'complaint' is being referenced here?
Not sure if this answers your question, but it's about drugs, and this I copied says they may be able to use enncrochat, if it's not what you meant, sorry in advance
However, based on the judgments passed so far, investigators are confident that they will be able to continue using the EncroChat files. "The chats are so clear that the defense attorneys have little choice but to take action against the use of the data and publicly give the impression that their French colleagues have broken the law," says Sebastian Fiedler, Chairman of the Association of German Criminal Investigators. "I have the impression that many still do not want to admit how great the threat posed by organized crime really is."