Back here on earth, USA Senators from both parties regularly accuse Assange of all manner of perfidy. They've all got incriminating shit on file at the TLAs, and regular whinging about Assange or Snowden or whomever is table stakes. When Bloody 'Gina gets her hooks into this guy, who besides Rand Paul will complain?
Any links to famous cases, or is it all secret squirrel that we can't be trusted to know about?
It is fairly common for indictments of persons not already in custody to be sealed initially if there may be issues with effecting arrest, and sometimes for other reasons (e.g., to avoid compromising parallel investigations). The grand jury process is intended to enforce probable cause requirements, not to provide notice to the accused so that they might better flee arrest.
Several of the indictments by the Special Counsel’s office, for some famous examples, were originally sealed.