There are plenty of federal prosecutors and judges who know how to handle classified evidence in court. I can't remember his name off the top of my head anymore, but I recall when I deep-dived into the Gitmo suspects and military tribunals a long time ago, there was a judge's name who constantly kept popping up in the paperwork of related terrorism cases. Seemed like he was one of the designated "terrorism judges" who had the clearance and authority to review classified intel and info and make determinations on what can be used and presented. I believe he is from the Virginia district courts possibly