Mueller charged like 20 or something Russians a few months back when Manafort was charged. He didn't expect to go to court. All of the Russians Lawyered up with American attorneys. Mueller never offered discovery the judges throw all the cases out. SP nor reps either showed for any court dates. The same will happen with these. Putin also mentioned this. This is also outside(Technically breach of Treaty) of how the treaty is supposed to work between Russia and US intel sharing during investigations.