Mueller has every right to do what he's doing. For someone who argues the simplicity of not being arrested, you sure seem to be overlooking that ni this case. How often have you said, "don't want to go to jail, don't break the law"? It's a simple concept and had Manafort and Cohen not broken the law, they sure wouldn't be in this position, would they?
Are you hallucinating?
I said right in my very first sentence that nobody cares about Manafort and Cohen. It would behoove you to read next time before you respond to what the voices in your head tell you I posted.