Mueller and his whole gang need to be indicted too! They knew early on there was no collusion yet they kept on going...why? We know why—they were part of the conspiracy!
They won't be. Rod Rosenstein wrote a scope letter that basically said 'go look at anyone close to Trump and try to find a crime'. He didn't limit it to so-called collusion (probably he couldn't because that's not even a crime). It was an authorized illegal fishing expedition. But it's Rosenstein who bears responsibility, not Mueller. And he knows it, that's why he kept that scope letter under lock and key and refused to let congress see it.