Looks like Flynn is next
Man, that Mueller is a crafty fox. He wants to turn Flynn, but the general is a tough nut to crack, so Mueller is also building a case against Flynn's son. The logic is that Flynn gives no fucks and is willing to go to jail if necessary, but may be willing to flip in order to keep his son out of PMITA prison. (And you know they are going to stress that the son will not be in a country club prison.)
I do see one flaw in this plan. As I review the details, it seems that the only case to be brought against the son is a federal indictment, and President Trump can undermine that strategy with a pardon. Mueller can only be sure of keeping the boot down if he can make some kind of case in a court outside the jurisdiction of a presidential pardon.