He may be the weakest link. If he didn’t have a clearance yet he had admin access to the server his butt may be hanging out.
The leaked info about the internal FBI meeting where the attendees agreed there was sufficient evidence about criminal activity to continue the investigation, should have Hillary and her minions crapping bricks.
It is even worse if he had a clearance. Believe me, everything about this personal server is a violation of the National Security acts.