I haven't read the whole thread, so help me out if I missed something. Has anyone considered that the FBI may be not only looking for new classified emails, but also for emails that indicate intent to mishandle classified emails?
I don't think anybody knows. There is speculation that the FBI must have found something troubling for Comey to do what he did, but that is all it is, speculation. All the FBI is saying is that they want to review the emails. I don't think they have even admitted that they actually read any yet.