Really? The FBI is trying to determine if a crime was committed? How stupid are they? How in-the-tank for Hillary are they? Shameful.
Simple, even I can give them a flow chart -
1 - Was it marked “Confidential” or above? YES/NO
If YES continue -
2. Was is sent on an unsecured mail system? YES/NO
If YES continue -
3. A crime was committed.
“Was it marked ‘Confidential’ or above?”
It doesn’t even have to be marked. Classification goes with the territory — sender and/or recipient and/or topic.