Thus, therefore, and therehua, the correct way for this to have been done would be for the DOJ to issue a subpoena for any papers related to bribery investigation. A team of lawyers would be brought into the office and would search through the entire collection of papers. Anything that was not relevant is excluded. Anything where the privilege of office attaches, it is put on a "privilege list." Anything relevant is turned over. If the DOJ has issues with anything of the privilege list, the DOJ goes in front of a judge and argues why it would be turned over to the DOJ. If the judge agrees, it will be turned over. If the judge does not agree, it remains privileged.
I have come to learn that the DOJ did in fact issue a subpoena and Jefferson refused to comply with it. While the second part of my response remains the same, Jefferson does have an obligation to respond to a subpoena in a legal manner. A flat out refusal to comply is wrong. I don't know all of what has gone on, but Jefferson should have had the papers where he is applying privilege to put on a privilege list. If the DOJ still wants to see them, they go in front of a judge and ask for a motion to compel. If Jefferson does not comply with that motion, then the FBI has more grounds for raiding his office. This is how it is done for the Oval Office. This is also how it shoudl be done for a Congressional office.
So, at this point, both the FBI and Jefferson appear to be in the wrong legally on this matter. The documents should be returned to Jefferson and then the DOJ should seek their disclosure in a lawful manner.