Are you tracking this case at all?
The man was filmed taking bribe money. They found bribe money in a legal search of his house. The FBI has been investigating up to 8 different bribery schemes in which he was involved. A former assistant has just been sent up the river for eight years for bribing Jefferson. Another person is awaiting sentencing. Jefferson has been ignoring a subpoena for his office materials for eight months.
This all preceded the office search.
How high is your bar for "probable cause?"