Some of the documents seized were protected by attorney-client privilege according to Fox.
That leads to the question if that privilege still applies when a false declaration has been made:
whoever knowingly alters, destroys, mutilates, conceals, covers up, falsifies, or makes a false entry in any record, document, or tangible object with the intent to impede, obstruct, or influence the investigation…shall be fined under this title, imprisoned not more than 20 years, or both.