Of course, this raises a thorny issue: How do the agents and prosecutors review the documents for privilege status, if the entire point of privilege is that it's not supposed to be seen by people outside the lawyer's office, particularly members of law enforcement?

The U.S. Attorney's manual proposes a solution to that conundrum: A "taint team." Also called a "privilege team," this is a group, consisting of agents and lawyers not involved in the underlying investigation, brought in to review the privileged documents.

If this sounds like a strange fix, some courts agree, and have expressly disapproved of the government's use of taint teams to review documents, including the federal court in the same district where the search of Cohen's office occurred.

Some courts have even held that where the government uses a taint team, the government bears the burden to rebut the presumption that tainted material was improperly provided to the prosecution. Other courts have suggested that it would be preferable for the privilege review to be done by magistrate judge, and not a privilege team comprised of DOJ agents and lawyers