The source is called, “empty wheel”. Marcy Wheeler, like Heather and Teri, has all the credentials to be an expert in her field and it shows once you start reading her posts. They are really written for lawyers so her posts can sometimes make a bit of what she talks about seem a somewhat unfamiliar but it is not at all impossible to understand.
This is just an excerpt from the the post for which I provided the link.
”There are two kinds of reviews that the FBI will do of this material: A filter review and a scope review (though these words are getting muddled in the coverage, including in this piece, which is the only one that has reported on the process).
The filter review is done by agents who are not part of the investigative team. They make sure that nothing privileged gets to the investigative team.
According to reports — and Bratt’s email to Trump’s lawyers — at least some of the agents who did the search at Mar-a-Lago were a filter team (which makes sense, because they were sorting through the contents of boxes onsite). According to Fox News, the materials on one of two receipts — what I call the SSA receipt — included privileged material.
In other words, the FBI had cause to seize stuff that involves Trump’s communications with his lawyers. That’s not surprising. Among the crimes under investigation is the destruction, alteration, or concealment of materials to obstruct an or multiple investigations. I’ve previously pointed to a number of instances where Trump did that with the assistance of lawyers (I’ve taken out a paragraph of Trump Organization examples, because only government documents were permitted to be seized on the search warrant):
One thing Trump is likely to have withheld is the Perfect Transcript between him and Volodymyr Zelenskyy, which is something Congress was entitled to get during impeachment. That transcript was hidden from Congress by White House lawyer John Eisenberg, among other lawyers, thereby according the transcript a weak privilege claim, but one easily overcome by the obstructive nature of the choice to withhold it.
While one draft of Trump’s termination letter to Jim Comey was ultimately turned over to Mueller (after reports that the only extant copy was one preserved by DOJ lawyers), the Mueller Report narrative surrounding it makes it clear that Trump and Stephen Miller worked over several drafts before the one shared with others. Those earlier drafts were likely not turned over, in part because White House Counsel lawyers advised Trump that these drafts should “[n]ot [see the] light of day.” Again, that’s legal advice, but also proof of documents that were illegally withheld from the Mueller investigation.”
Click on the link to read the rest.
I also provided a link to Marcy’s background from Wikipedia*