With scores of people being subpoenaed, it is highly likely there are a few weak links among them.
One person the DOJ must be looking at is Christina Bobb, Trumps lawyer. She was the one who signed the letter stating all the documents were returned. She was also at the Willard Hotel, coup headquarters in the days leading up to the attempted coup. She was in the same room as Rudy and Eastman. She knows a lot and would be a devastating witness if she could be turned. Here is something else about Bobb that will blow you away.
She received a masters degree in national security law from Georgetown. She was also a judge advocate in the marines where she gave legal advise to commanders in Afghanistan. She is also a full blown Trump cult follower. You can't make this shit up.
I don't know if Bobb can be turned, it depends what charges she may be facing. The point is so many people are going to be facing serious jail time and it is highly likely some of them will turn to save themselves. Many may have already turned, we just don't know about it yet.