Taieb is a cooperating co-conspirator. That’s why his name was dropped in 2019 from the superseding indictment because he cut a deal very early on in this case, but wasn’t officially charged with a new docket until May of this year.
He signed the following WAIVER OF AN INDICTMENT which foregoes prosecution by indictment with a grand jury:
I understand that I have been accused of one or more offenses punishable by imprisonment for more than one year. I was advised in open court of my rights and the nature of the proposed charges against me. After receiving this advice, I waive my right to prosecution by indictment and consent to prosecution by information.”
He cut a deal to drop 3 federal charges down to one count of a lesser charge, therefore he’ll be testifying against those named and unnamed in this case, hence by virtue of his negotiation/testimony he can not be part of the grand jury case, therefore the single count falls into a new docket.
I believe his case was sealed recently so we may not know anymore details, but I’ll have to double check the docket and get back to you.