Patrick Byrne. Fits his early interviews. They never thought she would lose, so they had a plan to keep her under thumb. It would need to be independent and less incriminating than what her and Obama were involved with together so she wouldn't burn the whole house down.
The same structure can be used against either Joe or Kamala. The whole don't touch Obama care is a red herring. The FBI dudes wouldn't be told that it was to sell out the US to a foreign country. They might actually remember their constitutional oath.