Don’t worry. Obama will be issuing a blanket pardon for EVERYONE in his Admin if/when we are able to eject him from the White House. NO ONE will ever be held accountable for all the criminality. It’s the way the Dems, with their sycophant Media, operate.
Call them in to testify anyway.
If they have been pardoned they can’t plead the 5th and if they do plead the 5th then you have them on an ongoing criminal enterprise, crimes committed after the pardon.