Hillary and her minions know the lie and “Do not recall” option very well. Hillary did versions of “do not recall” around 250 times for the Whitewater deposition, IIRC.
Yes, and in any investigation that is premised on Clinton, Mills says “I’m her attorney and can’t answer because of atty/client privilege.”
They’re not gonna get Mills on a Clinton hunt. She has to be directly targeted by the FBI as a suspect in her own right.
The destruction of evidence works wonders as well.