Of course lie. Lie, lie, lie. But if they are smart they already know the truth. The first rule of an investigator is to always- or as much as possible - know the answers to the questions you are about to ask.
If she had already admitted to living with BF, backtracking from that will be nearly impossible. Validating her arrangement is very, very easy. Validating a marriage is even easier.
Most elders? Let's hope they are leaving them be, but that is not the history I know or one that I see shared on this site, even among recent escapees. Can it be hit or miss? Of course, but once again preparing for a least case scenario that assumes dim witted, disengaged elders is a mistake. A big one. And it is an even bigger mistake for any of us to suggest this as a response to Snow White.
Ignore them. Continue ignoring them. Don't meet or speak with them. But if they make ONE attempt to determine issues associated with a judicial investigation, just one, get a lawyer and prepare a full frontal assault. The lawyer is smart enough to know when to unload on them; that's what they get paid for.
So if they pursue the issue, the lawyer can go full frontal all over the sorry asses. And I don't believe, not for one second, that an elder wiped his ass with a lawyer's letter. That was likely braggadocio speaking. What he immediately did with it is send it, while quaking in fear, to the Dark Lords for guidance.