I am so sorry for your loss.  And I agree with you whole heartedly about not walking away.  Everything you have written here makes things sound a little fishy.  This "advisor" sounds like a Fiduciary and Fiduciaries are generally have reporting requirements.  Any attorney that litigates matters is a good start but those familiar with estate litigation would be best.  You should interview a few and ask their experience, etc.  You can also call your local Bar Association for a referral.  Good luck.