I suspect you are right ....more digging for reliable clues at home is required.
1. IF you were named the benificiary on retirement accounts, in theory GA has some specific limits on how/if a POA can change that ..and in general it's a conflict of interest for a POA to make a self gift of persons assets ...but requires digging to sort out who might have done what .
2. IN theory IF you were named in a revocable trust the trustee should have advised you ...but it's still possible the terms of the trust allowed trustee to invade corpus on a liberal basis ...and somebody did so ...if you know who drafted trust you might get a prototype or draft of same that provides big clues...the draftsman probably has no duty to help or share ..be nice ....if you are not named then the draftsman may have a duty to keep quiet ...also a big clue ....
NO probate is a big clue that pot was empty or everything bypassed probate .
ITs possible Mom blew it trying to sort out brothers problems ...but we don't have solid clues as to who had proper powers to do what. ( I know of some pretty hefty trusts that were drained in futile attempts to cure or sustain a wayward lifestyle )
Yeah - so more digging - or just asking. I know nothing was probated bc "everything was taken care of with trusts" as per the lawyer who witnessed grandmother's will. He was very nice and told me probably more than he had to tell me. I might call the other broker and ask to see the beneficiary pages from the retirement account even though he's no longer in charge of it.
I guess maybe the trustee was allowed to make changes as she seemed fit, although that will make it harder to deal with her for the holidays.
And even if my mother drained the accounts that were in my name, I'm not going to sue her (and what would I sue her for if the money is really drained) but it would definitely cause some issues! I'm really guessing she drained it "in futile attempts to cure" my brother. And that's the only thing that makes sense in all this.
I appreciate you helping me think this through and all the advice given. If I find out anything concrete I will update this thread.