My Grandmother’s Poa Put All Her Money In His Personal Account And Then Died. Is There Any Way For Her To Get It Back?

My elderly grandmother’s brother was acting as her POA (with no successor) and trustee (with no successor) for the last 2.5 years (in Florida). During that time, he transferred all of her assets into a newly created bank account in his name, with no beneficiaries. This was allegedly done to shield her assets so she could qualify for Medicaid. He suddenly died with no will and adult children. I’ve been slowly piecing this together over the last few months and I’m very concerned. I was in charge of her care and finances before she moved to Florida so I knew her financial position before he took over and was surprised to learn she had absolutely no money to her name. I have some limited printouts showing some of her accounts being wiped out and deposited into a new account, but not much more than that. The bank can’t tell me much so I don’t have a full picture. Do I have any legal ground to stand on or is there anything I can do in his probate process to get my grandmother’s money back for her? She’s still alive, but she’s in a nursing home and incapacitated. I’d really like to be able to use her funds to care for her and eventually use it to bury her, but I’m not optimistic. For background, my grandfather is deceased as well as their only child (my mom). My brother and I are her next of kin. We know our cousins (my great uncle’s children), but not well. And legal advice is greatly appreciated.