Mom (85) with memory loss. She is safe in senior living where they do the cooking, cleaning etc. She no longer drives. Things seem good where she is and she loves it there. Only the one brother takes all her social security checks from her checking and now is talking her into only 25 thousand from her investments. I have tried to talk to the bank since I am the POA and also listed as her agent on the acct. No luck! They say she is the client and it's her money to give as she wants. She lives in CA and I live in HI. All the other siblings have moved from CA too. Only the one who lives there in town takes her directly to the bank and gets withdrawals. She can't even remember doing it. Frustrating!
Consult with a Competent Estate/Trust Attorney.
Sandy Jolley, Reverse Mortgage Suitability and Abuse Consultant
PS I am not an attorney and am not giving legal advice. This response is from 10 years experience consulting with consumers and 11 years caring for my aging parents
https://www.agingcare.com/questions/what-good-is-a-welfare-check-from-adult-protective-services-174096.htm
Once you have the letters if the POA is spring you can visit the financial instututions and close the old accounts and open new ones that your brother does not have access to.