Stop the money first. Investigation comes after.
For active fraud, only the bank can stop pending transactions in the next 90 minutes. Adult Protective Services investigates and matters, but slower. Hit the bank, the credit bureaus, and the police in that order, then loop in Adult Protective Services to document.
Call the bank's fraud line and ask for an elder protective hold
Freeze credit at all three bureaus
File a police report and the FTC report
Then call Adult Protective Services to document
Lock down the attack vector before the next call
After the immediate hour
Once the crisis is delayed or stabilized, you have time. Take the standard quiz to get curated picks for the longer arc. COPES eligibility, your AAA, family caregiver support, what to set up before the next round.
These scripts are paraphrased from caregivers who have been through these situations on r/dementia, r/AgingParents, ALZConnected, and AARP. They are not legal or medical advice. The LTC Ombudsman, your AAA, and the Alzheimer's helpline are all free and can advise on the specifics of your situation.