Same happened with my husband. He got involved with three different scams and lost A LOT of money which has put us in a very difficult place financially. There was no convincing him he was being scammed. A year later he was diagnosed with Alzheimer’s. Looking back, this was the first sign that something was seriously wrong - an out-of-character breakdown in judgement.
The dementia red flags should go up if scams are occurring. Hopefully this will help someone else to recognize early signs!