re: A family member with dementia and telling them they can't drive

This sounds like a post I could written 45 days ago.

Let the doctor be the one to tell dad he can't drive and then get the car off the premises immediately. When he asked about it, just say you're doing as the doctor ordered for his safety, the safety of others on the road, and for your peace of mind.

When the "I'm going to call the cops" threats came, it was really sad, but I repeated that I was only doing what the doctor said was the right course of action for mom's safety, the safety of others, and my own peace of mind.

Good luck. This will not be easy, but some days won't be so bad.