re: Neurologist said he is considering filing with a judge to remove my FIL from his finances

On one hand, it can be a good thing that a neurologist can do that. Similar to reporting abuse, the Dr. could be preventing it. If it goes through court, they can make sure that the correct person gets control of the money.

On the other, it does seem like a bit of overreach. I'm a proponent of personal liberty.

I've never been through anything like this, and don't know how I would feel, but I know that myself and my brothers would always have our parents' best interests in mind, and act upon those. Not all families are like mine though.