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

If in Louisiana, and a family member believes another is incapable of taking care of themselves they can file with the court, don’t know the exact term but pretty much like a tutorship, they will have to provide evidence to show that the individual is not able to care for themselves, like financially, medical, etc. this sounds exactly like that type of situation. I would seek out an attorney that deals with tutorship