Brother won't produce the POA. She has been there for at least a week in a sparse room with no tv and for the first few days he took her cell phone. He also put a restriction that she was not to leave the facility unless with him. (We did not know this). We took her out one day to eat and to bake cookies for Christmas. My brother called the police. (Which went nowhere). The day after he went to her house and changed the locks because we took her out. If he has a POA I think he is usurping his authority. My mother is forgetful and may have very early stages of dementia (although again I have not been given much info here). She is capable of saying who she wants to be with; recognizes everybody and can tell you all the birthdays of her children and grandchildren.
I need to know what rights do I have as a son? There are only 2 siblings, me and my brother.