My brother-in-law has taken control of my sister-in-laws (they are siblings) affairs and has control of all of her money. She has no money to live on because he has stolen her money and refuses to do anything for her. He wants to put her back in the nursing home. He got her out of the nursing home long enough to take her to social security and made her sign her checks over to him. She does not need to be in a nursing home but he is an EVIL man and I want to help her. What measures can I take to intervene?