I suspect he used improper influence and potential threats to make my 87 yr old Mother sign the new will to make him executor and give himself half of the estate. This was done behind my back without me knowing anything. Recently my Mother came to me and said that she had made a terrible mistake and that she wanted to change the will back to the way she and my father originally had it. She apparently told my brother that she wants to change the will back and due to more improper influence and threats from him she is now afraid and intimidated not to follow through with her true wishes. I feel that this is illegal and possibly criminal on the part of my brother. What should I do to make sure that my mother is free to make out a will without undue influence and threats ?