Help! My mom has been taken advantage of by someone. He talked her out of her savings, sold 2 homes to her way above the value.

He talked her out of taking her of taking her bp meds. She had a stroke monday. He told the hospital she was drunk and on pills. She is incapable of handling her own affairs and cannot remember anything longer than 30 minutes. This was before the stroke! We cannot get her to agree to see a doctor to be evaluated since she is away months at a time with this man. She has in a 2 year period gone through an approximate total of $200,000. Which was left for her by my father who passed away. He also left her with several rental properties along witht he family home which are going to be taken because the property taxes are going unpaid. What can be done to keep this man away from her and have her evaluated before everything is lost and in his possession? Each time it is mentioned to her she looks at us and say" My taxes aren't paid?" PLease give us direction while there is time left.