Is this a case of Medical negligence an is there an attorney that will sue on my behalf?

He thought she needed more medical care and your mother removed her anyway. The facts are that most nursing homes will not take patients who doctors say need to be in the hospital longer. Your mother went against his advice and found out what he said was true. It is not blackmail when it is the facts of the case. Also not negligence when he wanted to treat her and your mother refused to allow it. The only one in the wrong here was your mother who thought she knew more than the doctor.