How to ensure my 92 year old grandparents lawyer is not taking advantage of them financially if I am not the power of attorney?

A friend of my 92 year grandparents is a lawyer. He is just now handling their affairs. He has removed my mom from POA, access to finances and access to health info. I do not believe my grandpparents realize this. They also believe he may have had my grandfather declared incompetent so he is now in charge. I and afraid they may pass and he won't tell us. My grandfather has had 4 hospital visits one of which was minor surgery and nobody called us. My grandparents think that this lawyer and his secretary are doing all this for free. BS Do I have any legal way to gain access to any of the papers the lawyer has had them sign? I could go on of a lot of other red flags. What he has done is so unethical and I believe it is all for $. I would like to know if there is any thing I can do to ensure my grandparents are not being taken advantage of.