If a Power of Attorney is valid?

If a Power of Attorney is valid? One of the witnesses that signed the POA stated there was no notary present at the time the principal signed this document. But it was somehow notarized later.
This POA was used to obtain $300K plus. Is this POA valid? If no notary was present?
The principal of the POA was an elderly person, age 66, in hospital, disabled from stroke in brainstem.
Wouldnt these actions taken with the use of the POA, fall under Finanical Exploitation of the Elderly, White collar crimes such as Bank Fraud, Embezzelement, Forgery and Larceny?
I hope you can help me. I feel like there are laws broken, but no one will tell me where to go to for help. Or how do I report this?

Joint Accounts of Elder Relative I have an elderly single relative who has all…

Joint Accounts of Elder Relative
I have an elderly single relative who has all of her funds in certificate of deposit accounts and savings accounts. All of these accounts are in joint ownership with different relatives.(none of which are a spouse) Are all funds subject to designation to a nursing facility if and when the time comes? Is it possible only half of the money will be turned over? She does not have a power of attorney nor a will. I

Power of attorney.

Power of attorney.
What are the duties and powers of power of attorney,with respect to an elderly family member(care responsibilities of that elderly person) and the other children in the family.

info on elder estate I have a friend who has property in trust to him from his…

info on elder estate
I have a friend who has property in trust to him from his girlfriend of 25 yrs . He forgot what will happen to her if he dies first, he has asked me to become her guardian and wants to give me power of attorney to take care of her in case something happens to him. She has no family. He also wants to give me her house if she dies . iI am have no idea if this is going to be a problem . He is 87 and in very good health and as sharp as a tack . She is frail and has mild dementia . He has a power of attorney over the entire estate . I am just a friend . I dont want any problems. there is enough money to maintain her home and have a 24 hour nurse to care for her, So what is it I will need to help her maintain her ability to keep her in her home . and since I gave my word to help them both what do I need to do to keep my word and assist them both. He has a family if she passes on and they will care for him . It is her that he is worried about. I don’t like breaking my word . But I am confused on what I need to do. There re no relitives for her and it is very sad.