AZ Probate question?

My father had someone come into the nursing home a week before he passed away with a notary and a new will. The new will was recorded at the Register of Deeds and mailed to the new heir. The previously recorded will left everything to myself and my son.

This new heir also did a durable power of attorney giving himself power to cremate my father.

In a nutshell, my father was cremated, the guy wont pay for it, and had no memorial service. The obit didnt come into existence until i found out all that was going on and called numerous agencies. Then the guy- 4 weeks after my father died does an obit that slammed my father so badly it hurt to read it. It was an article rather than a true obit. The crematory told me that they were informed that no family existed or else they would have had a release from me to cremate.

There is a woman living in my father home who was the caretaker. She has been there a year rent free while my father has been in a nursing home. I am in NC. Help!