Is this a crime I can report? Could I report him for medical neglect?
Edit: She was sick with pneumonia, and I think covid, and was mostly alright when she was taken to the hospital when she was driving erratically. She had very good days at the nursing home rehab, then got taken to the hospital when her condition got worse. My dad reported to me that he told the hospital to not treat her for her illness.
With things like this, it would be best to reach out to a local lawyer. You might be able to find a local organization that can send you on the right path for free.
Whether or not this is a crime will depend on the details of what happened, and where you are located (country & province/state).
Legal advice aside, do you have someone you can talk to about her death? Such as a different family member or a friend?