So as I posted, Richard's son is considered next of kin and will be making decisions for him unless he snaps back out of this. Richard's sister is saying she may move back to town to help take care of him, so what happens if she wants him to come stay with her, but the son wants to put him in a facility? Who gets to decide?
You wrote on your profile: "I am caring for my friend, living at home with age-related decline, anxiety, arthritis, depression, diabetes, incontinence, and mobility problems." You do not mention dementia, so Richard is still free to make his own decisions.