I would agree with NT and add that in addition to a POA it would be best that Paul have his will in order and the person with POA also be named as executor of Paul's estate. That party then should be legally empowered to act on Paul's behalf.
I'm no lawyer and one of our lawyers here should be able to advise you. It might not be a bad idea if you know the Sheriff to just give him a heads-up. This could get much uglier than it already is.
BTW, I think your plan really sucks and puts you in legal jeopardy. Don't mean to be so harsh and insensitive, but I don't think you were looking for touchy-feely advice anyway.
Bottom line- do nothing until you get legal counsel - and head the advice!