I think I would call a professional, or a professional facility, to ask what could possibly be done in this circumstance.

If the person is delusional and paranoid, he/she probably wouldn't agree to getting help, but might. have you tried talking to this person when she/he doesn't seem to be as delusional/paranoid (assuming there are those times)?

I still think that calling a local professional, hospital, community mental health organization, department of health and human services, etc., would probably be where I would start just to find out some initial options and suggestions.

good luck! please let us know?

kd