If this person is currently disfellowshipped, then you would treat them the same as any other disfellowshipped person. Also, I know those persons are not perfect, but I don't see how Jehovah would view them as one of the anointed if they are practicing sin worthy of being disfellowshipped. Maybe they were mistaken about being anointed in the first place, or maybe they were and have fallen, and maybe Jehovah would use them in the future, That would be up to Jehovah, and depends on whether they become repentant or not.