Independent arbitration boards are one way. If arbitration failed, and it had to go to court, it should have been an issue of which ones of the two family parties would make the best guardian for her care. It should never have been a decision about pulling the plug when there was no living will.
When any family member disagrees with pulling the plug, and especially if they are willing to provide that care themselves, it is clear who should have been given guardianship.
--tully