Why do you need credentials.
I never argue by authority. Persons who do so are invariably incompetent, Doctor.
The issues are 2:
1) The girl is not a corpse.
2) Does the family have the right to decide on further treatment? Sub-issues arise from the answer to this.
The family does have the right, but they have not filed the appropriate paperwork nor found a facility. Have you no reading comprehension skills? Sheesh! Since they can’t find one, why don’t they make arrangements to take her home? Oh, that would mean mama would have to take care of her. Since her mom indulged her to obesity by failing to cook and exercise with her therefore preventing this entire issue anyway, I’m doubting mama wants to take care of her now.