When you lose a child it is as if you had died. In fact you would trade places if it were possible. But what gives you the right to say that your values supersede the rights of others. Unless you are personally willing to intercede and take responsibility for the other person. then let the parents handle it.
If they are wrong, ultimately they will be punished. be it in this life, or the next.
What of the girl? Do her parents have a “right” to watch her die and prevent her from receiving medical attention? Does her right to life disappear because she’s a minor? Kids aren’t property.