Honeybee, I can tell you from experience, that only God can help her. If that means using the native American tribe to which she belongs, then so be it. But try not to think that only her tribe can help her. God often uses many things and people to fulfill His goals in people's lives. Her tribe may just be one of those tools.
I am keeping you in prayer still, as I can't even begin to imagine your loss.
Peace!