My friends 16 year old daughter went to Mexico to visit her dad and now she is very ill and in a coma.?

The mother does not have the funds to get to Mexico and she is at all loss on how she could get her daughter back to the states. There has to be something or someone that can help her! It has been 3 days now that her daughter has been in this coma!! Her daughter is a US citizen and her dad to whom she is with in mexico is not even on her birth certificate.