Now I know why my parents wouldn't let me drive with anyone in my car until I was 18... Instead of hating my parents at the time, I guess I should have thanked them instead.
Since the driver is under 18, the families of the passengers can and probably will go after the parents of the driver for damages.
But... There is no use in trying to point any blame here as the deed is already done. The only thing to do now is to try to prevent this from happening again in the future. My thoughts and prayers go out to everyone involved.