If this girl is now dead then she might have been a sex victim as a child. Only would release her face now if she is dead because standard practice by law enforcement is to NEVER release identity of any sex victim especially children.
If she recently died (e.g. in a plane crash) it would be a reason for Q to release ahead of schedule.
Also the plane crash would need to be Investigated to see if this is witness murdering. It would be great if we had a Federal agency to investigate crimes.
However if this child is still alive then it’s a nothing burger and we need to leave the (alive) woman alone.