(CNN) - New video shows what first responders saw as they approached the Asiana plane crash.
It suggests emergency workers saw teenager Ye Meng Yuan's injured body on the ground before she was hit, challenging earlier claims that she was accidentally run over because she may have been covered in firefighting foam.
In footage from a helmet cam, one firefighter tries to stop an emergency vehicle racing toward the scene.
He tells the driver that there is a body in front of the truck.
A California coroner ruled that Ye was alive when flung from the plane but died after being run over by a vehicle.
Ye's parents have filed a gross negligence claim against the city and county of San Francisco, arguing that the emergency responders who spotted her on the ground did not move her to safety.
The San Francisco fire department declined comment on the video, citing the pending claim.
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