@ diSetter...
Call it what you want but it is still a tragedy for all involved.
I'm sure the two drivers involved feel more than terrible about what happened. It is something they are going to live with for the rest of their lives.
In any case I agree with you that the little girl's body should have been moved out of the way and put in a better and safer location as to avoid this tragedy.
I also think that more care should have been taken in checking her out to see if she was indeed alive.
My comment/suggestion about ground markers was a means to facilitate the location of bodies (whether alive or dead) just in case it was SOP for a Fire department's post crash investigation not unlike a police investigation at a crime scene where nothing is moved.
Hopefully a full review by the SFFD and other agencies will bring about changes to their SOP as to avoid this in the future.