So what are you trying to say ? What are the facts as you see them?
It was an accident plain and simple, yes it could have been prevented. Parents are responsible for their children until they reach the ripe old age of 18. This doesn't mean locking up the children in their rooms never to see day light until they are adults. If parents don't want that responsiblilty they shouldn't have kids. Are you saying that the girl should have no rules at all, that she had every right to be riding out in the street at night? As you say, a momentary mistake should not cost the child her life and it shouldn't. That is where the parents responsiblilty begins. Accidents will always happen, no matter how hard we try and prevent them.