I remember reading in a book, I don't remember which, words to the effect of:
"You do not mourn because you are sad that they died, you mourn because you will never see them again."
I'm kind of butchering the quote, and I've phrased it horribly, but what it gets across is that you're mourning for you, not for the person who died. And I don't completely agree with it, but I feel that might be the case for these parents. They need to accept that they will not see their daughter again.
On the subject of lots of other kids getting lost: Not every kid can be told about in the news, and it would be wrong to not report it at all, at least I feel, because it is a great tragedy. Plus people who pay attention to the news gobble this stuff up. At the point where that's all that matters, well that is the media. Get used to it, because it isn't going to change for posting about it in a forum.