I'd like to think they have gone back to the beginning and talked to everyone again. They have had enough time, that's for sure. But I doubt very much that stories, from children especially, will get any clearer with the passing of time. Part of the problem is not knowing if you can believe various media sources, as I remember reading at least one that indicated TH was the last "adult" to see Kyron, while the rest all said, as did LE when they spoke way back when, that she was the last "person" to see him. I don't know how they could wade through the various accounts from the kids with any level of certainty.