Wow conflicting media releases (again). I heard, on KDKA radio, that the child the killer lost was nine years ago, a little girl, and his first born. The reporter then went on to list the ages of his three subsequent children (with the youngest being 1). So according to the reporter I heard, only two got on the school bus. So I wonder where the one year old was, who was watching the baby (or in other words) who else came in contact with this monster before he set out on his assault.
We may never know what happened, but I guess we all (media included) just look for that small red flag that foretell of his plan.