Wexford,
I'm not sure whether you're saying police should have asked for information hours earlier than they did? If so, fair enough.
I think they must have asked sometime during the first day or night, if this post is the original and the date was Australian (not Facebook/US time):
View attachment 256359
- screenshot of "Please share: Have you see three-year-old William Tyrrell?" NSW Police Force, Facebook public page photos, 12 Sep 2014 (I think a direct link won't work, but for me an internet search for "nsw police force facebook have you seen william tyrrell" produces a link at the top of results).