Funny you mention that...I've questioned that on multiple occasions throughout this 10 months. What is more important in the investigation (during the initial 5 months of searching), building the rock solid case? OR releasing information (if they had any) that could have actually led them to the discovery of the girls?
LE in this case released nothing. Hunters happened upon the body, LE had nothing at all to do with it. It was sheer chance and a blessing from above that those hunters were there that day.
What's more important, building the rock solid case or actually giving up some evidence that could lead to tips?
Without a rock solid case they wouldn't be able to convict anyone for the crime and that individual would be free to strike again.