I think that her peeps don't want anyone scrutinizing their lives/partying so don't want to draw attn to themselves. Also, I bet Gma has lowered the hammer and warned them not to speak as she is the "official" voice.
I also don't remember any of Melinda Duckett's friends speaking out (tho neither did her grandparents or parents) I really see parallels in these two cases.
Funny you mention Melinda Duckett...I was just thinking about that case while I was typing. Don't you recall the friend who had all the 'stuff' about Josh and pics of her and MD on her MySpace page, and then the creepy Photobucket (Halloween) pics mocking the suicide, and also how she posted with us on CTV for a while. For the life of me I can't recall her name right now but many of us thought she knew more than she was telling. If anyone recalls her name please refresh my worn out brain.