It's been nearly three years now since the last of the GB4 were abducted and murdered. In six months it will be three years since the GB4 were found.
If I were a family member, I would put everything out there that I knew/know because it is obvious that LE is doing nearly nothing to solve this case.
The last time any LE made a statement, directly related to the GB4, was when they dispelled the rumor re: the landscaper' suicide. The last time they made a statement directly re: Shannan G was that the autopsy showed the COD as unknown.
PIs and web sleuths are the only ones still interested, beyond the family and friends, in solving these crimes. The family members and friends have significant details from before and after the murders re: the girls habits and behaviors as well as who they associated with leading up to and including the days before they disappeared.
MB's BF/Pimp, J Terry could really help.
At this point, why would they not just divulge any details of who, what, where and when the girls did such and such. Even if they don't wish to speak of the manner in which the girls were found (intact or not, dressed or not...were clothes found near the remains...we know they found the tan tennis shoe with white stripes...) the friends and family have knowledge that could only help find the killer/killers.
ALL MY OPINION!