I'm not familiar with the case, where were the girls hidden?
IIRC, Both were found on Weaver's property. One of the girls was found in an outbuilding--the other under a concrete slab :frown:
A private investigator (also step-grandmother to one of the girls) helped to crack the case and I believe she wrote a book about the murders.
http://www.msnbc.msn.com/id/11065622/page/2/