I think Holly Bobo may have been moved from where they first her left her body. Dunno if it was in reaction to announcement of a search. LE could be hoping to motivate someone to try and do exactly that: take action that will lead them to Jayme.
It is possible that Abby and Libby were moved in the Delphi murders. The bodies were not found during the first search of the area, but a second search in the same area produced two bodies.