That is the question and right now no one can answer it. She says Tommy and Misty called her and told her this stuff. LE has not released those calls and has gone so far as to say they will not. So no one knows if GMa Hollars is truthful or not except LE and those that either called or whatever.
Bottom line though IMO - someone told her something because she got onto the phone and called GGMa Sykes - who admits GMa Hollars called her and admits the she and TN went over to Shell Harbour and walked around in the woods to look the afternoon before the search was even started and before Tommy's lawyer says Tommy met with LE. So how did GMa Hollars know where to look if someone didn't tell her ?