Goldman doesn't have to worry about that because neither the phone or the girls left the area and then returned.
How could that have even been accomplished? By 3:30 pm on the 13th, Libby's father was already in the area, calling the phone and calling out their names. He also asked everyone he saw to help him search, and immediately there were a dozen people calling out to them and spreading out to find them. Soon there were dozens of first responders, and locals and friends and family walking all around, and many stayed throughout the entire night.
Why and how would a killer or killers return to that area, with all those police vehicles and searchers, calling out loudly for the girls? Do we seriously believe anyone would walk into that heavily watched area carrying two dead bodies, after they had already escaped the area safely already? Who would do that?
Does anyone think the DT is seriously going to try and convince the jury that, in spite of evidence to the contrary, someone killed the girls and then carried them BACK into the area that was actively being searched? Forensics blood evidence says that the girls were killed right where they lay. I am pretty sure there is other evidence showing that as well, like footprints, etc.
And what about the pesky Odinists? Were they the ones who took the girls and returned them? None of the searchers noticed a clan of bearded woodsmen carrying 2 bodies through the brush?