I just want to post two thoughts I have:
1) Many people look at the perp's "knowledge of the local roads" as evidence that he is a neighbor or lives in the area. This might not be the case because all it would take to become acclimated to the roads is a GPS, telling you which way to turn. This combined with someone driving into the area, checking out the house, landscape and schedule of the Bobo's activities for a few days, could mean that the perp did not need years of local knowledge to plan and carry out the abduction.
Case in point - "The person responsible for Holly's disappearance lives in the area," said Mark Gwyn, director of the Tennessee Bureau of Investigation. "Because of the terrain, you have to know where you're going, entrances and exits. " -
Taken from this article about the case
2) I believe the school she was enrolled in is the
University of Tennessee Martin Parsons Center. It is a newer facility located at 975 Tennessee Ave N Parsons, TN 38363-2954. I found it interesting that this school is located on TN-69 about 1.3 miles south from the location where searchers found some possession of Holly's on the side of TN-69. Could this mean that the perp had a reason to go into the TN-69 area immediately after the abduction? Say to go to class as an alibi? Just a thought.