Here is the most direct route from Waltersboro, SC (A) through Hopkins, SC (B) to Jonesville NC (C) via US Interstates. There really are no "backroads" that would go directly from point A to point C.
I'd love to know where in Hopkins/Richland county the dogs were found, as there is alot of "open area" around Hopkins (such as Congaree National Park and the huge Ft Jackson Military Reserve).
Especially since he seems adept at maneuvering the interstates (he sure got out West quickly!!), I'm
leaning towards him driving the interstates, per my map, and perhaps the 3 hour time difference meant he spent this time around these "open areas" near the Hopkins area...
I can't see him wasting 3 hours... just to dump the dogs....that should've only taken a minute or two. Which leaves us with the disposal of the dogs AND BT (I'm sorry to say) somewhere in that area. Then again, I'd think the dogs would be going nuts if their "master" was in the car with them in a "deceased" state. People passing by the car would notice the dogs acting odd, perhaps? Which is why
I wonder if she was even in the car when he got to Walterboro (A) ... IMO, of course.
http://www.mapquest.com/mq/6-mWLWjKI7