I had forgotten about the DNA testing of 'locals' and I believe 'locals' refers to those live on that road or have been using it to commute into the Blacksburg area. This could still be someone who lives in Blacksburg. That still would be difficult for LE. I've often wondered about hunting that area as my father and I would often scout out the woods in August and September for deer hunting spots. That could mean someone who was in that area for that purpose and could lived an hour away. An hour radius means a large number of people who could have committed this murder. If this was a hunter, I wonder who quit using a 30-30 and bought a new rifle?
What makes many of us believe that the killer drove there is the fact that LE had a list of vehicles seen on the road that day and LE was attempting to ID the drivers. This list was published in the media more than once. In 2012:
http://www.newsadvance.com/new_era_...cle_1aa114d0-c404-5fdc-b393-8691cadc0e78.html
In 2014, LE stated in another article they were still trying to ID some vehicles, but did not provide a list:
http://www.roanoke.com/news/crime/f...cle_b7f4cf7c-714b-5b11-af18-3567d48b02cf.html
I never heard where the empty casings were found or if LE actually found them. But a few years ago a PI used a metal detector and claims to have found a 30-30 case which he turned into LE. He found the casing in the parking lot.
I have a friend that lives about an hour away and his step children went to VT. I was surprised to learn how many residents don't go up to Caldwell Fields and many only went up there for the first time after the murders.
The motive is baffling to me. Why kill them? A sociopath just going for a thrill kill? I doubt it was a serial killer as I don't recall any similar crimes in this area.