The problem for me all along has been the trip timeline and gas.
DT did an excellent job of breaking down the math and making it easy for a juror to understand IMO.
1) To believe he made the trip from Raleigh to Hillsville to Raleigh to King JY would of had to get way better than 20 mpg or have to run tank to empty (22.5 gallons) to get his normal 20mpg avg.
2) There is no record of him getting gas after the King visit (theory), so he would of had to get 30 + mpg to make it to the gas station he actually stopped at later that morning.
3) He would have risked being caught on numerous traffic cameras on I40.
4) He would have risked stealing gas in King.
5) He would have had to average 65mph (risk speeding in portions of trip) to make the trip in around 2.5 hours.
6) If he makes trip in 2.5 hours, JY had 1 hour to strangle and beat MY to death, tear apart closets, throw around ebay and progress papers, grab jewelry, put CY in bathroom, probably get dog out of the way, change clothes, bag all dirty items, clean CY, drug CY, tie up loose ends at scene, and discard dirty clothes somewhere between Raleigh & Hillsville.
Combine all this with the fact that LE has NEVER been able to find a corroborating witness from King gas station (even though there was supposedly a regular customer present that witnessed the entire scene) and it adds loads of doubt.