The location makes sense if EA was trying to go undetected. He could go up 75 and over on 380 which drops him right on Greenville. Both HWY 75 & 380 aren't toll roads. I wonder what brought the detectives out there? Did someone come across the body? A potential tip came in?
If it turns out to be CM, left by EA, he may have simply gone east on Bethany, which turns into Lucas Rd, goes across Lavon Lake, dead ends into 982, and a left turn eventually it hits 380.
No mention yet of how the body happened to be found. Perhaps it was simply someone who happened upon it. I think that's the most common way missing-and-killed get found.