I posted this on the WWWCJD Facebook page, and am posting it here as well.
I put together this map to illustrate what I believe to be the likely route suggested by Bobby Roach (Owner of the South End Gulf Station), and the likely route actually taken by WCJD.
My possible suggested route is in yellow. My possible route taken is in Red.
These routes are slighty different from the route I suggested in a previous post, and different from the possible route that "Mia G" suggested.
"Mia G" suggested that perhaps B Roach directed her up Highway 19. The South End Gulf Station was on the corner of Old Phelps Road and Sam Houston Ave. So if Hwy 19 had been his suggested route, then she would have immediately headed up Old Phelps Road, which leads directly to Hwy 19. The reports indicated that she headed north on Sam Houston Avenue.
Sam Houston Avenue curves northward, and the simplest route to the prison would require that she go right on 11th Street one block, and turn left (north) on University Avenue, and turn right on Hwy 980, which would take her directly to the prison. I had previously stated that it was 20 miles to the prison. This route would have been 15 miles, and would have taken her about five hours to get there on foot.
But for some unknown reason, it appears that she turned left on 11th, and continued northwest on State Hwy 75 (or alternatively up the I-45 Service Road) and eventually arrived at the Hitchin Post. This route would have been a five mile walk, taking about an hour and 40 minutes.
I have labeled the four key locations - The South End Gulf Station, The Ellis Prison Unit, the Hitchin Post Truck Stop, and the location where her body was found.
I don't believe she caught a ride between South End Gulf and Hitchin Post. She had no reason to go that direction.
I think she just got confused when she got up to 11th street and turned the wrong direction. Or perhaps she decided that it was just too far to walk and she'd be better off trying to find a place to sleep and head there in the morning.
As for the location of the murder, there is nothing between the HP and the dump site. No place to stop to kill her, and the logistics of murdering and raping someone would have been very complicated if done in the seat of an ordinary vehicle. He would have had to drive her to a different remote location, brutalize and kill her, and then return to the same freeway onramp next to the HP and dump her just up the road.
I am pretty certain in my own mind that the killer picked her up at the Hitchin Post, and there is plenty of room in a remote corner of the parking lot for a truck to park away from the other trucks, and not be heard.
If she had resumed her trek back through town after getting directions a second time, the killer (probably driving a car because a big rig wouldn't be driving through town) would need to take her to a secluded place to commit the murder. That secluded place would likely be on the north side of town toward the prison. There is plenty of seclusion in that direction. No need to drive back through town a second time with a body in the car. He would have dumped her there.
And if she just got directions from the waitress, she wouldn't have hitched a ride up N/B I-45. For 1 - it was the opposite direction from where she was headed. And for 2 - the killer would have had to take her well beyond the dump spot. And he then would have had to reverse course, take southbound I-45 back to Huntsville, reverse course again to northbound I-45, just to dump her where he did. Very unlikely.
The only scenario that makes sense is that she didn't leave the HP parking lot alive.