So, I hate to bring it up this way, but here's my theory:
We know JD's Suburban was seen driving away from her house at 10:25 am, presumably driven by FD with JD's body in it per the AW. He would've transported her body into the Tacoma and abandoned the Suburban where it was later found. Between the drive to the park and moving the body, he likely left NC around 10:45 am. The Tacoma is seen returning to 80MS at 12:22 pm, which is almost the exact driving time from NC to 80MS. So the body was at 80MS for some duration of time unknown.
According to the AW, when EE came to get his Tacoma back, MT and FD were in the driveway and claimed to be "cleaning" the house. I would assume nothing actually happened in the house since LE didn't seem to find any usable evidence there. This is where I'm stuck.
When did they dispose of the body? If you go by the Alibi Scripts, they kept track of 5/25 as well, the day after JD disappeared. Does LE have a record of their actual movements that day? Either way, why keep track of that day if nothing criminal happened? If she wasn't dismembered and dumped on the Hartford Odyssey, the her body was likely hidden on 5/25, not the day of her disappearance. Hopefully LE can account for some of their movements that day, unless she is somewhere near 80MS of 4JX.