Ok here is my current theory
FD trades trucks with Fore employee
FD takes said employees truck to JD home, possibly parks it on the street or some where near by
Waits for JD to return and murders her in the garage
Loads her body into her vehicle and drives away down possibly a rural road (I haven't yet looked at possible exit routes)
Heads down many back roads with fewer chances of being seen and dumps or buries her out at some rural location.
Returns the victims vehicle to the parking lot at the park where it was later found
Calls MT to come pick him up and return him to where he parked the employees vehicle
He takes the vehicle runs errands and returns to his Farmington home where he then exchanges vehicles with the employee
He and MT either go back and clean the JD residence or FD had done so earlier and loaded the bags in the employees vehicle to later tranfer to his own raptor.
MT and FD then go on their journey in the raptor to dispose of evidence in various trash recepticles