Perhaps not likely because a body has not been found, but what if AW experienced a medical event of some kind, like a heart attack? Considering that AW is 55, just finished a early morning workout, had an early morning zoom meeting, had travel plans and an upcoming wedding to attend, ect, ect. not to mention we are in the middle of a very stressful pandemic .. It could cause someone to become confused/disoriented, maybe AW felt the sudden need to use the rest facilities, or stop the car in an inappropriate place, ect. Just a possibility, imo, speculation.