Open questions:
Who snapped the photo of DK sitting on the hood of her new vehicle?
Was anyone else with them?
If they were together, to where did they travel?
Was the text from DK to DK's Mom really from DK?
From what (who's device) / through where (which tower) was the text sent?
If really "watching movies" .. where?
In a movie theater? .. witnesses?
In a house? Who's? With who?
In a vehicle .. you can watch movies on a phone or tablet these days.
Did DK expire at the discovery location or elsewhere?
If not at discovery, where, and by whom and how was she transported to the discovery location?
Was the key(s) located in the vehicle?
Was the engine running? Radio? Lights? Doors closed?
Were all of DK's belongings found with her, jewelry, ID, etc?
Were any other (suspicious or not) items found in / near the vehicle?
Was the vehicle 'parked' normally or haphazardly on the shoulder / road bed?
Did others witness / pass by the vehicle before Tuesday morning?
Did the two individuals "driving to work" Tuesday morning also drive to work Monday morning?
Was the new vehicle intact? Dents? Scratches? Blood?
Was DK discovered in the driver's or in one of the passenger seats?
Were there signs of trauma? No elaboration required, fill in the blank.
Why multiple jurisdictions required? County boundaries?