Jimmy didn't get involved in the inspection of the car; Cage called someone to handle it, while Jimmy drove to the FBI office.
Jimmy found Harten, "Harten, tell the surveillance team they can stop looking for that car, Sergeant Cage has already found it."
Harten, "Eh? It's been found? Where?"
Jimmy sat in a chair, shaking his head, "In North Little Rock, off a road without surveillance the car crashed into the Arkansas River. No suspects were found in the car, and now it's been hoisted out and parked at the county police headquarters. Cage will arrange for an inspection."
Harten nodded, "So now the only clue is yesterday's gunman."
Jimmy, "How are they doing now?"
Harten, "The surgery is done, there's no longer a threat to life, under observation in the hospital, and they can't be moved to the detention center yet."
Jimmy, "Isn't it possible to question them directly at the hospital?"