King airway is for peri-hospital airway management, mostly for EMTs out in the field. It was made for simple ease in less experienced hands. It isn't part of the ASA difficult airway management algorithm. Why would they even use this here in the ED? If you can't DL or VL, then place a SGA with gastric port. Success rate is fairly high. You can intubate through the new generation SGA's., either blindly or with FB guidance. Aspiration risk remains low. (When I say SGA I mean devices based on LMAs)
Obviously maintaining oxygenation/ventilation is paramount, but after you've established that it seems careless to transfer the patient without establishing more definitive control of the airway. Is this a standalone ED? Is there anesthesiology in house?
NOTABLY, there is NO mention of whether they were able to mask ventilate the patient before the airway was placed.
As others have mentioned, hospital banning use of paralytics is institutional malpractice