The more I read over the medical report and deposition of the medical examiner, the more that erroneous ET placement seems to have been a major factor in failing to save her life.
Basically, it made both ventilation and resuscitation a hopeless endeavor, her becoming hypoxic to the point of acidosis and cardiac arrest. This would happen within several minutes after cessation of meaningful respiration.
She did NOT bleed to death. Her spinal transection was quite low T9. That would have left her MID-LOW paraplegic, unaffecting the respiratory and breathing apparatus, voluntary or autonomic.
Here is a problem: if she stopped breathing on her own OR they ELECTED to intubate her because of respiratory distress.
If she stopped breathing, she would have been unconscious, likely in cardiac arrest (though not necessarily). This would not require a heavy sedating or paralytic agent such as etomidate and/or succinylcholine be administered in order to facilitate intubation, . You needn't worry about the patient flailing around or trying to impede the intubation, they are unresponsive and unconscious. You get the tube IN and then a bit later give drugs to sedate or paralyze.
If they did so as an elective 'executive' decision (however warranted), they would have given her drugs that would interefer or inhibit her own ability to breath for herself. At that point, the respiratory inhibition or arrest is INDUCED by the drugs administered (i.e. caused by the EMTs), not by the injuries. If the proximate cause of death was respiratory arrest, that would mean first responder malpractice or negligence as a contributing factor, if not the proximate cause of death.