American ambassador to Libya died of suffocation? Really?

  Now that the ridiculous claim has been proffered that our American ambassador in Libya was "taken" to the hospital for treatment, we might ask a few questions.
  Here's the claim:

The Americans were targeted in an attack in their car, trying to move to a safer venue away from the violent protests that erupted at the U.S. Consulate, Reuters reported. Stevens died of suffocation, while the three other personnel were killed by gunshot wounds, CBS News reports.

  A CBS report said this:

Ziad Abu Zeid said Stevens was brought to the Benghazi Medical Center by Libyans Tuesday night with no other Americans, and that initially no one realized he was the ambassador. Abu Zeid said Stevens had "severe asphyxia," apparently from smoke inhalation, causing stomach bleeding, but had no other injuries. 

  This claim is that the Americans were targeted in their car, though other sources say the Americans were being moved to a secure place and that the Libyan leaders told the protesters where to find them.
  The pictures that we see of the body of Christopher Stevens reveal no burns. 
  How does it make sense that one man, still half alive, dies of suffocation from smoke inhalation after being dragged through the streets to be taken "for treatment" to a hospital while the other three are gunned down?
  Photos were released of a burned out car and a burned out embassy but to succumb to smoke inhalation would have taken time, something it appears the ambassador and his entourage did not have.
  Something does not make sense.