Regarding this part:  "Naunton concluded that Tutankhamun was killed in a chariot crash: a chariot smashed into him while he was on his knees, shattering his ribs and pelvis."   

 The injuries seen on the virtual autopsy  showed Tut's left clavicle was undamaged; a wheel traveling over his left side  that crushed his pelvis and heart would have continued on to crush his left clavicle.  Instead, the actual damage to his pelvis and heart may be from a horse stepping on those parts of his body which would have left his left clavicle intact  but his pelvis on the left side and heart crushed.    carecare7