difficult to recover certainly any avionics or any important wreckage information. for the victims on the plane, we won t be able to tell whether they had any signs of oxygen deprivation. reporter: and we have new information just in for our colleague, pete munteen, citing a source familiar with the military response to this incident saying that the pilot was observed slumped over his seat during the course of this flight. investigators now looking at hypoxia as a possible major factor, a condition that causes pilots to become unconscious if they re not wearing oxygen masks at a certain height. do planes this small have black boxes, and if so, are investigators looking for one? reporter: we re told, jake, that investigators are at the site looking for black boxes. the problem here is that this particular jet is not required to have a black box. some of them are outfitted with it anyway. obviously, if they can find something like that, it will be
The study published on May 25 in the Journal of Neuropathology and Experimental Neurology, attributes a specific chemical receptor in the brain as a contributory factor to SIDS.