Wake turbulence
I have read with great interest the many postings regarding this tragic event.
There seems to be general agreement that the two aircraft, which were flying in exactly opposite directions, either collided or passed each other very closely.
I am "just" a PPL, but I do think that there is one aspect of the above collision or near-miss theories that is left out... wake turbulence
Assuming that the EMB passed right underneath the 73 on an opposite course, it would have been flying right in the wake turbulence of the 73, which I believe must be rather considerate. Wouldn't that have caused significant problems for the EMB or at least made an impression on the journalist, who does not mention anything along the lines of violent turbulence.