A history Mystery from Idaho

Okay, I've finally taken the time to read the associated links. Very interesting and as usual, "needs more study."
My first comment on the paper would be: Never turn archaeological material over to the engineering dept! (That's a joke for you engineers---don't flame me, please!)
I must wonder why the tests were taken from an area of the skull that was ripe for contamination. Most of the DNA studies with which I'm familiar are taken from the insides of molars, where no human hand has touched. This is due to the high probability of contamination by handling.
I wonder about a lot of other things as well that would have been explained were this an anthropological report.
Does anyone have a link for an archaeological report on the finding of this skull?
Looking at the university's anthropology site shows 2007 as their last update....