whatever, sounds like a stall spin.
maybe a go around due to being high on the approach...always happens when you are new to landing at a mountainous area airport
MAYBE when going around, improperly secured cargo slid back throwing plane out of CG, causing problems. (remember dc8 in miami, load shifted on takeoff and bam)
it does seem as if the plane was chartered and not owner flown.
I wondered too about the divert to butte...fuel issues?
doctors and airplanes...you old guys know what I mean.