Who said it was spinning?
All we know is from the pilot observation quoted above, that said the airplane stalled and then rolled inverted before impacting the dirt.
Hmm, stall, roll and it appears to by flying backwards? I can only think of one flight regime that would cause that. I am willing to be that the "hold on, I have another problem" was one engine going inop, he got slow, and VMC rolled/spun in. Ask Doug how that usually turns out.