I'm not saying this is what happened, just that it's one possibility.
So it may be a complete coincidence that if you dialed up the FAC on your HSI, but were tuned to the VOR (maybe tuned enroute) the flight track would lead to the approximate crash site position. If one descended to the NP MDA for the G/S inop (which one might believe if unintentionally tuned to the VOR instead of the LOC) it seems from looking at the various charts and IAPs posted here that the flight track would pass very near the crash site. I say again, this is only ONE of several possible explanations for what happened.
As someone already pointed out, it's possible that the boys at the TSB lab know right now what frequencies were tuned in the radios and what was said in the cockpit. Time will tell.