There's not going to be much need for an extensive investigation, by the look of those pics. Mark another one down to "cumulus graniteis".
It appears maybe another 200' in elevation and they'd have cleared the ridge - with perhaps just a "brown corduroy trousers" moment.
That country looks very unforgiving, it looks just like a lot of PNG. Not the best way to go about filling an order book.
My sympathies to friends and relatives of the deceased.