The slabs above Mirror Lake may have struck again (along with a case of summit fever). That's the only section of the MMWT where the trail disappears for a bit and you have to find your way along if you've not done it before. Walking down at night, possibly without a headlamp and likely exhausted, I can easily see someone missing that turn to the left and walking right into trouble - and off the slabs.
Hope Mr. Das's injuries are not too severe and wishing him a speedy recovery.
