This is what I take from the story,
Media didn't do us any favors 'survivalist', murderer, committed suicide, all true though that type of attention hurts us all
He apparently took pictures of his location that was discovered by LEOs at his home enough info was obtained they knew about where he was at
He didn't cover his tracks, location was easily located, the trackers also smelled smoke
He boxed himself in, in an unfortified wooden makeshift hole in the ground, no escape rout
He built the cave from out under the canvas allowing a helo to be use, small explosive device gives access to the inside
From much of the reports not very much water or food was found in the cave/bunker, if one is on the run post-shtf you certainly don't want to trap/box yourself in, he worked on this for almost 8yrs, it was easily found and penetrated. Lucky for us and the community he didn't plan right and done himself in but we should also learn from his mistakes if we are wanting to conceal ourselves when at our BOL