Personally, and only because you asked what I thought lol.
I suspect they recovered Holly, remember a chopper flew in then left to the Adams property. I suspect they transported her remains to a forensic facility via the chopper and were able to keep it quiet from the media, also they ramped down the search after the chopper left. I feel she was found in the well or buried close to it. They (investigators) were basically silent/absent yesterday, I imagine best trying to figure out how to proceed legally so they can nail these @#$%$ to the wall.
All my opinion......