A very possible scenario. The parent's not having normal reactions. The phone call to Brenda that is still under seal. The 'kidnappers' had Danielle somewhere, tied up. Could have been bitten by a snake, starved, heat prostration, a number of things could have happened. So the 'kidnappers' then have to let Damon know.
Only problem with this is that ,as far as we know, there were never any ransom demands. And WHY turn the police on to Westerfield, if you have this ransom thing planned?
I think it was something else. I think Damon's "FRIEND" that flew in from out of town had a lot to do with it. Then he leaves right after Danielle's body is discovered. There would seem to be a link there of some kind. Other than the obvious.