Let's walk this through logically step by step.
Local LE, i.e, the CCSO, signaled very early on that they did not believe that SM had disappeared herself.
LE also publicly dismissed the idea that a mountain lion had attacked her.
If local LE wasn't on the up-and-up, they would have embraced the bike ride story, and concluded that she most likely had either wandered off into the woods injured and then succumbed to her injuries, or been attacked and carried off by that mountain lion seen in the area.
They would have done a few token searches, and then that would have been that.
Case closed.
That wasn't the CCSO's behavior here, though.
Instead, Sheriff Spezze called in BOTH the CBI AND the FBI very early on in the investigation.
He also mustered a vast array of resources from surrounding cities, counties, etc., as well as non-LE organizations, including, more recently, Necrosearch.
They searched the home on multiple occasions.
They dug up a foundation on a separate piece of private property.
If someone wants to explain to me why a LEA that had no interest in finding a missing woman and/or for some unknown reason wanted to coverup that crime would actively solicit the involvement of all these numerous outside agencies to assist them in their investigation, I'm all ears.
All ears.
Just make sure the explanation makes sense.
JMO.