Just had a thought, prompted by
@dbdb11 's recent post that he doesn't think she got lost in the desert and that he thinks the clues are not even in the desert.
I was trying to narrow down what this left as a realistic possibility, especially since he's said he also thinks there are photos proving she was indeed there that morning.
That prompted this idea. I'm not advocating it or believing it, just wanting all configurations this side of alien abduction to be at least thought about by all y'all reading here.
So --
What if BT was there that day as claimed.
What if something happened and she died. Accident, violence, whatever.
And then what if she wasn't left there, but rather her body was removed?
But not by RT?
Or at least not in the new truck/5th wheel, which have presumably been searched and cadaver dog sniffed and presumably found clean?
But by some other people or some other vehicle that is not on LE's radar?
I cannot presume that the truck and RV were searched. While I know it's within the realm of legal possibility, given that it's California and especially given the large number of disgruntled person lawsuits against SBCS, I don't think they'd do that without permission or a warrant. LE who were seen to be taking advantage of a distraught, elderly, possibly heat-exhausted man to search without a warrant....are not going to get anything from that search admitted into court. MOO there, but it's a strong opinion. If they did search the RV and truck, that's not been released to the public and apparently did not reveal a body, blood or anything else to suggest a crime had been committed. RT would be arrested by now.
I think they did not search it, sadly.
I am not sure there were cadaver dogs there that first day, either. There were sniffer dogs, but cadaver dogs are more rare. The next search, I'd think, would certainly include them and perhaps they were out there on the 4-5th day and later, but by then, RT and his RV were gone.
I take DB's comments to mean that he doesn't think she got lost. He thinks there was foul play, not desert misadventure. At least, that's how I take it. Let's say the couple had a fight, and that fight occurred not where RT says he last saw Barbara but further from the RV (let's say at the hilltop - more than a mile from the RV and requiring exertion to get up there). Barbara, perhaps fearing for her safety in remaining near RT, takes off into the desert and RT does not go after her. That's not "getting lost," that's "running from a threat."
As
@wary just said, if Barbara went only a mile further out into the desert, the size of the search area increases by a lot, especially for a grid search. It could easily be 28 square miles (the number of volunteers needed would be 4-5X what they had, there are only so many and they could only work during certain hours).
And to address the footprint issue: yes, there were footprints in the (graded) parking area, which lacks the protruding rocks and the hard packed desert pan that the trail may have. There are far too many footprints in the parking lot to be forensically useful, at all (same with the tire tracks). What would be useful is seeing a footprint just off trail. If there are photos showing that Barbara was out there, they don't need to spend their time trying to see two pairs of footprints (which would reveal nothing about timing - whether the two were together or separated while walking).
I think going through the "lost" scenarios serves only one purpose (if in fact, Barbara was attempting to flee some circumstance in the desert, rather than merely being disoriented and lost), and that is to consider what, exactly, a person does in the desert under that circumstance. What would her strategies ultimately be? Because that could create a new, plausible search area.
For a fantastic read on what it's like in the desert, when you don't have water, get hold of Edward Abbey's Desert Solitaire and read the chapter on water.
As it turns out, one of the things the Sweeney Desert Studies Center is doing (along with other researchers) is finding and documenting all the springs, seasonal and otherwise, out there. Abbey's book talks specifically about July and how very different July is from May or June.
So, my mind comes back to the perfect storm of the timing of this ill-fated trip to the desert. Hot, but not 115F hot, so many people would think they would be okay with 104-105F (when of course, dehydration would occur pretty quickly). One person (RT) apparently carries all the water and other supplies (if any). No whistles, no wilderness essentials. Barbara wearing something ill-suited to rock scrambling or going off trail. Hiking in mid-afternoon rather than morning or early evening. One of the parties has an upcoming trip that involves worry about an ailing relative. Barbara has to get ready for two trips (the camping trip and the international trip) simultaneously. She is not tech savvy and has to travel internationally without a cell phone. Both of them were, IMO, stressed that day.
Anyone who lives in the desert knows that desert searches in the summer are often unsuccessful, that scent can be lost, etc, etc.