If he was deceased out there wouldn’t vultures have been seen , are they not common in the area?
Was there any way for him to exit the trail without going back to the trailhead? I recall another poster stating something about he could have exited via some of the other unofficial trails, something like that. I haven't found that post yet but I remember it.
From what I've heard, vultures aren't tremendously common in that area, that time of year, and bodies may tend to mummify rather than decay, in the intense dry heat. Note that Rachel Nguyen and Joseph Orbeso were out in the open in Joshua Tree longer than Paul has been missing, and no one mentioned seeing vultures.