Like most here, I believe BL killed GP, sadly, ending a very toxic relationship. My perceptions, like others, are guided by my life experiences. But part of what I like on WS is to separate my personal biases from the interpretation of the facts, especially an odd set.
All IMO.
The behavior of BL's family is what forces me to keep reconsidering what may have happened in Wyoming. Why would they be so oblivious to the obvious conclusion that their son likely killed GP and ran home? What did he tell them to make them think this is OK?
Option 1. Could BL have gone on a Snake River hike for a few days as he told the Tiktok user who gave him a ride on 8/29, to get some space between he and GP and let her blog? Was it GP alone in the van on 8/27 when the back door closed as the camper passed?
... in this scenario, what if when BL returns to the van on 8/29 there is no sign of GP? Could she have been attacked or abducted by someone, killed and left where she was found? In this scenario, BL would not know where she was, panic, call Mom, and go home.
... that sounds crazy because anyone in their right mind at that point would call LE, right? So maybe BL looked for GP, found her dead, and panicked because he might be accused of killing her. He calls Mom, she calls attorney who advises he do nothing and hightail home.
Option 2. What if after another one of their toxic 'fights' GP takes off from the van, parked where we saw it on the dashcam 8/27. She leaves to go for a walk to be alone - in a state of despair, crying and confused. In this case, it might be BL who is in the van (sandals on ground match, right) when the door closes between 6-6:30pm.
... in this scenario, what if GP doesn't come back that night, and BL starts to get worried? He goes looking for her the next day, and finds her in the creek bed where LE found her. She has committed suicide. He panics, calls Mom, she calls attorney who advises he hightail home. All this under the guise of making sure he doesn't get blamed.
So as off the wall as this may sound, perhaps the BL family doesn't think he did anything wrong, at least of any great importance, '
He didn't kill Gabby, they may think... but he sure will be blamed for her death... so we'll welcome him home and help him hide for a while'.
I don't like what I just wrote either, so please no tomatoes. I am just trying to respect the art of sleuthing by turning over the limited data we have, like a rubric square.