There is still the possibility of a third party involvement.
I watched the body cam video and the bf seems calm and collected as well as displaying evidence of physical violence against him by gabby. Gabby seems to some degree out of control.
If I take the bfs laywers presumed defense, given public evidence so far, it seems to me that there is reasonable doubt. I’m not saying the bf is innocent, but more evidence is available to police than to us right now.
The girl gets mad and storms away then takes up with two Lesbians. The BF is pissed tot he extent that he just drives away leaving Gabby with her chosen direction. He drives alol the way back to Florida not knowing or caring what happens to her. A third party creepy guy hanging around the campsites murders the Lesbians and takes Gabby hostage, then murders her, too. BF is so pissed at Gabby that he doesn't want to even cooperate with police since he learns of the murders of the Lesbians with whom he left Gabby.
I think she seemed frantic, trying to control her fear. She was doing all she could to defend him and draw attention away from him. My heavens they were in the same bar/restaurant where two people were later murdered and bodies found two days after this “domestic” situation. So let’s say he murdered the two women, and she saw it or knew about it. If that would be the case he would be terrified of what she might do. The witness said she was outside the van struggling with a cellphone.