I've just read the thread and all the news front to back and have a few things that stand out and a theory.
1. Unless I missed it... does anyone know the relation of the local tribal lands with Barron law enforcement? There are three reservations in the immediate surrounding area and I'd be curious to know if they've been spoken with and/or if they historically cooperate with local law agencies? I think this is a REALLY important consideration. If they aren't historically cooperative it could provide a really good shield for someone who is keeping Jayme.
2. All the speculation about the salmonella outbreak at Jennie-O. While it seems far fetched to think this is linked, I have to wonder. No, a company as large as Hormel isn't going to feel a huge loss from a recall of this size and the resultant law suits. HOWEVER, management will have heads rolling. There will be people terminated / blamed / etc. This could potentially cause enough conflict to drive someone to murder. Again, I think it's far fetched but possible.
3. My working theory (subject to change). I believe the perp was known to Jayme based on LE's insistence that she was endangered, not a suspect and believed 100% to be alive. Be it someone she knew or someone her parents knew. I believe the murders took place around the 1230 time frame when the neighbor likely heard the shots. (mostly because I do NOT believe they happened in the 4 minutes it took police to respond ; that four minutes was precious get away time).
The perpetrator and Jayme remained in the house (I hesitate to post speculation on what was happening in this time but they could have been panicked, arguing or the perp could have been assaulting Jayme). Jayme seizes an opportunity and gets ahold of her mothers phone somehow, dialing 911. The perpetrator "catches her" and this is the scuffle heard on the 911 call. I also believe that something was heard by the dispatcher that led them to believe it was a potential suicide as it was originally dispatched. Maybe a threat to Jayme " I'll kill myself!"
The perp takes Jayme and bolts knowing that police are en route. I'm just not sure how they got away. My gut (with little to support it) is that it wasn't by car. There are likely a lot of people that know the land there extremely well. The only supporting "evidence" I have for this gut feeling is LE searching neighbors home. Makes me believe that they may have suspected a "on foot" or alternative (ATV) escape. Someone may have known the perfect place to hide out.