First time comment
Logically speaking:
The perpetrator most likely knew the family. Basic homicide fact & standalone kidnappers or traffickers normally don't want attention. Trafficking also normally happens to people who are in vulnerable situations where the family doesn't protect them.
Wanted to harm both of the parents: if just the father then why would he proceed after killing him. If just the mother then why would he wait till the father was home after a late shift. In towns of this size, similar to that of my extended family, people know everyone's schedules.
Jayme was probably a target of a sinister motive.
The house being positioned right off the highway makes it very unlikely that anyone would be able to case it without drawing suspicion without knowing them. Especially so if they are reclusive.
The front door being the entrance lends to it being personal. Vs. the glass door in the rear?
I can't recall another case where someone kidnaps without that being one of the main objectives.
The length of time the perp took in the home, without taking anything makes it seem as though it was a place where they felt comfortable.
The perp most likely left in a car, considering the officer's response time. Also weighing the idea of walking in a rural area to murder and kidnap is far fetched. I also think there would be more physical evidence if she was able to run.
If reports that she was on her own phone at the party earlier in the day are true and it isn't in the house, then it seems likely that the perp grabbed it, turned it off and took it with him to conceal fingerprints.
Also seems like this person would be able to get off the road quickly, whether at a home or hotel.
This all being said, one fact comes out and all of this could change.