I enjoy pattern recognition, so here's my list of speculations. I'm a new and very zealous websleuth, so bear with me if I babble!
1.)OK. His older brother got in trouble for sex with a minor, but his FB showed him in a relationship with a same girl (same or different from charges, who knows?) for several years. Her FB showed about the same. Her FB also showed she was currently in WI...and still with the guy. So is he in WI, too? Could JP have been influenced by the having a relationship with a younger girl thing? Older brother has a drug charge somewhere, too. Could this be how the boys "supported" themselves? When police initially confirmed/recovered Jayme, they said they expected possible further suspects. Oh yeah? Brother one of them for a hot minute?
2.) JP didn't make the cut for the Marines. One of my boys is a Marine and you know, I am so proud he made it through! The basic training/Crucible is brutal! I didn't know my boy was that tough! So for JP to have been unsuccessful...what happened? And his mother posted he was "leaving soon" but no updates after...or none I could see. Hmmm...moms on social media are usually...loud and proud about stuff like that. In my experience, moms that enjoy hunting, (including bowhunting, yo), guns, wilderness, etc. are usually really vocal about the armed forces. What has JP been up to for the past 3 years? And if the theories about him being a "gamer" are true...yo. He'd have a social media presence SOMEWHERE. Gamers aren't gamers unless they get online to talk **** to one another while gaming! It's 1/2 the battle!
3.) I read that the cabin was transferred to a local credit union by the father 8 days before the kidnapping. Was there a "**** or get off the pot come to Jesus get a job" trigger? The parents have been divorced for some time...was dad tired of supporting his troubled sons? Whatever their economics, the family had enough $$ to keep a cabin - with utilities (at least lights & firewood), but their boys weren't in college or really doing anything with life...soooo...I'm not finding many interwebs fingerprints on the father either.
4.) People (teachers, friends from school, etc.) have described JP as a smart, quiet loner. OK. Neighbors said they weren't even fully aware that he was staying at the cabin but also that their family was known to be there year round. Grandma died in May. Was she there year-round? Was she "supporting" JP? The cabin ain't fancy, but the pics I saw show it to be relatively neat - esp. with a 21 yr old staying there for at least 3 months. Not all 21 yr olds are slobs, but most are. Best guess? Grandma lived there, dies, dad has to let go of cabin, JP has until end of year to hang out one last time - with a "girlfriend"? Maybe if he had a girlfriend to "take care of" dad would be more receptive to continued support? Maybe the kid was going to lose everything - no family to rely on, no job, nowhere to stay - and just decided to do something twisted before going out with a bang. Don't tell me 21 yr old males don't come up with these ideas...there's been too many in the news lately.
Just thoughts - too early in the morning & color me obsessed - over coffee & chainsmoking - while I hunt & devour clues! Feel free to point out any errors or offer answers on these burning questions!