I just have to throw this out there. Whatever has happened has nothing to do with farming or his farming life.
This is about relationships good or bad or soured.
I believe something bad has happened here and we will know soon.
MOO
I agree it had nothing to do directly with his work, but a few questions/statements that just popped in my head:
A grain truck would mean like a semi (semi-tractor/semi-trailer/etc), right? I live in central IL so people haul grain and sand all day long. It wouldn't be a personal vehicle you'd take to town for groceries. Usually the farmers have a personal vehicle to run to the fields in, drive barn to barn, get to/from the trucking company they worked for, etc. Being a family farm, there could be just one personal vehicle that everyone shares. Example: My old local neighbor would leave his grain truck in the field over night ... so his personal vehicle was often parked in a field as well. On certain days his wife would drop him off at the grain truck in the field and pick him up later, because they shared a vehicle.
I'd like to know if he drove that grain truck to his last know location or was he dropped off. Also, did he leave it parked outside of his trailer when he was done for the day, back at a company, in the field, etc?
There could be bad blood BECAUSE of the business as well, people get angry over seemingly small things when it has to do with property, but I feel like this was more personal (with really no reasoning to go off of, just my "gut" at this time).
I'm hoping he didn't get hurt, wander down the road, rip off his boots, and kept wandering. If that were the case, I would think he would have been found by now, but we all know that isn't always the case unfortunately.
Also, it was stated that he wasn't the partying type - IMO it doesn't mean he didn't hang out with people after work. JMO MOO
Sorry for the long rambling, but all these little tidbits have been stuck in my head.