Hi, newbie here - grew up in a different part of rural Iowa and got interested in this news.
My understanding is that he had multiple loads and was expected back to load another load after dropping off the first one - that would account for it being a several hours long job. I don't have first-hand experience with loading pigs but is it plausible he left his coveralls at the loading site since he knew he was coming back for another load?
7:30p left home
Did he have to go pick up the livestock trailer somewhere first? It was a Brown labeled trailer, is there a Brown trucking near by or somewhere that has "Brown" labeled livestock trailers?
9:00p earliest arrival at loading point
Who knows how long he had to wait to load, if there were other trucks or delays, or how long it took.
10:00-11:00 leave with first load?
90 min drive back -> 11:30-12:30 - goes missing. They've said the last communication was early morning so maybe he was nearby and sent a text at this point, close to when he disappeared. I have a bad feeling it was some kind of 'goodbye' but they don't want to say that
As for the timeline - assuming everything went normal, the rest of the night might have gone like:
30-60 min unload puts you between 12:00 - 1:30
Drive back to EG - 1:30 - 3:00, and then another load and drive is another 2 to 3 hours maybe
Let's say 5a or 6a for 2nd drop off + time to unload.
If he had to return the empty trailer to the loading site, that's another 3 hours to get back home by 9a, but it sounds like with only 2 trips, it's plausible that he would be gone all night and this was normal for his wife to expect.
I haven't been able to find anywhere the actual drop-off or load site and there are hundreds of pig farms. When they say pick up "in" Eagle Grove and drop off "in" Sac City, I highly doubt it was in the actual towns - the farms would probably be within 5 or even 10 miles of the town and that's still how you'd refer to it out there. So the fact that his truck was found a few miles north of 20 isn't a big concern IMHO, he could have been heading from 20 to any of the farms in that area.
The fact that his truck was in the road also is kind of strange but where else would it be? On rural Iowa roads, there's maybe a foot or two of shoulder, which might be gravel. Depending on the condition, that might not be something you'd want to drop your wheels onto, and would it be worth it if it's only going to get you a foot or two anyway when you're mostly in the lane?
If he was in good mental and physical condition when he left his truck, at night at that intersection he likely could have seen yard lights from a farm in each direction that would have been less than a mile away, if he needed help for some reason.