I love some of your imagination, but in all reality, dude has probably been laying in that field since he went missing. I'm no farmer but I know tractors have been in every field around me this week so I would assume it's true of where they found him as well. Is there a chance someone abducted him, killed him, dumped him? Sure. I'm guessing fella was either high, drunk, or mentally unstable, got out of the truck and started walking. Made it 1.5 miles sat down or laid down from being tired and cold and just froze to death.