After 8 months of sitting on the fence, I now think number 4 is the most likely. I think the adults were careless, possibly because they had been drinking, when they got to the campground after dark on Thursday evening. In my mind it was probably 9:00 to 10:00 pm. Some kind of accident happened, like somebody backed over little DeOrr or he got hit in the head with a shovel or fire log, while they were getting things set up for the night. Most likely a head injury. (Could also be that somebody lost their temper and either shook him or hit him over the head with something.) They knew he was hurt, but didn't think it was that bad and put him to sleep for the night. When they woke up in the morning, they found him unresponsive. That's when the story breaks down and the lies begin, from that point on is all a cover-up. Why they would lie and cover up an accident is the part I can't understand.