This is what I find so frustrating, the phrase we keep hearing "He just disappeared". No, he did not just disappear. All we are being told is that the parents left him with Great-Grandpa, Great-Grandpa either did not know he had him, or, as said by JM's mom, he turned his head and "he disappeared". Now GG's friend also says "he disappeared". Not one single person, that I have read anywhere, has said specifically what this child was doing when last seen. We hear it was near naptime, but we never hear what he was actually doing. If JM and DK walked away, they should say, "he was standing right next to GG, holding his hand" or playing in the dirt, something specific that places him in an exact spot. The GG or his friend should place him in an exact spot doing a specific activity when they last had their eyes on him. For me, when I picture the scenario, I can almost place everyone there but the child because he supposedly was there and then "poof".
Remember the Garrett Bardsley case? He was a 12 Yr old boyscout camping in Utah with his dad and his troup? He was lost and has never been found. But we know what he was doing. He was fishing with his dad, he got his feet wet and went back to the camp to get new socks. He went alone. He missed the trail so his dad got him back on track. The dad tells the distance, everyone finds it hard to believe he did not make it. They all began searching very quickly and called in help. But somehow he was lost. But he can be placed there easily by many. We can see him there.