Emmett Trapp ended up 1 mile from home. He actually walked 3-4 miles, through washes, over hills... then circling back into view of homes, to end up a mile away.
Arizona Toddler Emmett Trapp Wandered for Miles Trying to Find Home
Shoeless Boy Wandered Up to 4 Miles Trying to Get Back Home
http://abcnews.go.com/US/TheLaw/emmett-trapp-wandered-off/story?id=11323106
I will always believe, that had volunteers been allowed to search he certainly would have been found in time. There would have been more than enough people to cover the area he was in.
I'm not familiar with Emmett's case, but from other cases I've followed, I, who have no experience in SAR can see their search parameters can, in some cases, be not good enough. They need to expand them. I don't know where they get the information/statistics with which they create these parameters, but in many cases, they just don't work - not far enough. For some reason I believe that child is lying in a field further out than they searched. I could be wrong, God knows, but given the Tanya Shannon case, found OUTSIDE search area, and the little girl found waist deep in a swamp by a fellow church member again, OUTSIDE the parameters. I can't remember her name, there are so many missing.
The point being, SAR needs to UPDATE their search parameters. I'm not sure what Sarx means by a circle, but my circle would be 2 1/2 miles out, stick a protractor in the missing point and go around 2 1/2 miles, THEN work INWARD and OUTWARD at the same time. Do NOT send volunteer searchers home, put them to work.
My opinion only