I was just reading about this today. I'll post the article in entirety as it's a LE statement:
SHERIFF REPORTS TO COMMISSIONERS 7-13-15
"Sheriff Lynn Bowerman told the Lemhi County Commissioners Monday, July 13, that based on the intense and extensive search conducted near Leadore for two year old Deorr Kunz Jr., it doesnt make sense that the boy was not found.
Bowerman said the trained search dogs found nothing and kept coming back to the camp. Helicopters were used day and night to fly the area and fly over Stone Reservoir which is shallow enough to see to the bottom. He said divers explored the lake while approximately 150 volunteers on foot and on horseback conducted a thorough three mile grid-search of Timber Creek. The possibility of abduction by bear, wolf or mountain lion is not being ruled out although no trace of the boy or his apparel, which included oversized cowboy boots, was found.
The small boy disappeared Friday, July 10, from the Timber Creek Campground at Stone Reservoir. Bowerman said Timber Creek terrain is steep and rugged and is a mix of sagebrush and timber. He said given the proven expertise of the dogs the boy should have been found the first day.
Commissioner Chairman Rick Snyder described the area where the family was camped as being at the lakes outlet which is very steep with very fast moving water flowing through brush and trees and limbs, all of which were pulled apart by searchers. Bowerman said people in wet suits were in the creek searching every hole.
The search has been officially suspended. The sheriff said investigators from Bonneville and Bingham counties have offered assistance in further follow-up investigations into any possible criminal histories of those involved."
http://lemhiweb.com/content/search-recap