Donner Summit Boy

The Haunting by the Donner Party in Truckee, California:
      

 Dozens of pioneers perished when they became snowbound in the Sierra Nevada mountain range in the late 1840s.  The nation was shocked when some of the starving people resorted to cannibalism.  Some historians have accused one survivor of murdering children so he could live on their flesh.

Jason Sweeton, a clinical researcher for the FDA, was not looking for ghosts when he snapped the photo below on the site where Donner campers starved to death. 
He was shocked to discover the face of the child in the bottom right hand corner of the photograph.  Jason had been alone on the trail.  Where had the mysterious little boy come from?
Jason was, perhaps, more shocked when he was told that one small boy in that fateful campground did not die of natural causes.