The Hidden World

We do not know why the tracking dogs never tracked Joe's scent on the second day after he went missing having sniffed scent articles which were Joe's. If Joe ran to the top of the canyon, his scent should have been easy to track. We do not know why the infrared heat seeking plane (which could spot anything including clothing apparently) did not spot Joe's red shorts. We also do not know why nothing was seen by the helicopter we hired or by the small plane which volunteered and searched the area and the cliffs day after day in the beginning.

https://www.facebook.com/FindJoeKeller/ ... &source=11

Running in the forest can be a dangerous enterprise because it makes you look like prey. Seems odd though that it took a year to find his remains.