Joseph S. Domin, 68, known among Arizona hikers as GPS Joe for his careful trail documentation, disappeared after a solo outing in the Mazatzal Wilderness. He was last seen November 8, 2010, after setting out alone to find an off-trail route to the summit of Sheep Mountain. His white 2005 Toyota 4Runner was found at the Mount Peeley trailhead. Official search operations began the evening of November 15 and, after five days of aerial and mountaineering team work on steep, densely vegetated terrain, were called off with no clothing or gear recovered.

Community volunteers kept looking in subsequent years. In December 2012 Superstition Search and Rescue resumed efforts, using a quadcopter; an aerial image showed a large X of branches and searchers later reported finding what was believed to be his pants and a piece of equipment. Joseph Domin has not been located. If anyone hiked Sheep Mountain or the Mount Peeley area around early November 2010, did they see anything that could help explain where he went?