Paul went missing in Joshua Tree National Park (California) on July 13th, 2018 day hiking the 49 Palms Oasis Trail. Since his disappearance, an extensive search of the area, including 6,000 man hours, multiple K-9 units, and advanced areal imaging systems have turned up no clues of his whereabouts.

William Ewasko of Marietta, Georgia was last seen on June 24, 2010 in the Joshua Tree National Park area. He planned to hike alone in the Joshua Tree National Park and was considered an experienced hiker and had hiked the area several times before.