Hans Peter Langer, 79, vanished from his Pahrump, Nevada home on June 20, 2011. In the weeks before he disappeared he had talked with his adult children about wanting to hike in the mountains surrounding Pahrump Valley, and that interest became a focal point for searches after he was last seen at home.

Search and rescue teams and the Nye County Sheriff’s Office conducted extensive searches of the rugged terrain but found no sign of Langer and received no communication from him. The investigation eventually grew cold. A judge later declared him deceased in the absence of a body, though no remains were recovered.

Anyone who knew where Hans liked to hike, or who may have seen him in the Pahrump area around June 20, 2011, is asked to come forward with information.