Schultheis was a dedicated amateur photographer and archeologist who traveled regularly to pursue his hobbies. In 1955 he traveled to Guatemala, where he was last seen on May 20. On that day he hired an airplane to fly him from
Flores to a landing area in the vicinity of
Tikal, where he intended to take photographs of the nearby ruins. Upon arriving at his destination, he arranged to be picked up three hours later for the return flight. Schultheis was last seen headed into a jungle area that was in the direction of the ruins. With no sign of him at the agreed upon departure time, the plane and crew left. They returned the next day, then the day after that, but still did not find him. Efforts by search parties on the ground and in the air failed to find him. Officials with the American Embassy in Guatemala reported in June 1955 that chances of finding Schultheis by that point, whether alive or dead, were "problematical." His remains were discovered on November 23, 1956, by a local
chicle worker. Two cameras, a pair of rubber-soled shoes, and a bag with personal items were also recovered. ==Schultheis notebook==