Truettner

Lt. Col. (later Col.) Gordon I. Truettner was a U.S. Air Force officer involved in early military UFO investigations during Project Sign and Project Grudge (1947-1949). Alongside Lt. Col. Paul Deyarmond, he analyzed key sightings like the 1948 Chiles-Whitted case, grappling with unexplained phenomena amid shifting Air Force attitudes from extraterrestrial hypotheses to skepticism. Truettner contributed to efforts questioning pilot testimonies and project conclusions, as documented in declassified reports. No birth/death dates or personal publications are known; his role highlights internal debates in Project Grudge's technical reviews.