David Grusch
Notes
David Grusch (born 1987), former United States Air Force intelligence officer who told a congressional hearing in July 2023 that the government held recovered "non-human" craft and "biologics" and had reverse-engineered them for decades. He also testified that he had not seen any of it himself and was reporting what others had told him. The Pentagon's 2024 historical review of the claims found no evidence for them and traced several to misunderstood conventional programmes. He appears in UFOs and UAP as the best-credentialled example of hearsay under oath.
Wikipedia: https://en.wikipedia.org/wiki/David_Grusch