Retired U.S. Army colonel who served as Army liaison to the UAP Task Force. Has not testified under oath before Congress, but has stated publicly in interviews and conference appearances since 2023 that he believes non-human intelligence has interacted with humanity, corroborating David Grusch's claims.
Col. Karl Nell is a retired United States Army officer and aerospace executive who served as the Army's liaison to the UAP Task Force. He is recognized for publicly corroborating claims made by David Grusch regarding hidden UAP retrieval programs, though he has done so through media interviews and conference appearances rather than sworn congressional testimony. Nell's key contribution is his vocal assertion that non-human intelligence has interacted with humanity, lending military credibility to the disclosure movement in the eyes of supporters. He has advocated for a controlled, strategic campaign for global UAP transparency to mitigate ontological shock among the civilian population. His public backing of Grusch's account has influenced press and legislative attention on the subject, though his own claims remain unverified and self-reported.