Matthew James Sullivan, a decorated US Air Force veteran who had agreed to testify before Congress about alleged secret government UFO programmes, died at his home in Falls Church, Virginia, on 12 May 2024 from an accidental drug overdose, according to the local medical examiner. Sullivan, 39, was said by associates to be preparing explosive evidence on so‑called 'legacy' UFO operations when he was found dead.
Sullivan's death came months before a planned congressional hearing in November 2024 examining long‑rumoured crash retrieval efforts and other classified UFO work inside the US government. Interest in alleged whistleblowers has surged since 2023, when former intelligence official David Grusch told lawmakers the United States was in possession of unidentified craft and 'non-human biologics' testimony that jolted UFO discussion from fringe territory into formal oversight hearings.
