House Oversight Committee to Investigate Missing, Dead U.S. Nuclear Scientists

The House Oversight Committee, chaired by Rep. James Comer (R-Ky.), has announced an investigation into the deaths and disappearances of U.S. scientists associated with nuclear and space research programs. This decision follows reports of at least 10 scientists who have died or gone missing since 2023 ^[1][2].

Comer stated that he has sent letters to the Department of Defense, FBI, Department of Energy, and NASA seeking information on these cases. He plans to bring agency leaders before Congress to discuss the matter ^[1][2].

White House Press Secretary Karoline Leavitt emphasized the administration’s commitment to thoroughly reviewing the cases, stating that “no stone will be unturned” in the investigation. The White House is collaborating with federal agencies to examine the circumstances surrounding these incidents ^[2][3].

Rep. Eric Burlison (R-Mo.), a member of the House Oversight Committee, expressed concern over the pattern of deaths and disappearances, describing it as “too coincidental.” He has called for a federal investigation to determine any potential connections ^[3][4].

The list of affected individuals includes Steven Garcia, a government contractor who disappeared in August 2025, and William “Neil” McCasland, a retired Air Force Major General missing since February 2026. Other cases involve Anthony Chavez, Melissa Casias, and Monica Jacinto Reza, all of whom have been reported missing since 2025 ^[5][6].

Among those who have died are Nuno Loureiro, director of MIT’s Plasma Science and Fusion Center, who was shot in December 2025, and Carl Grillmair, a Caltech astrophysicist, who was killed in February 2026 ^[6][7]. Michael David Hicks, a NASA Jet Propulsion Laboratory research scientist, died in July 2023 ^[7][8].

While the White House has confirmed it is reviewing these cases, no federal agency has yet confirmed any connection between them or that a coordinated investigation is underway ^[8][2].

What Is Known

The House Oversight Committee is actively investigating the deaths and disappearances of scientists linked to critical U.S. programs. Letters have been sent to key federal agencies for information, and the White House has pledged full cooperation in reviewing the cases ^[1][2][3].

What Remains Unclear

It remains unconfirmed whether the incidents are connected or part of a coordinated pattern. No federal agency has provided evidence of a link, and the possibility of foreign involvement, as suggested by some lawmakers, has not been substantiated ^[8][3].