Congress probes surge of missing nuclear scientists linked to NASA, SpaceX and Blue Origin

Alarming pattern of missing nuclear scientists sparks congressional inquiry

Almost a dozen researchers linked to nuclear and space defense programs at NASA, SpaceX and Blue Origin have died or vanished since 2022, raising alarms that the missing nuclear scientists may be targets of a coordinated effort. The House Oversight Committee on Monday demanded briefings from the FBI, Energy and Defense departments, and NASA Administrator Jared Isaacman, citing a potential national‑security breach.

Committee chair James Comer warned,

“If the reports are accurate, these deaths and disappearances may represent a grave threat to U.S. national security.”

He added that the odds of coincidence are vanishingly small, and that investigators must piece together any hidden links.

The White House acknowledged the pattern, with press secretary Karoline Leavitt saying the administration is “actively working with all relevant agencies and the FBI to holistically review all of the cases together and identify any potential commonalities.” Reuters later reported the FBI has opened a formal probe, seeking connections to classified work or foreign actors.

Among the victims: JPL materials engineer Monica Reza, who vanished on a 2025 hike; retired Air Force Maj. Gen. William McCasland, missing since February 2026; and Caltech astrophysicist Carl Grillmair, found shot dead in his home. The list also includes two Los Alamos staffers, Anthony Chavez and Melissa Casias, who disappeared in 2025 under identical circumstances.

Both SpaceX and Blue Origin have secured billions in defense contracts—↑ $6 billion for SpaceX and ↑ $2.3 billion for Blue Origin—fueling a commercial space‑defense sector that relies on the very expertise now in jeopardy.

Experts note that the niche field of asteroid deflection and planetary defense comprises only a few hundred specialists, making the ↓ 11 incidents statistically implausible as random events. Former FBI official Chris Swecker likened the pattern to tactics employed by hostile foreign powers to coerce or eliminate scientists.

NASA has issued a statement affirming cooperation with federal agencies but found “nothing indicating a national‑security threat” at this time. The investigation remains open, and congressional leaders have pledged to keep pressure on agencies to deliver answers.