FBI Mobilized After 10 Government Scientists With Classified Nuclear Access Vanish or Turn Up Dead

Something very strange is going on in America right now, and President Trump just made it clear he’s not going to let it slide.

Ten scientists and senior government employees with access to some of the most closely guarded nuclear and aerospace secrets in the country have either vanished or turned up dead since mid-2024. And until this week, almost nobody in Washington was talking about it.

That changed when White House Press Secretary Karoline Leavitt confirmed that the administration has brought in the FBI to holistically review every single case and look for connections between them.

Leavitt posted the announcement directly on X:

In light of the recent and legitimate questions about these troubling cases, and President Trump’s commitment to the truth, the White House is actively working with all relevant agencies and the FBI to holistically review all of the cases together and identify any potential… pic.twitter.com/SJ9thaFegh

— Karoline Leavitt (@PressSec) April 17, 2026

The list of names is chilling. Retired Air Force Major General William “Neil” McCasland disappeared near Albuquerque on February 27, leaving his phone, glasses, and personal devices behind at home. Monica Reza, a group manager at NASA’s Jet Propulsion Laboratory who worked on rocket materials, vanished during a hiking trip in California in June 2025. Caltech astrophysicist Carl Grillmair was shot and k*lled outside his home in February.

Others include Steven Garcia, a government contractor at the Kansas City National Security Campus who has been missing since August 2025, and Anthony Chavez, a Los Alamos National Laboratory employee who vanished in May 2025.

President Trump addressed the situation directly when reporters asked him about the cases, calling it “pretty serious stuff.”

BREAKING: President Trump vows to look into the 10 scientists who have gone missing or turned up dead:

"I hope it's random, but we're going to know in the next week and a half."

"I just left a meeting on that subject."

"Pretty serious stuff… Some of them were very important… pic.twitter.com/VMgeZyayXl

— Fox News (@FoxNews) April 16, 2026

Newsweek reported on the expanding investigation:

The Trump administration confirmed that it was working with the FBI to investigate the mysterious deaths and disappearances of ten U.S. scientists and government employees who had access to nuclear or aerospace material.

White House Press Secretary Karoline Leavitt announced that President Donald Trump has brought the FBI into the investigation, stating that the White House is “actively working with all relevant agencies and the FBI to holistically review all of the cases together and identify any potential commonalities that may exist.”

“No stone will be unturned in this effort,” Leavitt said.

What makes this whole situation even more unsettling is that several of these individuals had overlapping professional connections. McCasland and Reza reportedly worked together on a space materials project. Multiple cases are tied to institutions like NASA’s Jet Propulsion Laboratory and Los Alamos National Laboratory, two of the most sensitive research facilities in the country.

Fox News provided additional details on the scope of the investigation:

Since 2023, ten scientists and senior officials with access to some of America’s most closely guarded nuclear and space secrets have died or disappeared without a trace.

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Former FBI Assistant Director Chris Swecker suggested the cases may point to “modern-day espionage” rather than coincidence, noting that classified matters typically remain confidential during investigations.

Authorities have not established any concrete connection among the cases, but some lawmakers have called for closer scrutiny of the disappearances.

Ten people with classified access. Multiple connected to the same research networks. Some missing. Some dead. And the FBI is now on the case.

President Trump summed it up: “I hope it’s random, but we’re going to know in the next week and a half.”