White House Launches Probe Into Mysterious Deaths, Disappearances of 10 US Scientists

President Trump says administration is investigating 'pretty serious stuff' involving researchers with access to classified information.

Apr. 16, 2026 at 10:20pm

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A dynamic, abstract painting of laboratory equipment and tools in motion, with overlapping geometric shapes and waves of deep blue, green, and gray colors, conveying a sense of mystery and unease around the recent loss of prominent government scientists.The White House investigates a string of unexplained deaths and disappearances among US scientists with access to classified information.Kirtland Today

President Donald Trump announced on Thursday that the White House has launched an investigation into the recent deaths and disappearances of 10 US scientists, some of whom held high-level security clearances and worked on sensitive government projects. Trump said the administration is looking into the 'pretty serious stuff' over the next week and a half.

Why it matters

The unexplained deaths and disappearances of these scientists, many of whom had access to classified information related to aerospace, nuclear technology, and other sensitive government work, have raised national security concerns and prompted the White House to intervene.

The details

According to reports, the 10 scientists who have gone missing or been found dead in recent months include Neil McCasland, an Air Force research leader; Monica Jacinto Reza, a NASA aerospace engineer; Steven Garcia, a government contractor tied to the nuclear weapons program; and several other researchers and engineers working on major government-backed projects.

  • On February 27, 2026, Neil McCasland disappeared.
  • On June 22, 2025, Monica Jacinto Reza went missing while hiking.
  • On August 28, 2025, Steven Garcia was last seen at his home.
  • On February 16, 2026, Carl Grillmair was shot and killed outside his home.
  • On December 15, 2025, Nuno Loureiro was shot at his home.

The players

Donald Trump

The President of the United States who announced the White House investigation into the deaths and disappearances of the 10 scientists.

Neil McCasland

A senior official who held leadership positions at the Air Force Research Laboratory and the National Reconnaissance Office, and commanded research facilities in New Mexico and Ohio.

Monica Jacinto Reza

An aerospace engineer who was the co-creator of a heat-resistant alloy and the Director of Materials Processing at NASA's Jet Propulsion Laboratory.

Steven Garcia

A government contractor tied to the Kansas City National Security Campus, which produces non-nuclear components for the US nuclear weapons arsenal.

Carl Grillmair

A NASA scientist who worked on major space telescope missions like Hubble and Spitzer, contributing to research on galactic structure, dark matter, and exoplanets.

Nuno Loureiro

A leading figure in fusion energy research, studying plasma physics and technologies for harnessing clean, limitless energy.

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What they’re saying

“There are these 10 missing scientists with access to classified stuff, nuclear material, aerospace. They've all gone missing or turned up dead in the last couple months.”

— Reporter

“Well, 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.”

— Donald Trump, President of the United States

“So pretty serious stuff, but we're going to be now hopefully, I don't know, coincidence if you want it, whatever you want to call it. But some of them were very important people and we're going to look at it.”

— Donald Trump, President of the United States

What’s next

The White House has said it will provide an update on the investigation into the scientists' deaths and disappearances within the next week and a half.

The takeaway

The unexplained loss of these high-profile scientists with access to sensitive government information has raised national security concerns, prompting the White House to launch a probe to determine if foul play was involved or if the incidents were simply coincidental.