10 U.S. nuclear scientists are dead or vanished. The FBI is investigating. Trump calls it serious stuff. Here's what no one is saying yet.
Image Credit: Leonardo AI
- At least 10 individuals linked to U.S. nuclear, space, and defense programmes have died or disappeared since 2022.
- The FBI confirmed it is leading a cross-agency investigation alongside the Department of Energy and the Department of War.
- President Trump described the situation as "pretty serious stuff" following a White House meeting on the matter.
- The House Oversight Committee launched a formal investigation and sent letters to the FBI, NASA, the DOE, and the Pentagon.
- National security experts are divided. Some see the fingerprints of a foreign operation. Others point to a workforce of more than 20,000 people and argue that tragedy, spread across four years, does not automatically form a pattern.
One scientist vanished mid-hike on an open mountain trail. A former Air Force general walked out of his house carrying only a revolver and never came back. An MIT physics professor was shot dead outside his own front door by a man who drove up from another state to do it. All of them held classified access to America's most guarded nuclear and space secrets. The FBI now wants answers. Congress has opened a formal probe. The White House called it pretty serious stuff. The answers, for now, remain somewhere between classified and unknown.
Who Are These Scientists, Exactly
These are not fringe researchers. They are physicists, aerospace engineers, astrophysicists, plasma scientists, and retired military commanders who spent careers building the technical foundations of America's nuclear deterrent, space defense architecture, and classified weapons programmes.
Their institutions are ones most Americans know only by reputation: MIT, Los Alamos National Laboratory, NASA's Jet Propulsion Laboratory in Pasadena, the California Institute of Technology, and the Kansas City National Security Campus, which manufactures the non-nuclear components found in almost every active U.S. nuclear warhead.
Since 2022, at least 10 of them have either turned up dead or disappeared entirely. In several cases, no phone was left behind, no note was written, and no clear explanation exists. The cases span five states, four years, and multiple federal agencies, and until recently, almost no one in official Washington addressed them publicly.
The Cases at a Glance
The following is a verified, fact-checked record of every confirmed case that federal agencies and the House Oversight Committee have formally flagged. Every entry comes from official statements, law enforcement records, or reporting by established news organisations.
| Name | Affiliation | Status | Year |
|---|---|---|---|
| Amy Catherine Eskridge | Anti-gravity researcher, Alabama | Died, age 34 | 2022 |
| Michael David Hicks | NASA JPL, asteroid science, DART mission | Died, age 59 | July 2023 |
| Frank Maiwald | NASA JPL Principal Researcher | Died | July 2024 |
| Anthony Chavez | Los Alamos National Laboratory (former) | Missing since May 8, 2025 | 2025 |
| Melissa Casias | Los Alamos National Laboratory (admin) | Missing since June 26, 2025 | 2025 |
| Monica Jacinto Reza | NASA JPL / Aerojet Rocketdyne | Missing since June 22, 2025 | 2025 |
| Steven Garcia | Kansas City National Security Campus (NNSA) | Missing since August 2025 | 2025 |
| Jason Thomas | Novartis, active DOD contracts | Found dead, March 2026 | 2026 |
| Nuno F.G. Loureiro | MIT Plasma Science and Fusion Center | Fatally shot, December 2025 | 2025 |
| Carl Grillmair | Caltech / NASA (Spitzer, Hubble) | Fatally shot, February 2026 | 2026 |
| William Neil McCasland | Retired Air Force Maj. Gen., Air Force Research Lab | Missing since Feb. 27, 2026 | 2026 |
Some cases carry at least partial explanations on record. Nuno Loureiro, the MIT fusion physicist who led the university's Plasma Science and Fusion Center and was a world authority on magnetic reconnection, was shot at his home near Boston in December 2025. The gunman, identified as Claudio Manuel Neves Valente, was a former engineering classmate who also opened fire at Brown University's campus the following day, killing two students. That case has a named suspect and a documented motive of personal jealousy.
Carl Grillmair, the Caltech astrophysicist celebrated for discovering water on a distant exoplanet and for his dark matter research using the Spitzer Space Telescope, was killed on his front porch in February 2026. A 29-year-old suspect named Freddy Snyder was arrested in connection with the shooting and a nearby carjacking. Snyder had previously been arrested for trespassing on Grillmair's property while carrying a rifle, though investigators have not publicly confirmed a motive.
The cases that carry no explanation at all have a different quality. Monica Reza, 60, was the director of NASA JPL's Materials Processing Group and had patented a nickel super-alloy used in both rocket manufacturing and advanced weapons systems. Her research contributed directly to reusable rocket programmes, including New Glenn and Starship. She disappeared during a hike near Mount Waterman in the Angeles National Forest in June 2025. Her companion described watching her smile and wave from 30 feet away, and then she was simply gone. Rescue teams searched for days. No trace has ever been found, according to NewsNation's reporting on the case.
William McCasland, a retired Air Force Major General who once commanded the Air Force Research Laboratory at Wright-Patterson Air Force Base, left his Albuquerque home on February 27, 2026. He took his hiking boots, his wallet, and a .38-caliber revolver. He left his phone, prescription glasses, and every wearable device he owned. The FBI is now directly involved in the search, according to FOX 11 Los Angeles.
Jason Thomas, 46, was an associate director of chemical biology at Novartis who held active Department of Defense research contracts. He disappeared from his home in Wakefield, Massachusetts, on December 12, 2025, and left behind his phone, wallet, and keys. Surveillance footage showed him walking near train tracks shortly after midnight. His body was recovered from Lake Quannapowitt after the ice thawed in March 2026, according to the Boston Globe. Local authorities said no foul play was immediately suspected. His wife, Kristen Bartoli, told Boston 25 News that Thomas had lost both parents in the preceding months and was struggling to cope.
Two Los Alamos employees, Anthony Chavez and Melissa Casias, vanished weeks apart in 2025 under similar circumstances. Both left their cars, keys, wallets, and phones behind before disappearing. Casias's niece, Jazmin McMillen, who reviewed multiple pages of police documents and organised family search parties, told CBS News: "Melissa was an administrative assistant and did not have high-level clearance. I haven't seen any evidence linking her to any of the other cases." Steven Garcia, a property custodian for the National Nuclear Security Administration's Kansas City National Security Campus who held clearance over sensitive nuclear assets, disappeared from Albuquerque in August 2025. Surveillance footage shows him walking away from his home on foot, carrying a handgun and leaving everything else behind.
The FBI Steps In and That Is Not a Routine Move
For months, the pattern circulated mostly through Reddit threads and social media speculation. Then members of Congress began asking formal questions. Then the FBI made it official.
On April 21, 2026, the FBI released a statement confirming that it is leading the effort to determine whether there is a connection between the cases. The bureau is working alongside the Department of Energy, the Department of War, and state and local law enforcement partners across multiple jurisdictions. FBI Director Kash Patel confirmed the investigation personally on Fox News.
The phrase "foreign actors" is not language the FBI inserts into public statements as a formality. It signals where investigative suspicion is already pointing, even before any confirmed link between the cases has been established. Patel added that the bureau plans to consolidate all case files into one place and present findings directly to both the White House and the public, stating it is "of such great public importance."
The National Nuclear Security Administration, the semi-autonomous agency within the Department of Energy that oversees the U.S. nuclear weapons stockpile, issued a parallel statement confirming it is examining reports related to its employees and contractors. Current and former Energy Department officials told CBS News the pattern is eyebrow-raising, which, in federal bureaucratic language, is as close to publicly alarmed as official sources typically get.
The investigation also connects to something the broader defense establishment rarely addresses publicly: the intersection of human scientific expertise and accelerating technology. As the United States pushes to advance capabilities in areas like missile defence and space-based detection, the protection of the people who carry that knowledge becomes an urgent, and underinvested, national security priority. The ongoing debate around nuclear safeguards in a world reshaped by artificial intelligence makes that urgency sharper by the month.
Trump, Congress, and the White House React
President Trump confirmed in April 2026 that the White House had already held an internal meeting specifically on these scientist cases. His public remarks were measured, but the content was significant.
White House Press Secretary Karoline Leavitt followed with a written statement confirming the administration is actively working with all relevant agencies and the FBI to review all cases together and identify any potential commonalities. She added that no stone would be left unturned.
On Capitol Hill, the House Oversight Committee launched a formal investigation, sending letters to the FBI, NASA, the Department of Energy, and the Pentagon. Chairman James Comer stated directly: "Once you see the facts, it would suggest that something sinister could be happening, and it would be a national security concern."
The Pentagon's response stood out. The Department of Defense told the committee it was not independently investigating any missing scientists. NASA issued a statement on X saying it is cooperating with relevant agencies but added that "nothing related to NASA indicates a national security threat at this time." That qualifier carries weight in a sentence like that.
Energy Secretary Chris Wright confirmed on Fox News Sunday that the Department of Energy has a formal internal probe running as part of a coordinated cross-agency investigation. When asked whether anything alarming had surfaced, his response was: "Too early to say about that. We haven't found anything alarming yet." The word "yet" does a lot of work in that sentence.
Could This Be a Foreign Operation Against U.S. Nuclear Scientists
This is the question that makes national security professionals uncomfortable, because the intellectually honest answer is that the possibility cannot be dismissed until the evidence says otherwise, and the evidence is still being gathered.
Representative Eric Burlison of Missouri, a member of the House Oversight Committee, posted on X: "We are in competition with China, Russia, and Iran on nuclear technology, advanced weapons, and space. Meanwhile, our top scientists keep vanishing. This has all the hallmarks of a foreign operation."
Former FBI official Chris Swecker told media outlets that the pattern is consistent with documented intelligence tradecraft used by several foreign powers, describing methods that include targeted abduction, coercion, and the systematic removal of scientists either to extract classified knowledge or to disrupt active research programmes.
What History Shows About Targeted Operations Against Nuclear Researchers
The targeting of nuclear scientists by foreign intelligence services is not theoretical. It is documented history. Between 2010 and 2012, five Iranian nuclear scientists were killed in separate, coordinated attacks widely attributed to Israeli intelligence operations. Majid Shahriari, a senior figure in Iran's nuclear programme, was killed by a magnetic bomb attached to his car in Tehran in November 2010. Mostafa Ahmadi Roshan, a director at the Natanz uranium enrichment facility, died by an identical method in January 2012. The operations were precise, sequential, and aimed at a specific stratum of scientific expertise with the clear objective of disrupting national nuclear capability. These were not random tragedies. They were a documented campaign.
The parallel some U.S. lawmakers now draw is this: if adversarial nations have conducted targeted operations against rival nuclear programmes before, the strategic logic of applying that approach to American scientists is not without precedent. Scott Roecker, vice president for nuclear materials security at the Nuclear Threat Initiative, told CBS News that the current U.S.-Iran tensions may also factor into public thinking, specifically because Iranian scientists were the targets of known assassination campaigns, and the memory of that precedent shapes how people read the current pattern.
Adding another dimension: three of the scientists whose cases are now under investigation had documented ties to Blue Origin or SpaceX research programmes. Fortune reported that Blue Origin unveiled its NEO Hunter planetary defence concept in March 2026, developed in partnership with JPL and Caltech, with ion-beam deflection capabilities that share core technology with missile-defence interception systems. Space Force awarded SpaceX nearly 6 billion dollars and Blue Origin approximately 2.3 billion dollars in national security launch contracts in April 2025. The commercial space-defence boundary is no longer a clear line, and the scientists who understand both sides of it are a very small group. As we explored in our coverage of why technology leaders are privately alarmed about the trajectory of AGI, the convergence of machine learning with weapons-relevant scientific knowledge creates national security exposure that did not exist a decade ago.
The Case for Coincidence: Why Some Experts Are Urging Caution
Not every expert sees a pattern, and their arguments carry genuine weight that deserves serious consideration rather than dismissal.
Joseph Rodgers, deputy director of the Project on Nuclear Issues at the Center for Strategic and International Studies, told CBS News: "The deaths and missing persons cases are scattered across several years at different and only loosely affiliated organisations. If all of the scientists were working on one project or weapons system, then I would be more suspicious."
Scott Roecker of the Nuclear Threat Initiative raised a harder statistical reality. The facilities connected to these cases employ more than 20,000 people combined, many of them in administrative and support roles without access to classified information. Melissa Casias, for example, worked as an administrative assistant at Los Alamos. Her niece confirmed she did not hold high-level clearance. In any population of that size, across four years, deaths and disappearances will occur. Some will involve unusual circumstances. Very few will share a common cause.
Former FBI Supervisory Special Agent Jennifer Coffindaffer reviewed the individual cases and told NewsNation that each had what she described as pragmatic explanations. She noted that in at least two instances, individuals left home carrying firearms under circumstances that, when examined independently, suggest personal crisis rather than an external threat. The Thomas family confirmed he had been struggling with grief after losing both parents in quick succession. Local investigators in several of the cases have pointed to personal mental health factors as more likely explanations than foreign interference.
In at least two cases, families of the deceased have publicly asked for the speculation to stop. One family told CNN their loved one had known medical issues and that the sustained online theorising has left them in distress that compounds an already profound loss.
The distinction that matters here is between genuine pattern recognition and confirmation bias. Ten tragedies distributed across four years and multiple unconnected institutions may be exactly that: ten separate tragedies, each with its own cause and its own context. The value of the FBI's formal investigation is that it applies systematic, evidence-based analysis rather than social media momentum to that question.
Where the Investigation Stands Right Now
The FBI has committed publicly to pulling every case into a single centralised review and presenting findings to both the White House and the public. Director Patel confirmed this explicitly: the bureau will "produce that information to the White House and the world because it is of such great public importance." That level of public accountability from an FBI director is not standard. It reflects both the genuine uncertainty surrounding these cases and the scale of pressure from Congress and the public.
The House Oversight Committee is demanding formal briefings from all four major agencies and has established deadlines for responses. Whether those briefings translate into public disclosure is a separate matter, given the classified nature of much of what these scientists spent their careers working on.
For the families of those still missing, the federal involvement at least brings the possibility of answers. For colleagues who work in the same small, specialised fields, it raises a more personal question: whether existing security protocols adequately protect people who carry classified knowledge not on a server but inside their own minds.
This investigation also surfaces something the broader defence establishment has been slow to address publicly. Encryption and physical facility security can protect data. They cannot protect the knowledge that lives inside a person. As the United States continues its push to modernise its defence industrial base, protecting the scientists who make that base function deserves investment equal to the hardware they design.
As of April 23, 2026, no official link between any of these 10 cases has been confirmed. The FBI investigation is active. Congress is formally engaged. The White House is watching. If a connection does emerge, whether it points toward a foreign operation, a domestic failure, or a cause the public has not yet considered, this story grows considerably larger than it already is. Until then, the most accurate summary of where things stand is also the most uncomfortable one: the relevant authorities do not know, and that uncertainty is precisely what makes this worth following.
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