House Oversight Chair Probes 11 Missing Or Dead U.S. Scientists In Sensitive Research Roles
House Oversight Chair James Comer is probing 11 missing or dead U.S. scientists who worked in sensitive research roles, asking federal agencies for information. Comer sent formal letters to the Department of Defense, the FBI, NASA and the Department of Energy seeking records and briefings on the cases. The list grew to 11 after media outlets identified Amy Eskridge, a Huntsville propulsion researcher who died by a reported self-inflicted gunshot in June 2022. Named individuals include retired Maj. Gen. William Neil McCasland, NASA scientists, Los Alamos employees and industry researchers, some of whom vanished from homes or died in unclear circumstances.
The White House says it is reviewing all identified cases with "all relevant agencies and the FBI" and pledged that "no stone will be unturned." President Trump said he had "just left a meeting" on the matter, called it "pretty serious" and predicted answers within about a week and a half. The FBI says it is aware and providing assistance to local probes, but CBS and others report it is not leading a unified national pattern investigation. The Department of Energy's National Nuclear Security Administration acknowledged being aware of reports about employees at its labs, plants and sites and said it is looking into the matter.
Social media and some lawmakers amplified concerns, with analysts and users noting a possible pattern across defense-related roles and flagging McCasland's ties to Special Access Programs. Representatives Eric Burlison and Tim Burchett urged further probes and transparency, while other voices cautioned against jumping to conspiracy theories. Early coverage, especially by Fox News, emphasized a worst-case pattern and named specific cases as possibly linked, which pushed national attention and prompted Comer's letters. Later reporting, including pieces from CBS, injected skepticism, noting no clear evidence that the incidents are connected and that many lab workers do not hold sensitive roles, reframing the story as an open inquiry into coincidence, mental health, crime and any real ties to classified work.
National Security and Intelligence
Scientific Community and Defense Research
U.S. Defense Research and Science
U.S. Defense Scientists Deaths and Disappearances
Trump Administration
This story is compiled from 8 sources using AI-assisted curation and analysis. Original reporting is attributed below. Learn about our methodology.
📌 Key Facts
- House Oversight Committee Chairman James Comer has sent formal letters to the Department of Defense, FBI, NASA and Department of Energy demanding information on 11 specific scientist deaths and disappearances and warned “something sinister” may be behind them, saying he will bring agency leaders before Congress after they respond.
- Reporting consolidated the cluster to 11 cases since 2022, naming researchers tied to nuclear, space and related programs — including retired Maj. Gen. William Neil McCasland; Los Alamos-linked employees Anthony Chavez and Melissa Casias; Kansas City National Security Campus worker Steven Garcia; aerospace engineer Monica Jacinto Reza; pharmaceutical scientist Jason Thomas; former JPL/NASA scientists Michael David Hicks and Frank Maiwald; and others such as Carl Grillmair and Nuno Loureiro.
- The most recent addition is Amy Eskridge, a Huntsville-based experimental propulsion researcher who died by a reported self-inflicted gunshot on June 11, 2022; Eskridge co-founded the Institute for Exotic Science, publicly claimed an ‘antigravity’ breakthrough in 2020 and said she experienced escalating harassment, threats and sabotage.
- Officials and agencies are responding: White House Press Secretary Karoline Leavitt said the administration is reviewing all identified cases with “all relevant agencies and the FBI” and vowed “no stone will be unturned,” and President Trump said he had just left a briefing, called the situation “pretty serious” and expected answers within about a week and a half.
- The Department of Energy’s National Nuclear Security Administration (NNSA) acknowledged it is aware of reports related to employees at its labs, plants and sites and said it is “looking into the matter.”
- Law enforcement posture: CBS reported the FBI is not currently leading a single, unified pattern investigation but is “aware and providing all assistance requested” as local investigations proceed; Rep. Eric Burlison said his office referred the Matthew Sullivan case to the OIG and FBI and that the FBI deemed the referral “credible and urgent,” and he has urged broader agency involvement.
- Media accounts describe a range of circumstances — confirmed homicides (e.g., Caltech scientist Carl Grillmair was shot Feb. 16, 2026, and a suspect has been charged), suicides, unexplained deaths, and disappearances in which individuals reportedly walked out of their homes or left personal items behind (for example, McCasland reportedly left phone, keys and glasses) — while causes remain undisclosed for some cases.
- Experts and commentators are divided: some high-profile voices (e.g., Dr. Michio Kaku) call the number of deaths and disappearances “unheard of,” while other energy-security and former DOE officials say there is no clear evidence the cases are linked and caution against conspiratorial social-media theories; suggestions that individuals were targeted for their knowledge or forced into hiding remain speculative and unconfirmed.
📰 Source Timeline (8)
Follow how coverage of this story developed over time
April 19, 2026
3:19 PM
Comer warns ‘something sinister’ may be behind deaths, disappearances of 11 nuclear, space-linked scientists
New information:
- House Oversight Committee Chairman James Comer has sent formal letters to the Department of War (Pentagon/DoD), FBI, NASA, and Department of Energy demanding information on 11 specific scientist deaths and disappearances.
- Comer publicly warned on Fox & Friends Weekend that 'something sinister could be happening' and said he plans to bring agency leaders before Congress after they review his inquiries.
- The article names all 11 individuals in the cluster, including their roles and affiliations, tying several directly to NASA, Los Alamos and other sensitive programs.
- President Donald Trump said he 'just left a meeting on that subject,' called the situation 'pretty serious,' and said he expects to know within about 'a week and a half' whether the pattern is random.
- The National Nuclear Security Administration confirmed it is 'looking into the matter' in response to renewed attention.
12:00 PM
String of scientist deaths, vanishings fuels expert talks of shadow ops and silenced secrets: 'Very serious'
New information:
- Fox identifies at least 11 specific individuals who have died or vanished since 2022, most tied to nuclear science, space research, or related work, and names several with photos and role details.
- New case specifics include the February 16, 2026 shooting death of Caltech scientist Carl Grillmair outside his home, with 29-year-old Freddy Snyder charged with his murder.
- Details on other cases include the December 2025 shooting of Nuno Loureiro at his Massachusetts home tied to a Brown University mass shooting, and the later discovery of Novartis scientist Jason Thomas's body in Lake Quannapowitt after he went missing.
- The article reiterates that causes of death for some, including former JPL scientist Michael David Hicks and NASA JPL scientist Frank Maiwald, remain publicly undisclosed.
- It restates that aerospace engineer Monica Reza, Kansas City National Security Campus worker Steven Garcia, retired Air Force Gen. William Neil McCasland, and others remain missing under what are described as suspicious circumstances.
- An expert quoted by Fox raises the possibility that some of the scientists could have been targeted for their knowledge or forced to disappear for their own protection, although this is presented as speculation rather than confirmed fact.
April 18, 2026
11:00 AM
Renowned physicist alarmed by 'unheard of' number of scientists dying or vanishing now on White House's radar
New information:
- Identifies Dr. Michio Kaku as a prominent physicist publicly warning that at least 10 scientists with advanced security clearances have died or vanished, calling the pattern 'unheard of.'
- Provides concrete case details for several incidents, including the Feb. 27 disappearance of retired Maj. Gen. William Neil McCasland from his New Mexico home, leaving phone, keys and glasses but taking a handgun and boots.
- Names two additional missing former Los Alamos National Laboratory employees, Anthony Chavez and Melissa Casias, including dates and circumstances of their disappearances and their ties to the lab.
- Quotes NNSA acknowledging that it is aware of reports related to employees of its labs, plants and sites and is 'looking into the matter.'
- Quotes White House Press Secretary Karoline Leavitt confirming that the administration and FBI are 'actively reviewing all cases' to look for potential commonalities.
April 17, 2026
9:19 PM
What we know about deaths, disappearances of staff at government labs
New information:
- President Trump told reporters he had 'just left a meeting' on the disappearances and deaths and called it 'pretty serious stuff,' while adding he hopes it is a coincidence.
- CBS reports the FBI is not currently leading a unified pattern investigation but is 'aware and providing all assistance requested' as local cases proceed.
- The Department of Energy's National Nuclear Security Administration issued a statement saying it is 'aware of reports related to employees of our labs, plants, and sites and is looking into the matter.'
- Retired Maj. Gen. William Neil McCasland, 68, former commander of the Air Force Research Laboratory, has been missing from the Albuquerque area since late February and is one of four current or former employees at sensitive sites who have gone missing in New Mexico over roughly the last year.
- A former Department of Energy official told CBS there is no evidence the cases are linked and emphasized that many lab employees hold mundane, non-sensitive jobs despite 'sketchy sounding' titles.
- Multiple energy security and law enforcement experts interviewed by CBS said they see no obvious link between the individual cases and viewed social-media theories as conspiratorial.
7:02 PM
White House reviewing cases of missing, dead scientists for possible links as 11th person identified
New information:
- White House Press Secretary Karoline Leavitt says the Trump administration is working with "all relevant agencies and the FBI" to review all identified cases together for possible links.
- Leavitt issued a written statement on X promising that "no stone will be unturned" and that the White House will provide updates.
- President Trump said he had "just left a meeting" on the cases, called the situation "pretty serious," and predicted answers within about a week and a half.
- Fox News reports the list of cases has grown to 11 with the addition of Huntsville-based researcher Amy Eskridge, who died in 2022 at age 34.
- The Department of Energy's National Nuclear Security Administration acknowledged awareness of reports involving employees at its labs, plants and sites and said it is "looking into the matter."
5:40 PM
Rep Burlison demands FBI probe after top US scientists vanish or turn up dead
New information:
- House Oversight Committee member Rep. Eric Burlison has publicly called for the FBI and 'every agency' to investigate the cluster of scientists' deaths and disappearances.
- Burlison says his office referred the case of Matthew Sullivan, who died by suicide under what he calls suspicious circumstances, to the Office of Inspector General and the FBI, and that the FBI deemed the referral 'credible and urgent.'
- The piece recounts that McCasland's wife publicly posted on Facebook that he retired years ago and that it is 'quite unlikely that he was taken to extract very dated secrets from him,' injecting skepticism about espionage motives.
- The Fox hit reinforces that at least 10 U.S. researchers with access to top-level secrets have gone missing or turned up dead since 2023, and highlights that several (including Monica Jacinto Reza, Anthony Chavez, Melissa Casias, Steven Garcia, and McCasland) reportedly walked out of their homes before vanishing.
- President Trump is quoted saying he has just left a briefing on the cases, hopes they are 'coincidence,' and will know more soon, but he does not say whether he believes the cases are connected.
3:37 PM
11th scientist death emerges in string of missing, dead officials with access to US secrets
New information:
- Amy Eskridge, a Huntsville-based experimental propulsion researcher who died by reported self-inflicted gunshot on June 11, 2022, is now being cited as the 11th case in the cluster.
- Eskridge co-founded the Institute for Exotic Science and publicly claimed in 2020 that she and colleagues had discovered 'antigravity,' after which she described escalating harassment, threats and sabotage.
- She warned in a recorded interview that researchers who report unconventional breakthroughs can be pressured out of public view or 'disappear' from publishing, and said she felt forced to publish to protect herself.
- The Department of Energy's National Nuclear Security Administration gave Fox News a statement confirming it is aware of reports about employees at its labs, plants and sites and is 'looking into the matter.'
- President Trump told reporters he had 'just left a meeting' on the string of cases, called the situation 'pretty serious,' and said he hoped it was random but expected answers within roughly a week and a half.
- Fox names and visually highlights additional individuals in the cluster, including contractor Steven Garcia, Los Alamos–linked employees Melissa Casias and Anthony Chavez, and pharmaceutical scientist Jason Thomas, alongside previously noted names like Gen. McCasland and Monica Jacinto Reza.
April 16, 2026