Between 2022 and early 2026, at least eleven individuals with connections to U.S. aerospace, nuclear, or advanced research programs died or vanished. Two were shot in their homes. Three disappeared without a trace. Others died under circumstances that have never been publicly explained. For years, the cases existed as isolated data points — local news stories, brief obituaries, a missing persons report filed with a county sheriff. Then someone drew lines between them.
In April 2026, the FBI confirmed it is “spearheading the effort to look for connections into the missing and deceased scientists.” The House Oversight Committee sent formal letters to the directors of the FBI, NASA, the Department of Energy, and the Department of Defense. President Trump called the situation “pretty serious stuff.” The question that has consumed online communities for months — whether these deaths and disappearances share a common cause — is now an official federal investigation.
What follows is what the public record actually contains. Not speculation. Not pattern-matching. The documented facts about each case, what is known, what remains unexplained, and where the gaps are.
The List
The cases span four states and multiple institutional affiliations. Michael David Hicks, a research scientist at NASA’s Jet Propulsion Laboratory who worked on asteroid and comet research, died in July 2023 at age 59. His obituary did not disclose a cause of death. His daughter told CNN he had medical problems and that “there’s no train of logic to follow that would implicate him in this potential federal investigation.”
Frank Maiwald, a principal investigator at JPL who managed Earth-observing and space instrumentation projects, died in July 2024. No public information regarding his cause of death has been released.
Nuno Loureiro, 47, director of MIT’s Plasma Science and Fusion Center and a recipient of the Presidential Early Career Award, was fatally shot at his home in Brookline, Massachusetts on December 15, 2025. Authorities identified the gunman as Claudio Neves Valente, a former physics classmate from Portugal who also killed two Brown University students days earlier before taking his own life. A motive has not been established, though police have not released evidence suggesting motives beyond personal grievance.
Carl Grillmair, 67, a Caltech astrophysicist who worked on NASA’s infrared telescope projects and discovered water on a distant planet, was fatally shot at his home outside Los Angeles on February 16, 2026. Authorities arrested 29-year-old Freddy Snyder for the murder. They do not believe Snyder knew Grillmair.
Retired Air Force Major General William Neil McCasland disappeared from his Albuquerque, New Mexico home on February 27, 2026. He remains missing. His wife publicly mentioned his ties to the “UFO community.” The FBI’s Homicide Bureau has been involved in the investigation.
Monica Reza, Director of the Materials Processing Group at NASA’s Jet Propulsion Laboratory, disappeared while hiking on Angeles Crest Highway in California in June 2025. She has not been found. She held patents on a nickel super-alloy used in both space travel and weaponry. The House Oversight Committee flagged that Reza and McCasland had worked together on “an Air Force-funded research program in the early 2000s pertaining to advanced materials needed for reusable space vehicles and weapons.”
Three individuals connected to Los Alamos National Laboratory or the Kansas City National Security Campus — Anthony Chavez, Melissa Casias, and Steven Garcia — disappeared in New Mexico between May and August 2025. Jason Thomas, a pharmaceutical researcher at Novartis, went missing in December 2025 and was found dead in a Massachusetts lake in March 2026. Authorities do not suspect foul play. Amy Eskridge, an antigravity researcher in Huntsville, Alabama, died in June 2022 in what was ruled a suicide — a ruling contested by independent investigators whose findings were submitted to Congress.
The Institutional Response
House Oversight Committee Chairman James Comer stated that the pattern was unlikely to be coincidental. “Once you see the facts, it would suggest that something sinister could be happening and it would be a national security concern,” Comer told Fox News. He and Congressman Eric Burlison sent letters to FBI Director Kash Patel, Defense Secretary Pete Hegseth, Energy Secretary Chris Wright, and NASA Administrator Jared Isaacman, requesting staff-level briefings by April 27, 2026.
FBI Director Patel stated on Fox News: “We’re going to look for connections on whether there are connections to classified access, access to classified information, and or foreign actors. If there’s any connections that lead to nefarious conduct or conspiracy, this FBI will make the appropriate arrest.”
The White House confirmed it 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.” NASA stated it is “coordinating and cooperating with the relevant agencies” but added that “nothing related to NASA indicates a national security threat.”
What the Pattern Does and Does Not Show
Several things are true simultaneously. The cases vary enormously in circumstance. Two involve identified suspects with no apparent connection to the victims’ research. One family explicitly attributes the death to preexisting medical conditions. At least two cases — Hicks and Maiwald — have no public information about cause of death at all, which means they cannot be evaluated in either direction.
Meanwhile, the geographic clustering around high-security research hubs — four cases near Los Alamos and Sandia in New Mexico, four near JPL and Caltech in California — is the kind of pattern that demands investigation precisely because it could be coincidence or could be something else. The base rate matters: thousands of scientists work at these facilities. Some of them will die or go missing in any given period. Whether the rate among this specific population exceeds statistical expectation is a question no one has publicly answered with data.
The foreign adversary hypothesis — that a state actor is targeting scientists with access to classified research — is the most discussed possibility. Comer named China, Iran, Russia, and North Korea as “usual suspects” while acknowledging it “could be a coincidence.” However, if the motive were intelligence collection, the killing or disappearance of sources represents a catastrophic operational failure, not standard espionage tradecraft. Intelligence services typically recruit assets. They do not typically eliminate them.
The alternative — that these cases are unconnected tragedies amplified by pattern-seeking attention — is also consistent with the evidence. It is less dramatic. It may also be correct.
What Happens Next
The FBI investigation is ongoing. Congressional briefings were requested by late April 2026. The Department of Defense told the Oversight Committee it was not independently investigating missing persons associated with the scientists — a statement that itself raises questions about interagency coordination on what Congress has called a potential national security threat.
The verified facts are narrower than the mythology forming around them. Several of these deaths have identified suspects or documented medical explanations. Others remain genuinely unexplained. The responsible position is not to declare a conspiracy or to dismiss the pattern, but to insist that each case be investigated on its own evidence — and to note, as the House Oversight Committee has, that the collective picture warrants federal attention regardless of whether the cases are ultimately connected.
Eleven names. Multiple agencies. One investigation. No answers yet.
“It does appear that there’s a high possibility that something sinister is taking place here. It’s very unlikely that this is a coincidence.” — Chairman James Comer, House Oversight Committee, April 2026
Sources & Further Reading
- House Oversight Committee — Comer & Burlison Letters (April 2026)
- CNN — “At least 10 people tied to sensitive US research have died or disappeared” (April 2026)
- Fortune — FBI Looks Into Dead or Missing Scientists (April 2026)
- Newsweek — FBI Investigating Missing and Dead Scientists (April 2026)
- Axios — Missing Scientists Working on Space and Nuclear Projects Alarm Congress (April 2026)
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