FBI probes links between deaths, disappearances of 10 scientists

The FBI has taken the lead in examining whether at least 10 deaths and disappearances among scientists and government workers are tied together, a move that has intensified scrutiny of cases spanning nuclear, aerospace and classified programs. Officials say the review will look for “any potential commonalities,” but they have not confirmed a proven link among the incidents.

The White House confirmed the effort on April 17, 2026, describing it as a “holistic” review involving the FBI, the Department of Energy, NASA, the Department of War and state and local law enforcement. Press secretary Karoline Leavitt said the administration would “leave no stone unturned,” while President Donald Trump called the matter “pretty serious stuff” and also suggested the deaths and disappearances could be coincidence. That balance, between caution and skepticism, reflects the evidence threshold now shaping the inquiry: investigators are being pressed to determine whether the cases form a pattern or only appear to do so because they involve sensitive work.

The names under review are drawing attention because many were linked to institutions and projects with national security implications. Publicly reported connections include NASA’s Jet Propulsion Laboratory, Los Alamos National Laboratory and MIT, along with a pharmaceutical researcher and a government contractor at a nuclear weapons component production facility. The reported cases stretch over several years and include people tied to nuclear, aerospace and classified research programs, fueling anxiety in agencies where access to information is tightly controlled and security clearances are common.

Among the cases already in public view is retired Air Force Gen. William Neil McCasland, who disappeared from his home in Albuquerque, New Mexico, in February 2026 and remains missing. Other reports refer to two more people affiliated with NASA JPL, two affiliated with Los Alamos National Laboratory and an MIT scientist working on nuclear fusion. Officials have not said whether any of the cases share a cause, a location, a workplace or any other verified connection.

Congress moved Monday to force more disclosure. House Oversight Committee Chairman James Comer and Rep. Eric Burlison sent letters to the FBI, the Department of Energy, NASA and the Department of War seeking briefings by April 27. Their inquiry said the reported deaths and disappearances may pose a “grave threat” to U.S. national security. For scientists and government workers across the nuclear and aerospace sectors, the federal response has turned a cluster of unsettling cases into a question with immediate institutional consequences: whether the country is confronting a security problem, or a set of tragedies that only look linked from a distance.