Key Points
- FBI coordinating multi-agency probe with defence and energy departments
- Congressional panel seeks briefings from federal agencies
- Several cases remain unsolved, fuelling online theories
- Authorities caution against linking incidents without evidence
WASHINGTON: The Federal Bureau of Investigation (FBI) has announced it will spearhead a coordinated inquiry into whether any connections exist between a series of seemingly unrelated deaths and disappearances involving scientists and government personnel across the United States.
The move follows mounting speculation online regarding at least 10 such cases recorded since 2022, many of which involve individuals who, at some stage in their careers, had access to sensitive scientific or government information. While no confirmed links have been established, the clustering of cases has drawn public attention and prompted calls for a formal investigation.
The issue gained further traction after US President Donald Trump revealed last week that the matter had been discussed at a high-level meeting. Speaking to reporters, he described the situation as “pretty serious,” adding that authorities hoped the incidents would ultimately prove to be coincidental.
In a statement issued on Monday, the FBI said it would collaborate with the Department of Energy, the Department of Defence, and state and local law enforcement agencies to “find answers”. Parallel to this, the House Oversight Committee has initiated its own inquiry, requesting briefings from multiple federal bodies including the FBI, the Pentagon, the Department of Energy and NASA.
The committee’s request specifically seeks information regarding the “disappearance and death of individuals with access to sensitive US scientific information”, reflecting growing concern within political circles.
According to NBC News, among the cases fuelling speculation is the disappearance of retired Air Force Major General Neil McCasland, who went missing earlier this year from his home in New Mexico. Authorities reported that he left behind his phone and glasses but appeared to have taken hiking boots, his wallet, and a firearm before departing. Despite extensive searches, his whereabouts remain unknown.
Online theories have attempted to link McCasland’s disappearance to his previous work, including involvement in programmes connected to advanced aerospace research. However, his wife, Susan McCasland Wilkerson, has firmly rejected such claims, noting that he retired more than a decade ago and no longer held sensitive clearances.
She also dismissed speculation tying his disappearance to unidentified aerial phenomena (UAPs), clarifying that his limited association with a private group exploring UFO-related topics did not involve access to classified information.
Another widely discussed case is that of Monica Reza, a former NASA scientist specialising in rocket materials, who vanished in June 2025 while hiking in California’s Angeles National Forest. Her case remains unsolved, with local authorities continuing their investigation.
The death of Carl Johann Grillmair, a prominent scientist affiliated with the California Institute of Technology, has also contributed to the growing unease. He was fatally shot in February, and although a suspect has been arrested, investigators have not disclosed a motive, leaving room for speculation.
Earlier cases have similarly been drawn into online narratives, including the 2022 death of anti-gravity researcher Amy Catherine Eskridge, officially ruled a suicide. Additionally, the killing of Massachusetts Institute of Technology physicist Nuno Loureiro has been cited, despite authorities identifying and closing that case, in which the gunman later died by suicide.
Law enforcement officials have repeatedly cautioned against drawing premature conclusions, emphasising that, to date, no evidence suggests a coordinated pattern or targeted campaign. NASA also stated it is cooperating fully with investigators and has found no indication of any national security threat linked to its personnel.
Nevertheless, the convergence of high-profile cases, combined with their connection—however indirect—to sensitive research fields, has sustained public and political interest. As federal agencies begin their coordinated review, officials face increasing pressure to determine whether these incidents are purely coincidental or indicative of a deeper underlying issue.
A few days ago, the White House had tasked the FBI with reviewing a series of cases involving U.S. scientists who have died or gone missing since 2023, amid growing concern over possible links. Press Secretary Karoline Leavitt said the administration is coordinating with relevant agencies to examine the incidents collectively, particularly as many of those involved had connections to sensitive fields such as space and nuclear research.
She said the review is being conducted in line with Donald Trump’s directive to establish the facts, stressing that authorities will “leave no stone unturned” and will share updates as they emerge. At least 10 such cases have been reported in recent years, some under unclear circumstances, prompting speculation about potential common factors.
