Trump Dismisses the Missing Scientists Conspiracy Theory

President Donald Trump spent months treating the missing scientists conspiracy theory as a serious matter. Now he is backing away from it. Addressing reporters, Trump said the federal review of the cases had found "not much of a connection" between the deaths and disappearances of roughly 10 scientists, researchers, and technicians whose names fed the viral theory.

"There are thousands or even hundreds of thousands of scientists working for us, so 10 is a lot, but it's still a very small number compared to that," Trump said, according to reports of the briefing. "Some of them that we looked at are very sad cases, in some cases, some were sick, some left this earth self-inflicted. Some had other things. So far, we're finding that there's not much of a connection. We'll let you know."

A theory Trump himself boosted

The shift is striking because Trump gave the theory its biggest boost of all. In April, after Fox News raised the pattern of dead or missing researchers with access to classified material, Trump called the matter "pretty serious stuff" and said the administration would have answers "in the next week and a half," as reported by the New York Post. White House press secretary Karoline Leavitt said in a statement posted to X that the White House was "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."

The missing scientists conspiracy theory took off in early 2026, after the February disappearance of retired Air Force Maj. Gen. William "Neil" McCasland, the 68-year-old former commander of the Air Force Research Laboratory, from his home in Albuquerque. Online sleuths began assembling a roster of deaths and disappearances stretching back years, tying them to supposed secret knowledge of UFOs, anti-gravity research, and advanced energy programs. According to Wikipedia's summary of the cases, the people named died or disappeared under varied circumstances, including natural death, homicide, suicide, and hiking accidents, and the alleged cluster actually spanned four years rather than a few months.

The theory drew unusual institutional attention. The FBI said in April it was "spearheading the effort to look for connections into the missing and deceased scientists," and the House Oversight Committee opened its own inquiry, pushed by Rep. Eric Burlison, who called the cases "too coincidental." Oversight Chair James Comer said the deaths were unlikely to be a coincidence. Medical sociologist Robert Bartholomew offered a different explanation, describing the belief as apophenia, the human tendency to see patterns in random events, while Skeptic editor Michael Shermer said theorists were simply combing through biographies until they found links.

What the investigations actually found

Case by case, the alleged pattern kept falling apart. It is not the first time official channels have been pulled into viral speculation: the Pentagon has kept releasing its UFO case files while online sleuths mine them for hidden meanings, and a separate Trump-era grand conspiracy probe recently drew a subpoena for former CIA director John Brennan. On April 29, 2026, the FBI and the U.S. Attorney for the District of Massachusetts announced that Portuguese national Claudio Manuel Neves Valente was solely responsible for the murder of Nuno Loureiro, the MIT plasma physicist killed in the 2025 Brown University shooting, and that the killing had "no nexus to terrorism," with investigators tracing the motive to personal dissatisfaction. NASA said in late April that "nothing related to NASA indicates a national security threat." The National Nuclear Security Administration said it was "paying attention."

Other cases had equally ordinary, if tragic, explanations. JPL planetary scientist Michel David Hicks died of heart disease, his family said. Caltech astronomer Carl Grillmair was murdered in a carjacking, and a 29-year-old man was charged with the homicide. Novartis chemical biology director Jason Thomas drowned, with the Middlesex County medical examiner finding no foul play. Los Alamos administrative assistant Melissa Casias's remains were found in the Carson National Forest after she walked away from her life; her family and New Mexico State Police said she had left of her own volition amid financial stress. McCasland, whose disappearance started the whole thing, had held only routine clearances since retiring more than a decade earlier, according to his wife, and left behind his phone and other devices. The Bernalillo County sheriff said there was "no evidence indicating foul play."

Family members have been blunt about what the theory did to them. Grillmair's widow called the theory "absolute nonsense" and said her husband "would laugh" at those spreading it. Hicks's brother said it was anguishing to see his brother's scientific achievements reduced to a "Loch Ness Monster, Bigfoot conspiracy theory." One Caltech planetary scientist, Joe Masiero, who had worked with two of the deceased researchers, said it was "really unfortunate to see a tragedy played out over and over again" by the theory's promoters.

Trump did not declare the federal review closed. But his shift in tone is significant: the loudest signal boosting the "missing scientists" story came from the White House itself, and the White House is now saying the search found isolated tragedies instead of a plot. For a theory built on the idea that the government was hiding something, the government's answer turned out to be that there was nothing to connect.