In regards to the mysterious deaths or disappearances of multiple American scientists working in the fields of nuclear energy or space exploration, Chris Swecker, former Assistant Director of Criminal Investigations at the Federal Bureau of Investigation (FBI), believes it may be related to acts of “modern espionage” by hostile nations against the United States.
Swecker recently stated during an interview on Fox News’ program “The Story” that the cases of numerous American scientists and employees vanishing or dying under suspicious circumstances in recent years, who had previously worked in sensitive nuclear energy or space technology laboratories, are indeed questionable. He remarked, “These cases are indeed suspicious. When you observe the patterns of these events, it does raise questions.”
“The research fields these individuals were involved in are of high interest to foreign intelligence agencies… particularly China (CCP) and Russia. But it could also include countries like Iran, and even Pakistan.”
Swecker believes, “This exhibits characteristics of modern espionage activities. However, this does not mean we can definitively conclude it, but it does fit the profile of such activities.”
Yet, Swecker also noted, “It is still too early to draw definitive conclusions. We currently do not have enough evidence to link all these events together.”
He emphasized, “These cases warrant a thorough investigation… Law enforcement and intelligence agencies should closely monitor these events.” He stated that the FBI is responsible for handling espionage issues and should ascertain if anyone is intentionally sabotaging American technology.
Republican Federal Congressman Eric Burlison also appeared on the program, expressing his viewpoint that the disappearance of numerous top American scientists involved in defense and nuclear energy fields is “abnormal.”
The disappearance of retired Air Force Major General William Neil McCasland has garnered media attention. In February 2026, McCasland went missing from his home in Albuquerque, New Mexico, carrying a .38 caliber revolver, and has remained unaccounted for since then. However, his phone, keys, and glasses were left behind at home.
McCasland had held highly sensitive positions within the U.S. military, such as serving as the Chief Engineer for the Department of Defense’s Global Positioning System (GPS) project, the Systems Project Manager for the Airborne Laser project office, and as a special projects manager in the Pentagon. He also commanded the Air Force Research Laboratory at Wright-Patterson Air Force Base. In the early stages of his disappearance, some speculated that McCasland’s vanishing might be related to extraterrestrial beings, but experts have dismissed this notion, and his wife has denied such claims.
A prominent member of the U.S. House of Representatives issued a letter to various federal agencies on April 21, urging for an investigation to uncover potential links among this series of mysterious cases and ascertain any broader national security risks.
Aside from General McCasland, other missing or deceased individuals include:
– 60-year-old NASA scientist Monica Jacinto Reza,
– 48-year-old government contractor Steven Garcia,
– 47-year-old astrophysicist Carl Grillmair,
– 47-year-old physicist Nuno Loureiro from MIT,
– 61-year-old NASA engineer Frank Maiwald,
– 59-year-old NASA researcher Michael David Hicks,
– Pharmaceutical scientist Jason Thomas,
– Employees Melissa Casias and Anthony Chavez associated with the Los Alamos National Laboratory.
The FBI recently confirmed that they are “leading the investigation into the connection among the missing and deceased scientists. We are collaborating with the Department of Energy, the Department of Defense, as well as state and local law enforcement agencies to find answers.”