Aerospace and Defense Researchers Vanish or Die Under Suspicious Circumstances: What’s Behind the Pattern?

Nearly a dozen researchers or people with links to aerospace or defense programs have disappeared or died in circumstances that some observers have deemed suspicious.

The cases involve individuals connected to sensitive U.S. Nuclear and aerospace research, including a retired Air Force general and NASA Jet Propulsion Laboratory researchers, whose deaths or disappearances have occurred under unexplained circumstances in recent years.

Among those cited is Michael David Hicks, a research scientist at NASA’s Jet Propulsion Laboratory who passed away on July 30, 2023, at the age of 59. The cause of his death was never made public, and no record of an autopsy could be found, according to reports. Hicks worked at JPL from 1998 to 2022 and contributed to multiple teams studying the physical properties of comets and asteroids, publishing over 80 scientific papers during his tenure.

Another case involves Frank Werner Maiwald, a NASA JPL principal researcher who died on July 4, 2024, in Los Angeles at age 61. His obituary confirmed his passing but noted that an autopsy was reportedly not performed. Maiwald, born in Ratingen, Germany, had built a career marked by contributions to both his personal and professional endeavors before his death.

The disappearance of Monica Reza, connected to NASA JPL projects, has also drawn attention. She has been missing since June 22, 2025, and her case is linked to that of retired Air Force General William “Neil” McCasland, who vanished from his New Mexico home. The Bernalillo County Sheriff’s Department in New Mexico confirmed It’s investigating McCasland’s disappearance, noting that he and Reza shared a close professional connection and disappeared within eight months of each other.

Reza has been described by some outlets as a “rocket scientist” due to her work on aerospace initiatives. Both individuals had professional ties to sensitive research programs, raising questions about potential patterns in their cases.

Federal scrutiny has intensified as the House Oversight Committee announced it will investigate reports of the deaths and disappearances of scientists who had access to sensitive scientific information. The committee stated that the reports “raise questions about a possible sinister connection” between the cases and is seeking briefings from the FBI, the Department of Defense, the Department of Energy, and NASA.

The FBI confirmed it is spearheading the effort to look for connections among the missing and deceased scientists, working with the Department of Energy, the Department of War, and state and local law enforcement partners. NASA said it is coordinating and cooperating with relevant agencies, emphasizing that at this time, nothing related to the cases indicates a national security threat.

In related developments, the death of Amy Eskridge, a researcher based in Huntsville, Alabama, has resurfaced as the 11th case in a growing list of individuals tied to U.S. Military, nuclear, and aerospace research who have died or disappeared under unusual circumstances. Eskridge worked in a region known for aerospace and defense research, where an F-1 engine from NASA’s Saturn V rocket is displayed at the Marshall Space Flight Center.

Authorities have not confirmed any link between the cases, but the pattern has prompted concern among lawmakers and officials. President Donald Trump addressed the issue publicly, stating he had “just left a meeting” on the matter and vowed answers within days, calling the situation “pretty serious.” White House press secretary Karoline Leavitt said the administration is working with all relevant agencies and the FBI to review the cases thoroughly and identify any potential commonalities.

As of April 21, 2026, the investigation remains ongoing, with federal agencies collaborating to determine whether the deaths and disappearances are connected or the result of unrelated circumstances.