What Happened to FBI Investigation into Deaths and Disappearances of Scientists Tied to Sensitive U.S. Research?
The White House and FBI launched a "holistic review" in April 2026 into the deaths and disappearances of at least 10-11 scientists and staff with ties to sensitive aerospace, nuclear, and defense research since 2023. This federal investigation aims to determine if there are any connections between these cases, which include several individuals from NASA's Jet Propulsion Laboratory and Caltech, amid growing national security concerns.
Quick Answer
As of April 22, 2026, the FBI is spearheading a comprehensive federal investigation, alongside the Department of Energy and other agencies, into the deaths and disappearances of at least 10-11 U.S. scientists and staff involved in sensitive aerospace and nuclear research since 2023. This "holistic review" was ordered by the White House to ascertain if these seemingly disparate incidents, including those involving personnel from NASA's Jet Propulsion Laboratory and Caltech, are connected or pose a national security threat. While no immediate national security threat has been confirmed, the pattern has raised significant concerns among lawmakers and intelligence experts.
📊Key Facts
📅Complete Timeline14 events
Texas A&M Professor Arrested for Undisclosed China Ties
Zhengdong Cheng, a Texas A&M University professor leading NASA research, was arrested on charges of conspiracy, making false statements, and wire fraud for allegedly obscuring his affiliations and collaboration with a Chinese university and company.
NASA JPL Scientist Michael David Hicks Dies
Michael David Hicks, a research scientist at NASA's Jet Propulsion Laboratory (JPL) who worked on the DART Project and Deep Space 1 Mission, died. His cause of death was not publicly disclosed.
U.S. Intelligence Warns of Foreign Espionage in Space Industry
U.S. intelligence agencies, including the National Counterintelligence and Security Center (NCSC) and the FBI, issued a warning about the growing threat of foreign intelligence entities and cyberattacks targeting the American space industry.
NASA JPL Principal Researcher Frank Maiwald Dies
Frank Maiwald, a 61-year-old principal researcher at NASA's Jet Propulsion Laboratory (JPL) specializing in space mission instruments, died in Los Angeles. His cause of death was not publicly released.
Los Alamos National Laboratory Staffer Anthony Chavez Disappears
Anthony Chavez, a former staffer at Los Alamos National Laboratory, disappeared from his home in New Mexico. Authorities found no signs of foul play, but exhaustive searches yielded no clues.
NASA JPL Aerospace Engineer Monica Jacinto Reza Goes Missing
Monica Jacinto Reza, a 60-year-old aerospace engineer at NASA's Jet Propulsion Laboratory (JPL) and Aerojet Rocketdyne, disappeared while hiking with a friend near Mount Waterman in the Angeles National Forest. She has not been found despite extensive searches.
NASA OIG Reports on University Grant Fraud with China Ties
NASA's Office of Inspector General (OIG) reported on an investigation into the University of Delaware for failing to disclose a professor's (Xiao-Hai Yan) ties to China in grant applications, resulting in a civil settlement for $715,580.
Government Contractor Steven Garcia Disappears
Steven Garcia, a government contractor with high-level security clearance working with nuclear weapons systems at the Kansas City National Security Campus, was reported missing.
Novartis Scientist Jason Thomas Goes Missing
Jason Thomas, a scientist and director at Novartis, went missing from his home in Wakefield, Massachusetts. His body was later recovered in March 2026.
Caltech Astrophysicist Carl Grillmair Fatally Shot
Carl Grillmair, a renowned 67-year-old astrophysicist at Caltech's Infrared Processing and Analysis Center (IPAC), which partners with NASA, was fatally shot on the front porch of his home in Llano, California. A suspect was arrested and charged with murder.
Retired Air Force Major General William Neil McCasland Disappears
Retired Air Force Major General William Neil McCasland, 68, a former commander of the Air Force Research Laboratory, was last seen at his home in Albuquerque, New Mexico, and has since been missing.
White House Acknowledges Concerns, Pledges Investigation
White House Press Secretary Karoline Leavitt stated that the administration views the reports of missing and dead scientists as serious and would investigate if the details are true, promising to consult relevant agencies.
White House and FBI Launch 'Holistic Review'
The White House and FBI launched a "holistic review" into 11 scientists tied to sensitive aerospace and nuclear research who have died or vanished since 2024, with four notable cases tied to LA County.
FBI Confirms Leading Federal Investigation
The FBI confirmed it is spearheading a federal investigation to look for connections into the cases of 10-11 missing or deceased scientists and staff from sensitive nuclear or space technology laboratories, working with the Department of Energy and other partners.
🔍Deep Dive Analysis
A series of deaths and disappearances of scientists and staff involved in sensitive U.S. aerospace, nuclear, and defense research began to draw federal scrutiny in early 2026. By April 2026, the White House and FBI officially launched a "holistic review" into at least 10-11 such cases that have occurred since 2023. These incidents include the deaths of Caltech astrophysicist Carl Grillmair and NASA JPL principal researcher Frank Maiwald, and the disappearances of NASA JPL aerospace engineer Monica Jacinto Reza and Los Alamos National Laboratory staffer Anthony Chavez.
The pattern of these incidents, particularly involving individuals with high-level security clearances and access to critical research, raised national security concerns among lawmakers and intelligence experts, prompting calls for a federal investigation. While some officials close to individual cases initially saw no links, the sheer number and sensitive nature of the roles involved led to a broader federal inquiry to determine if there are commonalities or foreign involvement. The broader context includes ongoing warnings from U.S. intelligence agencies about foreign espionage and cyberattacks targeting the American space industry and intellectual property.
Key turning points in this unfolding situation include the death of NASA JPL research scientist Michael David Hicks in July 2023, with an undisclosed cause, marking one of the earliest cases in the pattern. The disappearance of NASA JPL aerospace engineer Monica Jacinto Reza in June 2025 while hiking drew significant public attention. The fatal shooting of Caltech astrophysicist Carl Grillmair in February 2026 further intensified concerns. By April 2026, White House Press Secretary Karoline Leavitt confirmed the administration was looking into the reports, and the FBI officially announced it was spearheading a broad investigation into potential connections.
The investigations have heightened national security alerts regarding foreign intelligence threats to sensitive U.S. research. It has also led to increased scrutiny from Congress, with the House Oversight Committee announcing its own investigation. The incidents have fueled public speculation and conspiracy theories, though officials have not confirmed any links or foreign plots.
As of April 22, 2026, the FBI is actively leading a "holistic review" in coordination with the Department of Energy, Department of War, and state and local law enforcement partners to find answers and identify any potential commonalities among the 10-11 cases of dead or missing scientists. NASA has confirmed its cooperation with federal authorities, stating that no immediate national security threat has been identified, but pledging transparency as the inquiry progresses. President Trump has stated he expects more clarity within weeks.
What If...?
Explore alternate histories. What if FBI Investigation into Deaths and Disappearances of Scientists Tied to Sensitive U.S. Research made different choices?