FBI and White House launch holistic review of 11 scientists tied to sensitive US nuclear and aerospace programs who died or vanished since 2024
The FBI, Department of Energy, Department of Defense, and NASA are conducting a coordinated review of at least 10 (Fortune and Newsweek count 11) scientists with ties to US nuclear and aerospace programs who died or disappeared since 2024, after House Oversight chairs Comer and Burlison sent letters to all four agencies demanding briefings no later than April 27. Cases include MIT plasma physicist Nuno Loureiro, fatally shot outside his Massachusetts home in December 2025; retired Air Force Maj. Gen. William Neil McCasland, who vanished from Albuquerque on February 27 leaving behind his phone, glasses, and wearables; and aerospace engineer Monica Reza, missing since a June 2025 Los Angeles-area hike. Rep. Burlison stated the cluster has 'all the hallmarks of a foreign operation,' while officials close to the separate investigations told CNN they have not established links between the cases, and Energy Secretary
The FBI's assumption of active lead in a joint DOE-DoD counterintelligence review, converting Comer and Burlison's oversight letters into operational investigative authority, is the baseline IC response pattern when the community suspects foreign-intelligence-service targeting of cleared personnel, and the chairmen's "foreign operation" framing is the language used to secure preemptive hearing authority before forensic conclusions exist. Wright's "nothing alarming yet" (Fortune, on-the-record) is a narrow individual-case statement, not a cross-case assessment; calling eleven deaths across domains an assassination campaign would trigger retaliatory posture obligations no agency is prepared to commit to absent evidence. Corroborated across CNN and CBS via named federal investigators, the joint DOE-DoD tasking is real, but a unified FSB or MSS hand across this cluster is unlikely to emerge from forensics over the next 60 days given the diversity of victim profiles and geographies; Newsweek's count of 11 versus CNN's 10 reflects case-inclusion judgment, not factual disagreement. The cluster may instead be entirely explicable by base-rate mortality and media clustering bias, in which case the coverage is the operational risk, having generated a legible targeting list for adversaries who authored none of the original deaths. Either way, a cluster sustained at this tempo is very likely to degrade clearance-holder recruitment pipelines over the coming year, pipelines already stressed by post-IC-workforce cuts.
3 sources
- At least 10 scientists tied to sensitive US research have died or disappeared in recent years, sparking federal investigation -
CNN - FBI investigating deaths and disappearances of staff at secretive government laboratories -
CBS News - Top Republican says dead, missing scientists are national security threat -
Newsweek