The man who oversaw every classified Special Access Program in the United States Department of Defense walked out of his Albuquerque home on the morning of February 27, 2026, left his phone, his glasses, and his wearable devices on a table, took a .38-caliber revolver and a backpack, and has not been seen since. Retired Air Force Major General William Neil McCasland, 68, controlled a $4.4 billion science and technology portfolio at Wright-Patterson Air Force Base spanning directed-energy weapons, hypersonic propulsion, classified satellite systems, and advanced aerospace materials. As executive secretary of the Special Access Program Oversight Committee, he held legal visibility over every compartmented program in the entire Department of Defense. His name appeared in the 2016 WikiLeaks release of emails from John Podesta, in which musician and UAP researcher Tom DeLonge described McCasland as having first-hand knowledge of non-human craft and crash retrieval programs, and as someone personally aware of what was stored inside the laboratory he commanded. DeLonge wrote that McCasland had helped assemble the advisory team working on public UAP disclosure. McCasland’s wife stated publicly that her husband has no special knowledge of extraterrestrial bodies or debris, that he was not confused or disoriented on the day he vanished, and that she told emergency dispatchers he left on foot and appeared not to intend to return.
His disappearance was the ninth incident in a sequence running from July 2023 to February 2026, involving scientists, engineers, and researchers whose collective expertise spans asteroid deflection, advanced rocket propulsion, nuclear fusion, infrared space surveillance, planetary life detection, and the physics of plasma confinement. Eight months before McCasland vanished, Monica Reza, a 60-year-old aerospace engineer and the co-inventor of a classified-grade rocket superalloy funded directly by McCasland’s laboratory, disappeared while hiking in the Angeles National Forest on June 22, 2025. She was last seen at 9:10 a.m. waving to a companion on the Upper West Ridge Trail near Mount Waterman. Extensive searches involving helicopters, dogs, drones, and dozens of volunteer teams found two personal items: a beanie and a tube of lip balm. No body. No forensic trail. She remains a missing person under the jurisdiction of the Los Angeles County Sheriff’s Homicide Bureau.
To understand why these cases have alarmed members of Congress, prompted requests for FBI involvement, and drawn the attention of former senior intelligence officials, it is necessary to understand not just who these nine people were, but what they collectively knew. Taken individually, each case carries its own circumstances, its own local investigation, its own partial explanation. Taken together, the nine represent something more specific: a near-complete map of the most strategically sensitive areas of American science and technology, with each person holding a distinct and non-redundant piece of that map. No single one of them knew everything. Together, they knew most of it.
Frank Maiwald spent 25 years at NASA’s Jet Propulsion Laboratory in Pasadena, California, rising to the title of JPL Principal, an internal designation awarded to scientists making outstanding individual contributions. He managed the development of the Surface Biology and Geology Visible Shortwave Infrared instrument and oversaw delivery of two instruments for the Advanced Microwave Radiometer Climate Quality program, a sensor system flying on European Sentinel satellites that measures ocean surface conditions and atmospheric water vapor with precision relevant to both climate monitoring and military navigation. Thirteen months before his death on July 4, 2024, he led a breakthrough in passive radio detection of subsurface liquid water in Jupiter’s icy moons, a technique that scans for oceans beneath the surface of Europa and Enceladus from orbit without landing. He died at 61 in Los Angeles. No cause of death has been publicly released. No autopsy record has been located.
NASA and JPL declined to comment on Maiwald’s death when approached by media. The only public record of his passing is a single online obituary, in which colleague after colleague describes his death as sudden and shocking, with no mention of illness or health decline in the months prior. A colleague wrote that Maiwald had been actively engaged in ongoing projects and making plans for the future. No press release from JPL. No memorial statement from NASA. No local news coverage. His obituary is the only public record that Frank Werner Maiwald existed and then stopped existing.
Michael David Hicks worked at JPL from 1998 to 2022, publishing more than 80 scientific papers and contributing to four major missions. The Deep Space 1 probe, which flew past the comet Borrelly in 2001, tested 12 experimental technologies in a single flight. The Near Earth Asteroid Tracking project catalogued near-Earth objects for planetary defense. The Dawn Mission orbited the asteroid Vesta and the dwarf planet Ceres, characterising their composition and structure. The DART project, completed in 2022, tested whether a spacecraft impact could measurably alter the trajectory of an asteroid on a collision course with Earth, and confirmed that it could. Hicks died on July 30, 2023, at 59, roughly one year after leaving JPL. No cause of death has been publicly disclosed. No autopsy record is publicly available. His online memorials contain no reference to illness. JPL has not commented.
Monica Reza spent decades at Aerojet Rocketdyne as a Technical Fellow in advanced materials, where she co-invented Mondaloy, a family of nickel-based superalloys engineered to withstand the extreme heat and high-pressure oxygen environments inside rocket preburners and turbines. Prior to Mondaloy, American rocket manufacturers could not build oxygen-rich staged combustion engines at the performance levels achieved by Soviet programs, which is why the United States relied on Russian-made RD-180 engines to lift classified military satellites for decades. Its composition, worked out by Reza and her colleague Dallis Hardwick in the mid-1990s, allowed 12 critical engine components to survive temperatures and pressures that would burn or fracture any previously available American alloy. By 2016, Aerojet Rocketdyne had used Mondaloy 200 in a major test-fire milestone for the Hydrocarbon Boost program, publicly described by an Air Force general as central to eliminating U.S. dependence on foreign rocket propulsion for national security launches. McCasland’s laboratory at Kirtland Air Force Base funded and qualified Mondaloy from 1999 onward. When Reza’s team shipped material data for government qualification testing, it arrived inside McCasland’s program. At the time she disappeared in June 2025, she had moved to NASA’s Jet Propulsion Laboratory as Director of the Materials Processing Group, less than a year into that role.
Anthony Chavez, a former employee at Los Alamos National Laboratory in New Mexico, the birthplace of the atomic bomb and the primary U.S. facility for nuclear weapons design and classified physics research, vanished between May 4 and 8, 2025, leaving behind his wallet, his keys, his cigarettes, and his phone. Cadaver dogs found no trace. He is still missing. Four days after Reza’s disappearance, Melissa Casias, an administrative assistant at Los Alamos with top security clearance, disappeared from her residence on June 26, 2025. Surveillance footage showed her staggering on a road miles from her home. Both her mobile devices had been factory-reset before she was reported missing, and she left without her wallet or keys. She is still missing. The near-simultaneous disappearance of two Los Alamos-connected individuals, one technical and one administrative with high-level clearance access, within four days of each other and within days of Reza’s vanishing in California, produced no coordinated federal statement. The three cases were treated as separate local missing-person investigations.
Nuno Loureiro, 47, was the director of MIT’s Plasma Science and Fusion Center, MIT’s largest research laboratory, and the recipient of the Presidential Early Career Award for Scientists and Engineers, the highest U.S. government honour for young researchers, presented in January 2025. His specific scientific contribution was solving a problem that had blocked commercial nuclear fusion for more than 50 years: why magnetic reconnection, the process by which opposing magnetic fields suddenly snap apart and reform, causes catastrophic plasma crashes inside fusion reactors, dropping the plasma temperature below the threshold required for fusion to sustain itself. Loureiro showed that the half-century-old textbook model for how this happens was itself unstable, and that the real physical mechanism is dramatically faster and more destructive than any prior model predicted. His laboratory was working in direct partnership with Commonwealth Fusion Systems, a private company spun out of MIT that had raised close to $3 billion in private funding by late 2025 and was approximately 65 percent complete on a demonstration reactor targeting net energy gain by 2027.
On December 15, 2025, a man named Claudio Manuel Neves Valente rang the doorbell of Loureiro’s home in Brookline, Massachusetts. Loureiro’s 12-year-old daughter ran to answer it. Her father followed behind her and told her to come back inside. Seconds later she heard three or four gunshots. Loureiro was transported to Beth Israel Deaconess Medical Center with multiple gunshot wounds and was pronounced dead in the early hours of December 16. Valente had driven directly to Loureiro’s home from Brown University, where two days earlier he had allegedly shot 13 people in a campus building, killing two, according to authorities. He was identified as a former classmate of Loureiro’s from their undergraduate physics program in Lisbon in the late 1990s. His motive has not been publicly established.
Carl Grillmair, 67, was a research scientist at Caltech’s Infrared Processing and Analysis Center who spent 29 years working on NASA telescope missions including Hubble, Spitzer, and the Wide-field Infrared Survey Explorer. He served as a quality assurance scientist and pipeline operator for the NEOWISE Science Data Center, processing every asteroid and comet detection produced by a space-based infrared telescope whose sensor technology has direct military application for tracking fast-moving objects, including hypersonic missiles and maneuvering satellites. He logged more than 400 hours of Hubble time as a principal investigator and more than 2,700 hours as a co-investigator across 29 years, and published 147 peer-reviewed papers, with three more in preparation at the time of his death. In 2007 he led a study that for the first time captured enough light from a planet outside our solar system to identify specific molecules in its atmosphere, including water. At the time of his death he was installing new instrumentation at Caltech’s Palomar Observatory to monitor for meteor impacts on the Moon’s surface during a lunar eclipse.
He was found with a single gunshot wound to the torso on the front porch of his home in Llano, California, in the high desert 75 miles north of Los Angeles, at 6:10 a.m. on February 16, 2026. A suspect, 29-year-old Freddy Snyder, was charged with his murder. Snyder had previously been arrested for trespassing on Grillmair’s property while carrying an unregistered rifle on December 20, 2025. That felony weapons charge was dropped and he was released. Fifty-eight days later he allegedly returned and shot the man who had reported him, and has since been charged with murder. Caltech’s official public statement described Grillmair as having passed away suddenly, without using the word shot, the word killed, or the word murder.
Jason Thomas, assistant director of chemical biology at Novartis Institutes for BioMedical Research, with active Department of Defense contracts attached to his work, disappeared on December 12, 2025. His body was recovered from a lake in Wakefield, Massachusetts, on March 17, 2026, three months and five days after he was reported missing. No foul play has been formally confirmed. No cause of death has been publicly disclosed.
What makes this cluster resistant to casual dismissal is not the number alone, though nine incidents concentrated in less than three years across a closely related set of institutions is statistically unusual by any measure. It is the specific nature of what each person knew, and the degree to which those areas of knowledge interlock without overlapping. Hicks and Maiwald both worked at JPL and both held operational knowledge of what the telescopes scanning near-Earth space were detecting daily, including objects whose composition, trajectory, and origin fall outside standard catalogue classifications. Grillmair processed and validated the infrared data pipeline that produced those detections, and held direct knowledge of what the sensor systems could and could not resolve at the limits of their capability. Reza built the alloy that made American engines capable of reaching whatever those sensors were tracking, and McCasland controlled the budget and the classified access that connected the propulsion program to the retrieval programs. Loureiro was solving the last major physics problem standing between existing technology and a contained, self-sustaining plasma energy source, the same physical process that powers stars. Chavez and Casias both carried security clearances into Los Alamos, the facility that designs and certifies every nuclear weapon in the American arsenal and conducts classified research into materials and energy at scales well beyond what is publicly documented.
Former FBI Assistant Director Chris Swecker told the Daily Mail that the pattern raises immediate red flags for potential espionage operations. Foreign intelligence services, particularly those of Russia and China, have targeted American scientists working on rocket propulsion, nuclear research, and advanced sensor systems for decades. Los Alamos has been breached before: physicist Wen Ho Lee was arrested in 1999 on 59 counts of mishandling nuclear secrets, and the laboratory has faced repeated counterintelligence investigations in the years since. The technologies these nine people worked on, propulsion alloys that freed U.S. military launches from Russian engines, fusion containment physics that would make classified energy-intensive programs independent of any external fuel supply, infrared detection systems with direct missile-tracking applications, represent precisely the categories that hostile state intelligence services prioritise for collection.
Missouri Republican Eric Burlison requested FBI involvement in February 2026, telling Fox News that McCasland’s departure from his home while leaving every communication device behind is “remarkable” and “deeply concerning,” and that the pattern cannot be attributed to coincidence without a serious federal examination. Tennessee Republican Tim Burchett told multiple outlets that the concentration of incidents in specific research fields is too high to ignore, that intelligence agencies have been unhelpful when his office approached them, and that the effect on the UAP research community has been a measurable chilling effect, with sources who previously spoke now refusing contact. In March 2026, members of Congress held a classified briefing in a secured facility regarding McCasland’s disappearance and its relationship to UAP programs. The content of that briefing has not been made public.
NASA issued no statement on Hicks. JPL issued no statement on Maiwald or Reza. Caltech’s announcement on Grillmair omitted the manner of his death. Wright-Patterson Air Force Base, where three additional personnel with top-secret clearances died in an October 2025 incident captured on security cameras, issued no investigative statement and offered only counseling services. No agency has publicly connected any of the nine cases. No coordinated federal investigation has been announced. The FBI confirmed involvement in the McCasland search, but has not indicated it is examining the broader pattern across all nine incidents.
As of April 2026, four of the nine remain missing: McCasland, Reza, Chavez, and Casias. Three are confirmed dead with no cause of death on public record: Hicks, Maiwald, and Thomas. Two were shot dead in their homes: Loureiro and Grillmair. The Bernalillo County Sheriff’s Office tip line for the McCasland investigation remains active at 505-468-7070. No confirmed sightings of McCasland have been recorded since the morning of February 27, 2026.
Sources & Further Reading
William Neil McCasland Newsweek: https://www.newsweek.com/who-is-william-neil-mccasland-ex-us-general-linked-to-ufo-research-missing-11609887 Newsweek: https://www.newsweek.com/missing-us-general-has-information-ufos-congressman-11684617 Newsweek: https://www.newsweek.com/congressman-calls-for-fbi-help-over-missing-general-scientists-11764096 CNN: https://www.cnn.com/2026/03/11/us/retired-air-force-general-fbi-search CNN: https://www.cnn.com/2026/03/17/us/fbi-search-william-mccasland-general-missing ABC7: https://abc7.com/post/william-neil-mccasland-missing-retired-us-air-force-major-general-commanded-base-long-associated-ufo-lore/18707800/ Military.com: https://www.military.com/daily-news/air-force/2026/03/15/missing-air-force-general-case-draws-fbi-and-online-conspiracy-theories.html NewsNation: https://www.newsnationnow.com/missing/who-is-william-neil-mccasland/ NewsNation: https://www.newsnationnow.com/missing/neil-mccasland-missing-timeline/
Monica Reza Newsweek: https://www.newsweek.com/monica-reza-case-gains-attention-after-disappearance-us-general-11698172 The Sentinel Network: https://thesentinel.network/p/the-green-burial-she-was-declared SpaceNews (Mondaloy): https://spacenews.com/what-is-mondaloy-and-why-should-you-care/ Aerospace Testing International: https://www.aerospacetestinginternational.com/news/engine-testing/usaf-demonstrates-key-rocket-engine-technologies.html We Got This Covered: https://wegotthiscovered.com/fyi/this-super-alloy-could-end-american-dependence-on-russian-rockets-now-two-officials-involved-in-its-development-are-missing/ Michael R Cronin: https://www.michaelrcronin.com/post/monica-reza-aerospace-engineer-missing-vanished-disappearance Unknown Country: https://unknowncountry.com/dreamland/the-disappearance-of-monica-jacinto-reza/ WION: https://www.wionews.com/trending/the-mondaloy-mystery-two-aerospace-experts-with-ties-to-special-projects-go-missing-triggering-security-concerns-1774248547608
Frank Maiwald Legacy.com obituary: https://www.legacy.com/us/obituaries/legacyremembers/frank-maiwald-obituary?id=55630404 Legacy.com memorial: https://www.legacy.com/us/obituaries/legacyremembers/frank-maiwald-memorial?id=55630404 The Sentinel Network: https://thesentinel.network/p/the-blind-spot-rocks-are-falling
Michael David Hicks Newsweek: https://www.newsweek.com/list-dead-or-missing-scientists-suspicious-michael-david-hicks-11805585 OAN: https://www.oann.com/newsroom/ninth-scientist-added-to-growing-list-of-nasa-linked-deaths-and-disappearances/ NewsNation: https://www.newsnationnow.com/missing/michael-david-hicks-ufo-death-missing/
Nuno Loureiro Wikipedia: https://en.wikipedia.org/wiki/Nuno_Loureiro MIT News: https://news.mit.edu/2025/nuno-loureiro-professor-director-plasma-science-and-fusion-center-dies-1216 MIT Physics: https://physics.mit.edu/faculty/nuno-gomes-loureiro/ MIT President statement: https://president.mit.edu/writing-speeches/professor-nuno-loureiro-1977-2025 MIT Plasma Science Center: https://www.psfc.mit.edu/about/people/leadership/nuno-f-g-loureiro/ Newsweek: https://www.newsweek.com/mit-professor-fatally-shot-nuno-loureiro-research-11226085 NextBigFuture: https://www.nextbigfuture.com/2025/12/207754.html IPP Max Planck Institute: https://www.ipp.mpg.de/5590942/Nachruf_Loureiro Jessica Reed Kraus: https://jessicareedkraus.substack.com/p/a-second-scientist-shot-dead-on-the
Carl Grillmair Wikipedia: https://en.wikipedia.org/wiki/Carl_Grillmair Caltech official obituary: https://www.caltech.edu/about/news/caltech-mourns-the-passing-of-carl-grillmair-19592026 IPAC Caltech: https://www.ipac.caltech.edu/news/408 Carl Grillmair CV: https://web.ipac.caltech.edu/staff/carl/cgcv.html Pasadena Now: https://pasadenanow.com/main/la-county-board-honors-slain-caltech-astrophysicist-who-worked-in-pasadena-for-nearly-30-years
The Broader Pattern Newsweek: https://www.newsweek.com/mystery-over-8-missing-or-dead-experts-linked-to-ufo-research-11792852 Men’s Journal: https://www.mensjournal.com/news/missing-scientists-dead-nuclear-full-list-how-many Based Underground: https://basedunderground.com/the-dead-scientists-story-must-not-go-away/ Michael R Cronin: https://www.michaelrcronin.com/post/mystery-surrounds-death-of-ninth-scientist-tied-to-us-secrets-as-disturbing-pattern-grows American Almanac: https://americanalmanac.com/ninth-scientist-with-ties-to-us-space-and-nuclear-secrets-dead-under-unexplained-circumstances/ America First Report: https://americafirstreport.com/high-profile-scientists-keep-winding-up-dead-or-missing-gop-rep-suggests-there-may-be-a-conspiracy-at-play/ WION: https://www.wionews.com/trending/mystery-around-dead-or-missing-scientists-privy-to-space-and-nuclear-secrets-grows-1775640365360 National Insiders: https://www.nationalinsiders.com/key-scientists-go-missing-what-is-happening/ OAN: https://www.oann.com/newsroom/ninth-scientist-added-to-growing-list-of-nasa-linked-deaths-and-disappearances/
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