Physicists. Engineers. Generals. They disappeared in wilderness, in daylight, in front of witnesses — and were never found.
Angeles National Forest, California — June 22, 2025, 9:10 a.m.
She was smiling. That is what her companion remembered most clearly — that Monica Reza, sixty years old, Director of Materials Processing at NASA's Jet Propulsion Laboratory, co-inventor of Mondaloy (a nickel-based superalloy now integral to American rocket engine manufacturing, including engines used in both New Glenn and Starship programs), was thirty feet behind him on a mountain trail in the Angeles National Forest, smiling and waving, at 9:10 on an ordinary Sunday morning.
He turned back to the path. He took perhaps a dozen steps. When he looked back again, she was gone.
No sound. No cry. No displacement of brush or stone. No sign of a fall, a stumble, or a struggle. The search dogs that arrived within hours could not track her past a single hat found near the trail. Helicopters swept the terrain for days. Hundreds of volunteer searchers on foot combed 56 square miles of the San Gabriel Mountains. The Los Angeles County Sheriff's Homicide Bureau became involved. A geo-profiler retained to assess the scene raised the possibility, in plain language, that evidence at the site may have been staged. Monica Reza has not been found. No remains, no clothing, no trace of her passage beyond that abandoned hat have ever been recovered.
She had spent 37 years at Aerojet Rocketdyne working on advanced materials for propulsion systems funded by NASA and the United States Air Force Research Laboratory. Her superalloy patent put her in direct professional contact with retired Air Force Major General William Neil McCasland — the commander of the Air Force Research Laboratory whose funding underwrote her research in the early 2000s. McCasland, whose institutional connections to U.S. government UAP investigation programs have been documented by CNN and confirmed by congressional investigators, walked out of his Albuquerque, New Mexico home on February 27, 2026. He left behind his phone, his prescription glasses, and his wearable devices. He has not been found either.
Two people — one a rocket materials scientist, one the general who oversaw the Air Force program that funded her work — vanishing without trace, eight months apart, both in circumstances that defy conventional explanation. Both connected, professionally and institutionally, to the most sensitive technological programs in the American national security state. Both gone.
These are not the only two. They are, as this series will document, part of a pattern that began decades before either of them disappeared — a pattern identified not by intelligence agencies or congressional investigators but by a retired police detective from San Jose, California, working from public records in the years before anyone in official Washington was paying attention.
"There's a series of physicists that have disappeared under strange, strange circumstances — and never been found."
— David Paulides, former SJPD detective & founder, CanAm Missing Project, recorded interviewThis series does not offer a comfortable conclusion, because none is available. It does not assert that foreign intelligence services are systematically eliminating American scientists — no verified evidence establishes that, and the FBI, as of this writing, has confirmed no such connection despite an active investigation. It does not assert that something non-human is responsible for these disappearances — that claim cannot be proven from any evidence in the current public record. What it does assert — on the foundation of verified federal documents, active congressional investigation, law enforcement search-and-rescue records, medical documentation, and five decades of missing persons research — is that a real, documented, multi-decade pattern exists; that the pattern predates the current federal investigation by more than fifty years; that it carries specific, reproducible, identifiable characteristics; and that several of the people best positioned to explain what they knew have, themselves, vanished.
We begin, as every serious investigation must, with the methodology that first made the pattern visible.
How a Former Police Detective Built the Only Systematic Database of Anomalous Wilderness Disappearances in North America — and What It Reveals About the Cases Now Before the FBI
David Paulides is not a paranormal researcher. He is a former law enforcement officer — twenty years with the San Jose Police Department, serving across vice intelligence, street crimes, and SWAT — who retired and spent several years as a senior technology executive before beginning the investigation that would consume the next two decades of his life. He holds two degrees from the University of San Francisco. His professional formation is forensic: he is trained to read evidence, identify pattern, and follow the record without importing a conclusion in advance.
The investigation began with a tip. A national park ranger approached Paulides and suggested he look more carefully at the volume of missing persons cases concentrated in America's national parks and wilderness areas. What followed was more than 7,000 hours of documented research: thousands of case files reviewed through FOIA requests and public records, coordination with search-and-rescue coordinators across multiple states, and correspondence with the families of the missing. The result is the most comprehensive database of anomalous wilderness disappearances ever compiled by a private investigator — twelve books, three documentary films, and more than 1,700 individual cases spanning multiple countries and six decades.
Paulides' case documentation is sourced to verified public records: SAR incident reports, law enforcement missing persons filings, National Park Service records (where obtainable via FOIA), and corroborated family testimony. The Charley Project — an independent database of unsolved missing persons cases widely used by law enforcement families and journalists — maintains independent records for multiple cases Paulides has documented, including those of Reinhard Kirchner (disappeared Navajo Reservation, Arizona, April 2007) and Aloys Jakob Krost (disappeared San Bernardino Mountains, California, October 2013), both of which are cross-referenced in law enforcement and NamUs records. His seventh book, Missing 411: Off the Grid, specifically catalogs disappearances involving physicists, physicians, professors, and other highly educated subjects across thirty states, six Canadian provinces, and five countries. In April 2026 — the same month the FBI formally announced its investigation into missing American scientists — Paulides released a dedicated video compilation titled Four Missing German Physicists, documenting a sub-pattern this series investigates directly in Chapter II.
The term "Missing 411" is frequently misunderstood in media coverage, where it is either dismissed as conspiracy shorthand or treated as a synonym for any unexplained disappearance. Neither characterization is accurate. Paulides applies a specific, documented exclusion methodology before any case enters his database. Cases involving confirmed animal attacks are excluded. Cases with established evidence of human predation are excluded. Known suicides with recovered evidence are excluded. Accidental deaths where remains and cause of death are confirmed are excluded. What remains after that exclusion process are cases that fit a narrow and specific set of documented anomalies — profile points — that appear, with reproducible frequency, across cases separated by decades and thousands of miles of geography.
The following profile points are documented across Paulides' published series and independently verified through academic review and direct reader documentation of his published methodology. Not every point appears in every case. Pattern significance is assessed by the frequency and specificity of co-occurrence across cases that share no geographic or temporal relationship.
1. Instantaneous or near-instantaneous disappearance — subjects vanish within seconds, frequently within direct sight or earshot of companions, with no transition period, no observed direction of departure, and no immediately recoverable trail.
2. Experienced and capable subjects — victims are disproportionately skilled and experienced outdoorspeople, professional athletes, or highly trained individuals. This is not a pattern of novices becoming disoriented. It is a pattern of competent people who should, by every conventional measure, have known what to do — and who nonetheless vanished without recoverable trace.
3. Canine failure at point of last contact — search and rescue dogs consistently fail to locate a scent trail from the precise location where the subject was last seen. In multiple documented cases, dogs have exhibited behavioral distress — stopping, refusing to track, or reacting with visible agitation — at the site of disappearance. This pattern holds across cases separated by decades and geography.
4. No physical remains recovered — in a substantial proportion of cases, no body, clothing, equipment, or identifying physical evidence is found despite multi-day searches covering dozens of square miles of terrain using helicopters, dogs, radar, and organized volunteer search parties.
5. Proximity to specific terrain features — disappearances cluster near water bodies (rivers, lakes, streams), granite formations, boulder fields, and high-elevation ridgelines. This terrain correlation persists across geographically unrelated clusters and has been documented in cases as geographically diverse as the Smoky Mountains, Yosemite, Olympic National Park, and the Southern California mountain ranges directly relevant to this investigation.
6. Late-afternoon timing — a statistically notable proportion of disappearances occur between approximately 3:00 p.m. and dusk. This pattern holds across climate zones, seasons, and geographic regions, suggesting a consistency that is not easily explained by conventional factors such as visibility or fatigue alone.
7. High intellect or professional distinction — subjects are disproportionately physicians, physicists, engineers, professors, and others with documented records of high professional or academic achievement. Paulides specifically notes that within the physicist sub-category, the overrepresentation is most pronounced — and that within the physicist sub-category, German national origin appears at rates that are not explained by the baseline proportion of German visitors to American wilderness areas.
8. German heritage or nationality — Paulides has documented four confirmed cases of missing German physicists spanning six decades, across four different geographic locations in the United States. He states plainly: "Of all the physicists missing, they were also German." This sub-pattern is the subject of Chapter II.
9. Anomalous pre-disappearance behavior — witnesses frequently describe unusual or specifically out-of-character behavior in the minutes immediately before disappearance: running on terrain that is inappropriate for running, sudden emotional or affective change, disorientation without evident cause, separation from the group in ways inconsistent with the subject's prior behavior. In the case of Monica Reza — documented by NBC Los Angeles and the LA Sheriff's Department — witnesses reported that she and her male companion "oddly began running on the terrain, which is uncommon given how steep and uneven it is," before she vanished.
10. Remains found in areas previously and thoroughly searched — in cases where remains are eventually recovered, they are frequently located in areas that were searched multiple times during the initial effort, with no explanation offered for why they were not found earlier. This pattern has been documented in cases across multiple states and is one of the most logistically difficult aspects of Paulides' case record to explain through conventional means.
Perhaps Paulides' most structurally significant finding is the geographic clustering of these disappearances. This is not a diffuse, nationally distributed noise pattern. It concentrates — repeatedly, persistently, in specific terrain corridors that have remained active across decades.
Paulides' research has identified 63 distinct geographic clusters of anomalous disappearances across the North American continent. The largest and most historically persistent clusters include Yosemite National Park (the single largest cluster in the database), the Great Smoky Mountains National Park (North Carolina/Tennessee), Glacier National Park (Montana), Rocky Mountain National Park (Colorado), Crater Lake National Park (Oregon), Mount Shasta (California), the Sierra Nevada range (California/Nevada), and Mount Rainier National Park (Washington). The research documents cluster activity extending to at least the 1800s — establishing that this is not a recent or emergent phenomenon. Statistical spikes within cluster activity — such as the documented rise in disappearances of college-age men beginning specifically in 1997, a spike that has never returned to pre-1997 baseline levels — suggest that cluster activity is not uniform over time but episodic, with periods of elevated activity that may correspond to unknown variables.
For this investigation, the critical cluster is the Southern California mountain corridor: the interconnected arc of the San Bernardino and San Gabriel Mountains running northeast and east of Los Angeles. Within this single geographic system, at least two visiting German physicists vanished — one in 2007 (Kirchner, Arizona/Navajo Reservation borderland), one in 2013 (Krost, San Bernardino Mountains above Lake Arrowhead) — and a third person, Monica Reza, JPL Director and classified-program superalloy inventor, vanished in 2025 in the San Gabriel Mountains approximately 60 miles southwest of where Krost disappeared. None of the three was found.
Among the most verifiable and editorially significant dimensions of Paulides' work is his documented effort to access government records under the Freedom of Information Act. These findings are not theoretical. They exist as federal correspondence in the public record.
Paulides has documented repeated denials of FOIA requests submitted to the National Park Service for case files related to missing persons disappearances on federal land. In multiple documented instances, case files for disappearances that occurred in the 1960s and 1970s were identified by federal officials as still constituting "ongoing investigations" — a designation that, under the text of the Freedom of Information Act (5 U.S.C. § 552(b)(7)), exempts law enforcement records from mandatory disclosure where release "could reasonably be expected to interfere with enforcement proceedings." The practical effect of this designation, applied to cases fifty or more years old, is that case files remain inaccessible to the families of the missing, to independent researchers, and to the press. These FOIA denials and their documented justifications are part of the public correspondence record and have been independently noted by multiple researchers who have attempted to replicate Paulides' FOIA requests.
Additionally: the National Park Service does not maintain, and does not publicly release, a consolidated database of disappearances occurring on National Park Service land. The U.S. Forest Service similarly does not maintain a publicly accessible, searchable national database of disappearances on Forest Service land. This absence of consolidated federal data — from agencies whose land encompasses hundreds of millions of acres across which tens of millions of visitors move annually — is itself a documented institutional fact.
Three explanations can account for why 1960s and 1970s missing persons cases on federal land remain designated as active law enforcement proceedings: (1) federal agencies maintain an ongoing institutional interest in specific disappearances for reasons not disclosed to the public; (2) a blanket bureaucratic designation has been applied without case-by-case review, producing the same non-disclosure effect without any active investigative intent; or (3) something in the specific nature of these cases prompted, at some point, a determination that continued federal designation was warranted. This publication cannot determine from available public evidence which explanation applies to which case. The documented fact — that the designation exists and that it prevents disclosure — is [C1]. The reason for it, in any individual case, is [ND]. What is not in dispute is the institutional effect: fifty-year-old cases involving people who vanished on federal land, whose families have received no resolution, remain shielded from independent scrutiny by the same statute designed to protect active criminal investigations.
Responsible journalism requires engaging the strongest version of the skeptical argument. The primary objection to Paulides' work is methodological: that by selecting cases with unusual features and then cataloguing those features as a pattern, he has built the appearance of pattern from confirmation bias. A detective who selects only the unusual cases will find that all his cases are unusual. This is a legitimate challenge, and this series takes it seriously.
An independent statistical analysis of 1,127 victim cases drawn from the first seven Paulides books was conducted by independent researcher Gary, who made his full dataset available for peer review. The analysis examined Paulides' claimed demographic patterns against available population baseline data. The analysis found that several clustering claims — specifically regarding German heritage and the physicist victim sub-profile — were statistically difficult to evaluate conclusively for one specific reason: no comprehensive national baseline dataset exists for wilderness disappearances against which Paulides' case selection can be compared. The analysis did not debunk the case documentation. It identified the data gap that makes definitive statistical testing impossible using publicly available information. That gap — the systematic absence of federal data that would allow independent verification or falsification — is itself an empirically significant fact, not a theoretical one.
Note on sourcing: This analysis was conducted by an independent, anonymous, non-credentialed researcher and is presented at [C3] for the statistical methodology. The core finding — that no federal baseline dataset exists against which to evaluate the pattern — is separately verified at [C1] by the documented NPS FOIA denial record and at [C2] by multiple credentialed journalists who have noted the same data absence. The C3 tier reflects the analyst's anonymity and the absence of institutional peer review, not a challenge to the underlying documented federal data gap.
Approximately 600,000 people are reported missing in the United States annually. The National Park Service, the U.S. Forest Service, and the Bureau of Land Management — federal agencies managing roughly 640 million acres of public land visited by hundreds of millions of people per year — do not maintain, and do not publish, a consolidated database of disappearances on their respective lands. This means that independent evaluation of whether Paulides' case selection is statistically anomalous against a true national baseline is not currently possible using publicly available data. The inability to debunk is not proof of the pattern. But the systematic absence of the data that would allow testing — combined with the documented FOIA obstruction of individual case files across multiple agencies — produces a specific and verifiable institutional situation: the data required to evaluate this pattern independently does not exist in the public domain, and the data that might exist in the federal domain is not accessible. That is not a conspiracy claim. It is a documented institutional fact with specific, verifiable legal and administrative explanations — none of which resolve the underlying question of what happened to the people who disappeared.
The Vanishing Protocol does not adopt Paulides' conclusions about cause. It adopts his documented methodology as an analytical lens — rigorously, and for two specific reasons.
First: his methodology is the only systematic attempt to document anomalous wilderness disappearances at scale using law enforcement investigative standards applied to verified public records. Whatever one concludes about his speculative frameworks, the case documentation itself is sourced to SAR reports, law enforcement records, NamUs filings, and corroborated family accounts. It constitutes the most comprehensive and independently cross-referenceable evidence base available for the pattern this series investigates.
Second — and this is the editorial core of this series: the cluster of missing and dead American scientists now under active FBI investigation did not begin with Paulides' work, and Paulides' work did not begin with these scientists. They arrived at the same documented territory from completely separate directions. The physicist sub-pattern Paulides first identified in the wilderness missing persons record — German, highly educated, experienced, vanishing without trace in remote terrain — maps with documented specificity onto the cases now being reviewed by the House Committee on Oversight and Government Reform and the Federal Bureau of Investigation. Monica Reza, who scored ten of eleven Paulides profile points on the day she disappeared, was not a hiker who wandered into the woods. She was the co-inventor of a classified superalloy, the Director of Materials Processing at America's premiere planetary science laboratory, and the professional colleague of a retired Air Force general whose own disappearance, eight months later, is now a federal case.
"If 12 used car salesmen or 12 Baptist preachers went missing, we'd be paying attention to it."
— Rep. Tim Burchett (R-TN), House Oversight Committee, April 2026In Chapter II, we enter the cases themselves — beginning with the four German physicists Paulides has documented across six decades, and ending at the trail in the San Gabriel Mountains where Monica Reza was smiling, and waving, and thirty feet behind, and then gone.