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Federal probes launched amid online speculation
Federal investigators and the US House Oversight Committee have opened inquiries into the deaths and disappearances of at least 10 individuals connected to sensitive US research facilities. Online sleuths have suggested the cases may be linked, despite official explanations and family objections.
Astronomer's killing tied to local dispute
Carl Grillmair, a 67-year-old astronomer at Caltech's IPAC science center, was fatally shot at his Llano, California, home in February. His alleged killer, 29-year-old Freddy Snyder, faces murder and burglary charges. Authorities have not identified a broader motive.
Grillmair's widow, Louise, attributes the attack to a misguided revenge plot. She said a man later identified as Snyder had trespassed on their property months earlier, claiming to hunt coyotes. When Grillmair directed him to a nearby ridge, Snyder allegedly blamed him for a 911 call placed by a neighbor. Snyder returned with a baseball bat two weeks before the killing but left without incident, Louise said.
"He would laugh at the conspiracy theories. Carl was probably the nicest guy that walked the face of the Earth."
Louise Grillmair, widow
Families dismiss theories as harmful
Relatives of the deceased have publicly rejected claims of a pattern. Susan McCasland Wilkerson, wife of retired Air Force General William Neil McCasland, addressed speculation on Facebook after his February disappearance from their New Mexico home. She noted his recent anxiety, memory loss, and statements about not wanting to live with deteriorating health.
McCasland, who consulted for UFO research group To The Stars, had no current access to classified programs, his wife said. She mocked theories about extraterrestrial involvement: "No sightings of a mothership hovering above the Sandia Mountains have been reported."
Melissa Casias, an administrative assistant at Los Alamos National Laboratory, vanished in Taos in June 2025. Her husband's Facebook post suggested she left voluntarily, but online theorists continued to speculate.
Debunkers cite statistical likelihood
Science writer Mick West argued that the 10 cases fit expected mortality rates among the 700,000 US workers with top-secret clearances. Over 22 months, he calculated 4,000 deaths, including 70 homicides and 180 suicides, would occur statistically. "The deaths are real. The families' grief is real. The pattern is not," he wrote.
Other cases had clear explanations. An MIT physicist was killed by a former classmate who confessed to additional murders. A researcher's body was found in a lake after he lost both parents within hours. A coroner attributed another death to cardiovascular disease.
Grief compounded by online harassment
Louise Grillmair said conspiracy theorists have contacted her for comment, dismissing their claims as "disgusting" and "denigrating to their memories." Other families declined to speak publicly to avoid amplifying the theories.
Grillmair's obituary highlighted his passion for astronomy, flying, and outdoor work. His widow described him as morally principled: "He helped everyone that needed help... He walked the talk."
