New Mexico authorities identified human remains discovered by a hiker as those of a missing Los Alamos National Laboratory employee whose case gained attention due to the publicity surrounding a string of deaths and disappearances of U.S. scientists linked to space, defense and nuclear research.
The New Mexico State Police announced on Saturday that the remains belonged to Melissa Casias, a 53-year-old Taos resident who worked as an administrative assistant at the Los Alamos National Laboratory.
“Through coordination with the Office of the Medical Investigator (OMI), the individual has been positively identified as a missing person, Melissa Casias,” the police said in a statement.
“The cause and manner of death have not yet been determined. The remains will undergo further anthropological examination by OMI.”
A hiker had discovered the human remains, now identified as Casias’, in the McGaffey Ridge area of the Carson National Forest on May 28, according to the report. The New Mexico State Police Investigations Bureau was notified about the hiker’s discovery, and investigators also learned that a handgun was found alongside the remains.
The state police began conducting an investigation, which they said on Saturday remains ongoing, after Casias was reported missing on June 26, 2025, when she failed to arrive at work and did not return home that evening after visiting her daughter at work.
Casias’ family became concerned for the woman’s welfare, having noticed that she had not taken her purse, identification and phones with her, the state police said.
Over the weekend, KRQE shared a statement from the woman’s family that confirmed the remains found in Rio Chiquito belonged to their missing relative.
“There will be more information to come, but what we can tell you now is that she was located in an area previously searched,” the family stated. “This is a lot to process, our hearts are heavy, and we fully intend to continue to pursue answers for justice.”
The case of the missing laboratory staffer follows a series of disappearances and deaths involving about a dozen scientists. The missing or deceased individuals’ connections to U.S. nuclear secrets or rocket technology have raised concerns about national security.
House Committee on Oversight and Government Reform Chairman Rep. James Comer, R-Ky., and Subcommittee on Economic Growth, Energy Policy, and Regulatory Affairs Chairman Rep. Eric Burlison, R-Mo., sought answers through an investigation into the missing and deceased scientists.
On April 20, the pair sent letters to Department of Energy Secretary Chris Wright, Department of War Secretary Pete Hegseth, FBI Director Kash Patel and NASA Administrator Jared Isaacman.
The letters cited reports that at least 10 individuals who “had a connection to U.S. nuclear secrets or rocket technology” have “died or mysteriously vanished in recent years.” As Comer and Burlison noted, if the reports are accurate, “these deaths and disappearances may represent a grave threat to U.S. national security and to U.S. personnel with access to scientific secrets.”
“Specifically, public reports raise questions about a possible sinister connection between a string of mysterious deaths and disappearances which began in 2023 with the death of Michael David Hicks, who worked as a scientist at the NASA Jet Propulsion Laboratory (JPL) from 1998 to 2022,” the congressmen explained.
Among the individuals who disappeared recently is Air Force Maj. Gen. William Neil McCasland, who went missing from his home in Albuquerque, New Mexico, in February. McCasland is believed to have left home with a .38 caliber revolver at the time of his disappearance.
McCasland allegedly had a “close professional connection” with Monica Reza, who served as the director of the NASA Lab’s Materials Processing Group, the congressional committee noted. The two were connected through an Air Force-funded research program in the early 2000s on “advanced materials needed for reusable space vehicles and weapons.”
Reza also disappeared while hiking in California in June 2025, according to reports. In addition to scientists associated with NASA JPL, the other missing or deceased individuals include people affiliated with the Los Alamos National Laboratory and an MIT scientist working on nuclear fusion.
Samantha Kamman is a reporter for The Christian Post. She can be reached at: [email protected]. Follow her on Twitter: @Samantha_Kamman
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