Mystery of missing scientists deepen after body of Los Alamos nuclear lab worker found near gun

The remains of Melissa Casias, a 54-year-old administrative assistant at Los Alamos National Laboratory, were discovered in Carson National Forest over the weekend by a hiker. Casias had been missing since June 26, 2025, when she vanished from her home in Ranchos de Taos, New Mexico, leaving behind her phones and identification. Her body was found approximately 10 kilometers from her last known location, near a handgun, though the cause of death and exact time of death remain undetermined. Casias worked at the Los Alamos lab, a facility tied to U.S. nuclear weapons research since the Manhattan Project. On the day she disappeared, she allegedly told her husband, Mark Casias—also a lab employee—that she had forgotten her badge and would return home. Surveillance footage showed her walking alone eastward on State Road 518 around 2:20 PM before vanishing. Authorities are tracing the handgun found near her body and investigating whether she owned it. Her case is the latest in a series of unexplained deaths and disappearances involving experts linked to U.S. defense and nuclear programs. In May 2025, Anthony Chavez, a 79-year-old former Los Alamos employee, vanished without a trace after leaving his home on foot. Steven Garcia, a government contractor in Albuquerque, disappeared in August 2025 while carrying only a handgun and no identification. The pattern began in 2023 with the death of NASA scientist Michael David Hicks, 59, who worked at the Jet Propulsion Laboratory for nearly 25 years. Since then, two other JPL-affiliated individuals—Frank Maiwald, a space research specialist who died in Los Angeles in 2024, and Monica Reza, a 60-year-old aerospace engineer who vanished while hiking in June 2025—have also been linked to the string of incidents. Retired Air Force Major General William Neil McCasland, 68, disappeared in February 2025 after leaving his Albuquerque home without his phone, glasses, or wearable devices. The FBI is now involved in the search for McCasland, who previously headed the Air Force Research Laboratory at Wright-Patterson Air Force Base. Speculation has grown following the December 2025 fatal shooting of MIT professor Nuno FG Loureiro, though authorities have not confirmed any direct connections between these cases. New Mexico State Police continue to examine the scene and trace evidence in Casias’ case, while investigators remain focused on uncovering potential links to classified research or other unexplained factors.