One of multiple missing scientists was found dead May 28 by a hiker in New Mexico’s Carson National Forest, according to authorities.
The hiker discovered the body of a dead woman and a handgun in the McGaffey Ridge area of Carson National Forest, according to a New Mexico State Police (NMSP) press release. The NMSP’s Investigations Bureau was notified of the discovery and opened an investigation. The bureau later identified the woman as Melissa Casias.
Casias worked as an administrative assistant at the Los Alamos National Laboratory, according to her niece, Jazmin McMillen, CBS News reported. Casias was reported missing on June 26, 2025, police said in the release. (RELATED: NASA Scientist From Alabama Went Missing, Died In Fiery 2025 Car Crash)
Casias did not show up to work and also did not return home after visiting her daughter at her job. Casias appeared to have left behind personal belongings, including her cell phones, purse, and identification, prompting her family to report her missing.
At least 10 scientists or staff members who worked in U.S. nuclear or space technology have died or gone missing over the past 33 months. Other missing persons include Steven Garcia, a government contractor who allegedly had a top-level clearance at a nuclear facility, and retired Air Force Maj. Gen. William Neil McCasland. Garcia was reported missing in August 2025, while McCasland apparently went missing on Feb. 27 after leaving his New Mexico home.
In addition, Anthony Chavez, who was also employed at the Los Alamos National Laboratory is missing, according to Fox News. The Federal Bureau of Investigation (FBI) and House Oversight Committee have opened investigations into the purported deaths and disappearances of the group of scientists.
Casias’ family confirmed her death in a statement shared with KRQE.
“We confirm that the remains found in Rio Chiquito are Melissa. There will be more information to come but what we can tell you now is she was located in an area previously searched. This is a lot to process, our hearts are heavy and we fully intend to continue to pursue answers for justice,” the family’s statement read.
Casias’ cause and manner of death have not yet been determined, the NMSP said. The Office of the Medical Investigator will conduct an anthropological exam of her body.
The investigation into Casias’ death remains “active and ongoing,” the NMSP said, according to the release.