Remains found. On 28 May 2026, a hiker discovered human remains in the McGaffey Ridge area of Carson National Forest, New Mexico. A handgun was found alongside the remains. New Mexico State Police, in coordination with the Office of the Medical Investigator (OMI), positively identified the remains as Melissa Casias. She had been missing for approximately 11 months.
Location. The discovery site is approximately 6 miles from where Casias was last seen on State Road 518 near Talpa on 26 June 2025, and approximately 15 miles from her home in Taos. The location is at an elevation of approximately 8,600 feet. Casias's family confirmed in a statement that the remains were found "in an area previously searched" — an area where canine and search-and-rescue teams had already spent multiple days searching in difficult conditions described by the SAR unit leader as upper-thigh deep mud.
Cause and manner of death not determined. New Mexico State Police confirmed the cause and manner of death have not yet been determined. The remains will undergo further anthropological examination by the OMI. No ruling — accident, suicide, homicide, or undetermined — has been issued.
The handgun. A handgun was found alongside the remains. Its origin, registration, and whether it belonged to Casias have not been publicly confirmed by authorities.
Family statement. The family posted to the "Find Melissa Mondragon Casias" Facebook page: "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."
Status. This case remains open. No cause of death has been established. No official connection to any other case in this series has been confirmed. The FBI is separately investigating for connections across the broader series of deaths and disappearances.
Who Was Melissa Casias?
Melissa Casias, 53, worked as an administrative employee at Los Alamos National Laboratory and held a top security clearance. Administrative staff at a facility like Los Alamos are not peripheral figures — they handle scheduling, communications, access, and documentation for some of the most sensitive research programs in the United States government. A top clearance at that level of facility implies trusted access to information about classified programs.
Family members described her as a grounded, present person — someone who was actively planning for the near future. In particular, she had been making arrangements to care for her mother during an upcoming surgery. This, her family repeatedly emphasised, is not the behaviour of someone preparing to disappear.
The Circumstances of Her Disappearance
On 26 June 2025, Casias was last seen in Taos County, New Mexico, walking south along State Road 518 from Talpa after she dropped off lunch for her daughter — ordinary, mundane behaviour with no indication anything was wrong. She failed to return home or report to work and was reported missing the same day.
When family members returned home, they found her car, purse, and keys inside the residence. Also found were both her personal mobile phone and her work-issued phone. Both phones had been factory reset, wiping all recent data, communications, contacts, and call history. A factory reset of two phones on the day a person vanishes is not a routine occurrence. It is either a deliberate act of digital erasure by the person themselves before leaving — or evidence of interference.
On 28 May 2026 — nearly 11 months after her disappearance — a hiker discovered human remains and a handgun in the McGaffey Ridge area of Carson National Forest, approximately 6 miles from where she was last seen. The remains were positively identified as Melissa Casias by the Office of the Medical Investigator. The cause and manner of death have not yet been determined. The remains will undergo further anthropological examination.
The family confirmed the remains were found in an area that had previously been searched by canine and search-and-rescue teams. The SAR unit leader — with 24 years of experience — described the original search as one of the most difficult she had participated in, with teams walking through upper-thigh deep mud.
The Los Alamos Connection
Casias's disappearance came just eight weeks after her Los Alamos colleague Anthony Chavez disappeared under entirely different but equally unexplained circumstances. Two employees of the same nuclear weapons research laboratory, both from the same region of northern New Mexico, both gone within weeks of each other. Chavez remains missing as of June 2026.
The discovery of Casias's remains does not resolve the questions raised by her disappearance. The phones remained factory-reset. The cause of death remains undetermined. The handgun found alongside her remains has not been publicly accounted for. The family's statement — that they intend to pursue answers for justice — reflects the unresolved nature of the case even with her remains recovered.