New Mexico authorities have identified remains discovered in a national forest as Melissa Casias, a 53-year-old nuclear laboratory employee who vanished in June 2025. State police announced the identification over the weekend, more than eleven months after she went missing.
A hiker found Casias's remains in the McGaffey Ridge area of Carson National Forest on May 28, 2026. A handgun was located alongside the remains, according to investigators. The state medical examiner's office is still working to determine her cause and manner of death.
Casias worked at Los Alamos National Laboratory, which maintains the U.S. nuclear weapons stockpile. On the morning of June 26, 2025, her husband Mark dropped her off at the facility before she unexpectedly returned home. Their daughter Sierra said her mother arrived around 7:45 a.m. claiming she had forgotten her badge, though Mark noted Melissa would have needed to show her badge to enter the lab.
After returning home, Melissa told her daughter she would either work remotely or call out for the day. Later that afternoon, between 12:50 p.m. and 12:57 p.m., she briefly visited Sierra at her workplace to deliver a sandwich. Sierra said her mother's demeanor was normal, perhaps slightly quieter than usual but nothing alarming.
The last confirmed sighting came at approximately 2:18 p.m. when an acquaintance saw Melissa walking eastbound along New Mexico state highway 518 near the small community of Talpa. When she failed to return a family vehicle by 11 a.m. as promised, Mark initially assumed she was caught up with work until her supervisor called to say Melissa had never arrived at the laboratory.
Investigators discovered that Melissa's purse, phones that had been factory reset, and other belongings remained inside her home. Her remains were ultimately found about six miles from her residence in an area that had previously been searched.
Casias's disappearance gained wider attention as part of a broader pattern involving roughly a dozen scientists and researchers connected to space, defense, and nuclear work who either died or went missing in recent months. Though many of those cases have straightforward explanations, the cluster collectively sparked conspiracy theories online and drew the attention of Congress. Former President Donald Trump even called for a federal investigation, describing the situation as serious.
The investigation into Casias's disappearance remains ongoing. Her family released a statement saying they would continue pursuing answers and seeking justice, describing themselves as processing heavy hearts at the discovery.
Author James Rodriguez: "The handgun and the circumstances surrounding her movements that day will likely become central to understanding what happened, but investigators still have significant work ahead."
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