The autopsy of missing Los Alamos National Laboratory employee Melissa Casias answered one question about how she died. My reporting on the findings raised many more questions about the recovery of her remains, the investigation surrounding her death, and disturbing concerns being voiced about other women in New Mexico.

For nearly a year, the central question surrounding Melissa Casias was where she had gone. Casias, a 54-year-old employee of Los Alamos National Laboratory, disappeared in northern New Mexico in June 2025 after failing to arrive for work. Her case attracted attention not only because of her unexplained disappearance, but also because of where she worked and the circumstances surrounding her final known movements.

Then, on May 28, 2026, a hiker made the discovery her family had dreaded: skeletal remains on McGaffey Ridge in Taos County. The hiker had reportedly stopped to enjoy the view when the remains were noticed on a rocky outcrop. The following day, a recovery team made the difficult trek to the site.

I have been reporting on the Casias case through All Things Unexplained, including the eventual release of the findings from her autopsy and forensic anthropological examination. Those records provide a far more detailed—and in several respects more troubling—picture of the location where Melissa was found. According to the report I reviewed, reaching the recovery area required traveling approximately 1.6 miles from the staging point, a journey that took the recovery group more than two hours.

There were no trails. The route crossed steep inclines, loose rock, soil and trees. That description immediately raised an important question because Melissa’s family had previously said that the general area had been searched. Was the precise rocky outcrop actually searched earlier, or had searchers merely been somewhere in the surrounding area? The distinction could be enormously important.

The condition and position of the remains added another layer of complexity. The report described the skeletal remains as leaning back against stone in a depression among rocks. Melissa’s left tibia, fibula, shoe and sock were approximately 20 feet away. A firearm was found near the body. The left hand and left foot were absent, and investigators observed evidence of animal predation. Melissa was positively identified through comparison of antemortem and postmortem dental imaging.

The autopsy established a crucial fact: Melissa sustained projectile trauma to the cranium around the time of death. The projectile entered the cranial base from the right, traveling from right to left, inferior to superior, and slightly posterior to anterior before exiting through the left side of the skull. The examination found no evidence of antemortem skeletal trauma, although the report cautioned that additional injuries to soft tissue could have existed without leaving evidence on the bones.

The medical findings therefore provided an answer, but only a partial one. Melissa suffered a gunshot wound to the head. They did not establish the circumstances under which that gunshot occurred. Her manner of death remained undetermined, leaving unresolved the most important question of all: did Melissa take her own life, or was someone else involved? As I said when reporting the results, the autopsy seemed to deepen the mystery rather than resolve it.

There was another significant development surrounding the firearm. In my August reporting, I discussed information reported by Crime Junkie, which said it had confirmed with New Mexico State Police that the gun found with Melissa’s remains belonged to her husband, Mark Casias. The available information identified it as a black Springfield, although the exact model and caliber were not then known. That immediately raised another unanswered question: had the firearm ever been reported missing or stolen? At the time of my report, I had no information establishing that it had.

My reporting also examined an apparent discrepancy involving Mark Casias’s account of the morning Melissa disappeared. Early information obtained by investigators initially appeared unable to confirm his account that Melissa had driven him to Los Alamos National Laboratory. More extensive records later resolved that issue. Surveillance ultimately showed Melissa’s Volkswagen arriving at a Los Alamos guard shack at approximately 6:13 a.m., with Melissa driving and Mark believed to be the passenger. The Volkswagen was then recorded leaving Los Alamos property at approximately 6:20 a.m. That evidence corroborated his central account that Melissa drove him to work.

Another detail, however, remained notable. Mark had reportedly initially told investigators that he and Melissa stopped at a gas station in Santa Clara that morning to use the bathroom and purchase a few things. Police reviewed the station’s surveillance footage and determined that the Volkswagen had not been there. According to the search-warrant affidavit discussed in my report, Mark subsequently changed that portion of his account and said they had not stopped there. That discrepancy does not establish wrongdoing, but in an unresolved death it is a detail worthy of accurate documentation rather than speculation.

What I found most disturbing in the autopsy material, however, was not the trajectory of the gunshot or even the questions surrounding the firearm. It was what happened after Melissa’s body was found.

The official recovery did not recover all of Melissa.

The records show that on June 24—nearly a month after the initial recovery—a field deputy medical investigator and a New Mexico State Police agent went to the Albuquerque office of an attorney who had received additional remains from a private investigator. That private search had taken place after the original recovery team left the scene. The attorney was David Adams, who represents Melissa’s family and with whom I subsequently spoke at length.

The chronology becomes even more difficult to comprehend. Melissa’s initial remains were recovered in late May. Additional remains found through a search organized by her family were turned over on June 24. Then, on July 2, forensic anthropologist Dr. Anna Medendorp returned to the site with the field deputy medical investigator and still more remains were recovered. The forensic examination therefore involved remains obtained during three separate recovery efforts spanning more than a month.

The report specifies some of what had been missed. The June 24 material included shafts of Melissa’s left radius and ulna, portions of metacarpals and additional bone fragments. The July 2 recovery included cervical vertebrae and much of the left foot. Even after those searches, the anthropological inventory identified skeletal elements that remained absent, including the mandible and portions of the left hand and foot.

There is an important qualification here. The forensic anthropological examination documented carnivore damage and scavenging on several bones, including portions of the left femur, tibia, fibula, radius and metacarpals. Animal activity provides a plausible explanation for why remains had become dispersed from the primary location; indeed, the initial recovery already found part of the leg approximately 20 feet away. What it does not explain by itself is why a recovery operation at a known human-remains scene ended with recoverable portions of the deceased still present, requiring the family and then a forensic anthropologist to return later.

That issue became still more troubling during my conversation with Adams because it allowed me to correct a detail that had circulated during earlier reporting. One of my sources had told me that Melissa took thyroid medication. Adams confirmed to me that she did. That led to confusion surrounding something orange reportedly discovered at the scene, and I specifically asked Adams whether the object was an orange pill—potentially consistent with medication—or an orange peel.

It was an orange peel.

According to Adams, it had nothing to do with Melissa’s medication. He told me that responders had eaten at the location and left food and trash behind. The orange peel was part of what he regarded as evidence of a lack of respect for the scene and the deceased. In my original reporting, I described Adams’s characterization of the scene in strong terms, particularly when viewed alongside the subsequent discovery that the original recovery had not collected all of Melissa’s remains.

That clarification is important because the orange peel should not become another piece of mythology surrounding an already mysterious case. It was not a mysterious orange peel found beside Melissa’s body, and Adams did not present it to me as evidence that Melissa had recently eaten there. The thyroid-medication information was accurate, but the two details were unrelated. The significance Adams attributed to the peel was much simpler: he believed it illustrated how the scene had been treated.

The autopsy records make that concern difficult to separate from the physical recovery itself. After the May recovery, the family’s private search recovered additional remains in June. A forensic anthropologist returned in July and recovered still more. In my original report, I questioned what potentially useful evidence might now be permanently unavailable as a consequence of the way the location was handled. That remains an open question, not a proven consequence. But when the circumstances of a death cannot be determined, preservation of the scene becomes especially consequential.

There are also forensic questions that the autopsy could not answer. Not all cranial bone was recovered, and the examination noted that additional soft-tissue injuries could have existed without leaving skeletal evidence. My reporting also raised the question of the projectile itself: where was the bullet? The report documented its path through and out of the cranium, but the information I reviewed did not establish that the projectile had been recovered.

None of this proves Melissa was murdered. It is important to repeat that there is a difference between identifying investigative questions and constructing a theory to answer them. The medical examiner did not classify Melissa’s death as homicide. But neither was it classified as suicide. The official determination was undetermined, and the physical limitations documented in the examination mean there are questions forensic science may no longer be capable of resolving.

My conversation with Adams then took the story somewhere I had not originally expected it to go. He told me that people in the area believe something troubling is happening to local Indigenous women and that there is a perception among locals that law enforcement does not always take these cases seriously enough. Against the backdrop of what I had just read in Melissa’s autopsy—the food and trash Adams said responders left behind, the repeated returns for additional remains, and the incomplete skeletal recovery—it was difficult for me to dismiss what he was describing. In my original report, I specifically connected Adams’s comments about local distrust to what the autopsy documents revealed about the recovery.

Adams then urged me to investigate another woman whose family he represents: Lynelle Tafoya, a 34-year-old Jemez Pueblo mother of four who disappeared in 2021. More than a week after she vanished, her body was found in a ditch or ravine near Interstate 40 in Bernalillo. The circumstances were startling. According to the police information reviewed in the reporting I subsequently presented, her pants were down around her ankles, her cellphone was located roughly 500 yards away, and her backpack was found farther down a trail on Santa Ana Pueblo property. Yet the responding officer wrote that no signs of foul play had been observed or reported, and the matter was filed as an unattended death.

Tafoya’s family believes that decision crippled the investigation before it truly began. Adams has argued that the circumstances warranted a homicide investigation and that potentially important evidence was mishandled or destroyed. Tafoya’s mother said her daughter’s cellphone and backpack were returned to her when she believed investigators should have been examining them for clues. She later provided the phone to another police agency, but according to the reporting, its contents were destroyed in that process. Adams described the case as a “jurisdictional nightmare,” involving tribal authorities, local police, the Bureau of Indian Affairs and other agencies.

The medical findings in Tafoya’s case did not provide a definitive answer either. Her medical examiner described possible causes of death as including methamphetamine toxicity, drowning or some combination of the two, while the official manner remained undetermined. Adams nevertheless pointed to an extraordinary autopsy finding that he believed should have prompted greater scrutiny: the ends of Tafoya’s fingers were missing.

It is tempting to place that detail beside Melissa’s missing left hand and foot and draw a line between the two cases. I will not do that. Melissa’s remains showed documented evidence of animal scavenging, and there is currently no publicly established forensic evidence connecting her death to Tafoya’s. Similarities are not connections, and unresolved cases should not be forced together merely because doing so creates a more compelling mystery.

What makes the Tafoya case relevant to my reporting is something much more concrete: David Adams himself pointed me toward it. He represents both families and told me that locals believe unusual things are happening in the area and that the problem goes deeper than outsiders realize. My reporting also noted the juxtaposition that Tafoya was found with portions of her fingers missing while Melissa’s remains initially lacked an entire left hand and foot. That observation is worthy of further investigation; it is not evidence that the same person was responsible.

There is also a darker rumor circulating locally. Adams told me of rumblings about the possibility of a serial killer. That allegation requires the strongest possible qualification: I have seen no evidence establishing that a serial killer killed Melissa Casias, no law-enforcement agency has publicly connected her death with Tafoya’s, and the existence of local rumors is not evidence of a serial offender. Melissa’s death has not even been officially classified as a homicide.

But reporting that this fear exists is different from endorsing it. When an attorney representing two families directs attention toward what he believes are troubling investigative failures, residents believe Indigenous women are disappearing or dying without adequate scrutiny. When those concerns exist within a documented Missing and Murdered Indigenous People crisis, the responsible journalistic question is not “Is there definitely a serial killer?”

It is: why have people in these communities become frightened enough to believe there might be one?

New Mexico’s history makes that fear particularly difficult to separate from the state’s unresolved past. In 2009, investigators began uncovering the remains of women buried on Albuquerque’s West Mesa. Eleven women and an unborn child were ultimately recovered, and the murders remain one of the state’s most notorious unsolved cases. There is no evidence connecting the West Mesa murders to Melissa Casias, Lynelle Tafoya or any current case and suggesting otherwise would go beyond the evidence. But the history illustrates why fears about missing women, inadequate investigations and the possibility of predatory offenders have such resonance in New Mexico.

There is also the much larger crisis involving missing and murdered Indigenous women. Tafoya’s case sits directly within that context. The federal government has established programs specifically intended to address jurisdictional gaps and improve cooperation between federal, tribal and local authorities. In the reporting I presented, a Missing and Murdered Indigenous Persons coordinator with the U.S. Attorney’s Office acknowledged the importance of getting different agencies to cooperate and communicate, particularly when lost physical evidence forces investigators to rely more heavily on witnesses and circumstantial evidence.

Melissa Casias’s case is not identical to those cases, and her employment at Los Alamos National Laboratory creates its own irresistible atmosphere of speculation. Los Alamos is inseparable in the American imagination from secrecy, nuclear weapons and classified research. Yet nothing in the autopsy I reported establishes that Melissa’s work at the laboratory caused her disappearance or death. The evidence instead directs us toward less exotic but equally serious questions: what happened after she left Los Alamos that morning, how she reached the remote location where she was eventually discovered, whether that precise location had actually been searched before, when she arrived there, and whether anyone else was involved.

The autopsy also forces questions about what happened after Melissa was found. Why did a family-organized search recover additional remains nearly a month after the official recovery? Why did a forensic anthropologist subsequently return and find still more? Why were portions of Melissa’s skeleton never recovered? What evidence, if any, disappeared before the location was fully examined? Where was the projectile that passed through her skull? And if authorities cannot determine whether her death was homicide or suicide, how much more might have been learned had every recoverable piece of evidence been preserved from the beginning? These questions should not be mistaken for accusations. Some of the dispersal of Melissa’s remains is consistent with the documented scavenging and predation. Difficult terrain undoubtedly complicated the recovery. The absence of evidence is not evidence of a cover-up, and investigative mistakes, even serious ones, do not establish murder. But those caveats cannot erase what the records themselves show: Melissa’s remains required three separate recovery efforts, including one initiated privately by her family, before investigators had what they ultimately examined.

That may be the most important revelation contained in the autopsy material. The document did more than tell us how Melissa died. It inadvertently provided a chronology of what happened at the location after she was found, and that chronology raises serious questions about the quality of the original recovery. When combined with what Adams told me about the treatment of the scene, his concerns about how cases involving Indigenous women are handled, and the disturbing Tafoya case he specifically urged me to investigate, Melissa’s story becomes part of a much broader conversation.

There is not enough evidence to declare that Melissa was murdered. There is certainly not enough evidence to connect her to a serial killer. There may ultimately be no relationship whatsoever between her death and the other cases troubling residents of New Mexico. But there is more than enough evidence to justify scrutiny of the investigation and to ask whether potentially critical opportunities were lost.

For nearly eleven months, Melissa Casias’s family wanted authorities to answer one question: where is Melissa? They finally received that answer on a rocky mountainside in May 2026. The autopsy gave them another answer—that she died from a gunshot wound to the head—but stopped short of answering the question that matters most. After three trips to recover her remains, an undetermined manner of death, a projectile apparently never recovered, a scene her attorney says was treated without respect, and lingering uncertainty over what happened between Melissa’s disappearance and her discovery, the central mystery has changed, but it has not disappeared.

The question is no longer where Melissa Casias went. It is what happened to her—and whether the investigation that followed left behind some of the evidence needed to ever know for certain.