Hiker Finds Melissa Casias Body in Carson National Forest After Los Alamos Worker Vanished

Human remains found by a hiker in the McGaffey Ridge area of Carson National Forest in New Mexico were identified as those of Melissa Casias, a Los Alamos National Laboratory employee who had been missing for more than a year.

“Remains found in a New Mexico national forest have been identified as those of Melissa Casias, a worker at the Los Alamos National Laboratory who disappeared last year, authorities announced over the weekend”

CBS News

New Mexico State Police said a handgun was located alongside the remains, and the cause and manner of death had not immediately been determined.

CBS News

The Independent reported that the New Mexico Medical Investigator’s Office confirmed the remains were those of 53-year-old Melissa Casias, and said her remains would “undergo further anthropological examination” by the Office of the Medical Investigator.

Casias was reported missing on June 26 after she “failed to arrive at work and did not return home that evening after visiting her daughter at work,” according to state police, and her family said they found she had left behind her purse, ID and cell phones.

In a statement shared via a Facebook page dedicated to her disappearance, her family wrote, “We confirm that the remains found in Rio Chiquito are Melissa.”

State police said Casias was last seen walking eastbound along a state highway on 26 June 2025, and that a hiker discovered her remains in the McGaffey Ridge area of the Carson national forest on 28 May 2026.

CNN reported that the state Office of the Medical Investigator positively identified Casias, but that the cause and manner of death have not yet been determined, and that the remains will undergo further anthropological examination by the Office of the Medical Investigator.

Clarin

In a July 2025 Dateline interview described by The Guardian, Casias’s husband, Mark, said he last saw her at about 6.15am on 26 June and that she planned to travel to another location within the laboratory’s 40-sq-mile campus for a work assignment.

The Guardian also reported that investigators learned Melissa unexpectedly returned to the family’s home in Ranchos de Taos that morning, more than an hour from LANL, and that Mark told Dateline: “You’ve got to show your badge to get in – and … she showed her badge.”

The New York Post said a handgun was found alongside Casias’s body in the McGaffey Ridge area, while authorities had not yet determined her exact cause of death or the date she is believed to have died.

Casias’s case is part of a wider set of disappearances and deaths involving people linked to sensitive U.S. nuclear or space programs, with The Independent saying she was among the 12 Americans with apparent ties to nuclear or space programs who have vanished or died since 2022.

“Human remains discovered by a hiker in a northern New Mexico national forest last week have been identified as Melissa Casias, a Los Alamos National Laboratory employee who disappeared nearly a year ago, authorities said”

CNN

The Guardian said Casias’s case was among about a dozen U.S. scientists linked to space, defense and nuclear research who had either died or disappeared in recent months, and noted that some deaths have been ruled suicides or otherwise clearly explainable.

The Independent reported that Congress and the FBI have both launched investigations into the string of cases, and that when asked last month, President Donald Trump said “hopefully” the disappearances were just a “coincidence.”

Fox News said the House Oversight Committee was investigating “recent unconfirmed public reporting” alleging that people connected to “U.S. nuclear secrets or rocket technology” had died or vanished in recent years.

NewsNation reported that the FBI and federal agencies were reviewing the disappearances and deaths and that conspiracy theories have linked the cases with secret government files on “unidentified anomalous phenomena,” or UAP, the acronym used interchangeably with UFOs.