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Monday, June 1, 2026

Mystery of missing scientists deepens as body of Los Alamos nuclear lab worker found near gun

 The body of a missing nuclear lab worker has been found — alongside a gun — almost a year after she vanished without a trace, the latest in a string of disappearances and bizarre deaths involving experts and government employees working at some of the most secretive US national security facilities.

The remains of Melissa Casias, 54, who worked at the Los Alamos National Laboratory in New Mexico, were found in Carson National Forest over the weekend, some six miles from where she was last seen alive on June 26, 2025.

She was positively identified by New Mexico State Police on Monday.

The remains of Melissa Casias, 54, were positively identified on Monday.Find Melissa Mondragon Casias

A handgun was found alongside her body in the McGaffey Ridge area, although her exact cause of death and the date she is believed to have died have not yet been determined by authorities.

Her body was discovered by a hiker in an area where US Forest Service crews have been working regularly on a restoration project since December.

Casias worked as an administrative assistant at the lab, created during World War II for the famous Manhattan Project, and closely tied to US nuclear weapons research ever since.

On the day she disappeared, the married mother wiped all records from her phones before leaving them and her identification behind and walking out of her home in Ranchos de Taos, a remote community some 70 miles northeast of Santa Fe.

She dropped her husband, Mark, another Los Alamos employee, off at the facility before allegedly claiming she had forgotten her badge and had to return home.

Her remains were found some six miles from where she was last seen alive on June 26, 2025.GoFundMe

The couple’s daughter, Sierra, told investigators that Casias dropped her off a sandwich and told her she planned to work from home after forgetting her badge.

Surveillance cameras last showed her walking alone eastward on State Road 518, some three miles from her home, at around 2:20 p.m. local time.

It is unclear if Casias owned a handgun, and New Mexico State Police are still examining the scene and tracing the gun’s origins.

Casias is one of four people who have gone missing or died suddenly in recent years with links to US defense and nuclear programs.

They include former Los Alamos employee Anthony Chavez, 79, who vanished without a trace after leaving his home on foot on May 4, 2025, just seven weeks before Casias.

Steven Garcia, a government contractor working for a major facility in Albuquerque, also disappeared after walking out of his home on Aug. 28, 2025, carrying only a handgun and no identification.

On the day she disappeared, the married mother wiped all records from her phones before leaving them and her identification behind and walking out of her home in Ranchos de Taos.GoFundMe

The string of mysterious deaths and disappearances in recent years began in 2023 with the death of experienced NASA scientist Michael David Hicks, according to officials.

Hick, 59, who worked at the Agency’s Jet Propulsion Laboratory (JPL) for nearly 25 years, died July 30, apparently of natural causes.

However, the following year, two others connected to JPL died or disappeared.

In 2024, space research specialist Frank Maiwald died in Los Angeles at age 61.

Monica Reza, a 60-year-old aerospace engineer who served as the director of the NASA Lab’s Materials Processing Group, disappeared while hiking in a Los Angeles forest in June 2025.

Retired Air Force major general William Neil McCasland hasn’t been seen since leaving his home in Albuquerque on Feb. 27, leaving behind his phone, prescription glasses, and wearable devices. 

The FBI is now involved in the search for McCasland, 68, who was involved in some of the Pentagon’s most advanced aerospace research and once headed up the Air Force Research Laboratory at Wright-Patterson Air Force Base in Ohio.

Melissa Casias was found dead a year after she vanished.GoFundMe

Speculation has been further fueled by the deaths of several acclaimed scientists in recent months.

In December 2025, MIT professor Nuno FG Loureiro was fatally shot at his home near Boston by a gunman who had already killed two students in a shooting on Brown University’s campus in Rhode Island.

The 47-year-old physicist and fusion scientist led MIT’s Plasma Science and Fusion Center, aiming to advance clean energy technology and other valuable research.

In February, California Institute of Technology astrophysicist Carl Grillmair, 67, was fatally shot at his home outside Los Angeles by an unknown killer.

Many of those who disappeared or died had connections to UFO research.

In 2024, former US Air Force intelligence officer Matthew James Sullivan, 39. died suddenly before he could testify in a federal whistleblower case about UFOs, according to Rep. Eric Burlison of Missouri.

His public obituary did not state how he died.

Conspiracy theorists are also re-examining the death in 2022 of 34-year-old Amy Eskridge, who co-founded the Institute for Exotic Science in Huntsville, Alabama.

https://nypost.com/2026/06/01/us-news/body-of-missing-los-alamos-nuclear-lab-worker-found-alongside-gun-in-remote-national-forest-a-year-after-she-vanished/

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