Seven of them were connected to the Air Force Research Laboratory (AFRL) or the institutions it directly funds.

AFRL develops and transitions the most sensitive aerospace technologies in the United States' defense arsenal.

1) Monica Jacinto Reza vanished June 22, 2025 while hiking with friends in the Angeles National Forest in California.

She was last seen waving to a hiking companion approximately 30 feet behind the group. Despite an extensive search involving helicopters, drones, and canine units, only a beanie and lip balm were recovered, and her body was never found.

Reza, 60, was an aerospace engineer and Technical Fellow at Aerojet Rocketdyne who later moved to NASA's Jet Propulsion Laboratory (JPL)and co-inventor of Mondaloy.

Mondaloy is a family of nickel-based superalloys developed by Aerojet Rocketdyne to withstand oxygen-rich environments and extreme heat in rocket engines. Its unique achievement is balancing high oxygen compatibility with structural strength, solving a critical challenge where traditional oxygen-resistant alloys were too weak for use in high-pressure components like preburners and turbine rotors.

She worked closely with Retired Major General William Neil McCasland, who commanded the AFRL from 2011 to 2013 and oversaw the government funding for her alloy program. McCasland disappeared in February.

Dallas Hardwick, Reza's mentor and co-inventor of Mondaloy, died on January 5, 2014, apparently of natural causes.

2) Melissa Casias has been missing since June 26, 2025, in Taos County, New Mexico.

She was last seen walking alone on Highway 518 near Talpa around 2:15 p.m., wearing a light-colored shirt, jeans, and tennis shoes, with a backpack containing personal items.

Casias, 53, was an administrative assistant at the Los Alamos National Laboratory (LANL), a facility known for nuclear weapons research and national security science.

Her job at LANL links her to McCasland, who worked closely with LANL on national security projects at Kirtland Air Force Base, according to the Daily Mail. She vanished just four days after Reza mysteriously disappeared.

3, 4, 5) Jacob Prichard, Jaymee Prichard, and 1st Lt. Jaime Gustitus all died on October 25, 2025.