A report in the British newspaper "Daily Mail" stated that the circle of mystery surrounding the series of deaths and disappearances that have affected scientists and employees in American biological laboratories is alarmingly widening.
The report announced the death of scientist Frank Mayold , a prominent NASA researcher, at the age of 61 in Los Angeles on July 4, 2024. Mayold had been an important member of the Jet Propulsion Laboratory (JPL) since 1999, contributing to advanced satellite technology projects, and 13 months before his death, he led a team that achieved breakthroughs that could help in discovering signs of life on planets and moons such as Europa, Enceladus, and the dwarf planet Ceres.
Despite being named a "Principal Investigator" in recognition of his contributions, NASA declined to comment on his death. The public record only posted an online obituary without mentioning any prior illness, and no autopsy was performed.
In a related development, a series of mysterious disappearances and deaths have occurred at sensitive US laboratories since July 2024. In May 2025, Anthony Chavez , a former employee at Los Alamos National Laboratory, vanished without a trace, leaving his personal belongings at home. Two months later, Melissa Casillas , an administrative employee with security clearance to access sensitive information, disappeared from her home, leaving behind her phones and wallet.
Four days before Casillas disappeared, Monica Reza , the director of JPL's Materials Processing Group, disappeared while out with friends. Her disappearance coincided with the disappearance of retired General William Neale Macasland , who was overseeing the development of a revolutionary missile metal, leaving behind only his personal belongings and his gun.
These incidents follow a recurring pattern involving the leaving behind of basic personal items such as phones and wallets, prompting former FBI experts to warn that these employees may be targeted by foreign intelligence agencies.
Just four days before Melissa Casillas disappeared, Monica Rezza, director of the Materials Processing Group at the Jet Propulsion Laboratory (JPL), also vanished while hiking with friends in California's Angeles National Forest. Rezza was not only a colleague of the late scientist Frank Mayold at the same lab, but she also had a direct working relationship with another missing person, retired Air Force General William Neale Macasland, who had been overseeing her work on developing a revolutionary metal used in rockets and their engines.
General Macasland, who allegedly possessed highly classified knowledge about nuclear weapons and unidentified flying objects, was last seen on February 27, 2026, leaving his New Mexico home carrying only a pair of shoes and a pistol, leaving behind his phone, smart devices, and glasses, in a disappearance pattern almost identical to what happened with Chavez and Casillas.
The United States has also witnessed another series of mysterious deaths of prominent scientists:
Carl Grillmayer (67), an astrophysicist associated with NASA and JPL, was shot dead on the porch of his home on February 16, 2026.
Nuno Loureiro , a physicist in Massachusetts, was shot dead while working on nuclear fusion research.
Jason Thomas , a pharmaceutical researcher at Novartis, was found dead in Wakefield Lake after being missing for three months.
Tennessee State Representative Tim Burchett warned that these mysterious cases are not limited to missing persons, but include a series of deaths and crimes that have recently affected the American scientific elite, calling for scrutiny and investigation into the matter.
