The disappearance of a retired Air Force general who once oversaw billions of dollars in military research has drawn federal investigators into the search and fueled a wave of online conspiracy theories about classified programs and unidentified flying objects.
Retired Maj. Gen. William “Neil” McCasland, a former commander of the Air Force Research Laboratory, has been missing since Feb. 27, when he disappeared from his home in Albuquerque, New Mexico. Local authorities are leading the investigation, but federal agencies, including the FBI, have joined the search as the case continues to attract national attention.
While investigators have not identified a clear explanation for his disappearance, McCasland’s background overseeing some of the Air Force’s most advanced science and technology programs has made the case a magnet for speculation online.
Authorities say the investigation remains active and have urged anyone with information to contact law enforcement.
A Career at the Center of Air Force Research
McCasland spent more than three decades in the Air Force and ultimately served as commander of the Air Force Research Laboratory (AFRL), one of the military’s most influential science and technology organizations.
AFRL manages research programs that shape the future of air and space power, including advanced propulsion systems, directed energy weapons, aerospace materials and satellite technologies.
At the time of his leadership, the laboratory oversaw roughly $2.2 billion in Air Force science and technology programs, along with additional externally funded research and development projects.
The role placed McCasland among the Air Force’s most senior science leaders, responsible for guiding long-term research investments and coordinating efforts across the Pentagon, universities and defense industry partners.
Programs developed through AFRL help transition experimental technologies into operational military capabilities used by service members around the world.
During McCasland’s tenure, AFRL played a central role in developing technologies that later became key components of modern U.S. military capability. The laboratory helped advance work on directed-energy weapons, advanced satellite systems, hypersonic research and next-generation sensors, while partnering with universities and defense contractors to transition experimental technologies into operational systems used by the Air Force and Space Force today.
Leaders of AFRL often interact with classified programs and emerging technologies years before they become publicly known, which helps explain why the disappearance of a former commander has drawn unusual attention online.
McCasland retired from the Air Force in 2013 after more than three decades of service.
Federal Authorities Join the Search
Local authorities in Bernalillo County, New Mexico, are leading the investigation, but federal agencies have provided additional resources as the search expanded.
The FBI’s Albuquerque field office has joined the effort to assist with investigative support and search coordination.
Federal agencies often provide specialized resources in missing-person cases, including forensic analysis, digital investigations and coordination across jurisdictions.
Authorities have conducted extensive search operations around Albuquerque, including neighborhood canvassing, drone flights and searches with trained K-9 teams.
Volunteers and neighbors have also assisted with the search effort, helping distribute information and examine areas near McCasland’s home where he might have traveled.
So far, investigators have not publicly identified evidence of foul play.
Timeline of the Day He Disappeared
Some of the clearest details about the day McCasland vanished have come from his wife, Susan McCasland Wilkerson.
According to information she shared publicly, a repairman visited their home around mid-morning on Feb. 27. Wilkerson later left for a doctor’s appointment, and when she returned about an hour later, McCasland was gone (KRQE News, Albuquerque).
Investigators say his phone and glasses were left behind in the house, while several other items were missing, including his wallet, hiking boots and a .38-caliber revolver.
The disappearance prompted authorities to issue a Silver Alert and launch a large search effort across the surrounding area.
Wife Pushes Back on Conspiracy Theories
As the case spread online, Wilkerson has repeatedly pushed back against speculation linking her husband’s disappearance to UFO secrets or classified military programs.
In a public Facebook post addressing the rumors, she wrote that her husband had no secret knowledge about extraterrestrial technology or materials.
“Neil does not have any special knowledge about the ET bodies and debris from the Roswell crash stored at Wright-Patt,” she wrote. (People Magazine; Newsweek)
She also said that while McCasland once had access to classified programs during his military career, he retired more than a decade ago and his knowledge would now be outdated.
“It seems quite unlikely that he was taken to extract very dated secrets from him,” she wrote.
Frustrated by the speculation, she later used humor to address the rumors circulating online.
“Though at this point with absolutely no sign of him, maybe the best hypothesis is that aliens beamed him up to the mothership,” she wrote, adding that no sightings had been reported over the nearby Sandia Mountains.
Her comments highlight how quickly misinformation can spread online when high-profile individuals become the focus of missing-person cases.
Why Conspiracy Theories Are Spreading
Much of the speculation surrounding McCasland’s disappearance stems from his past role overseeing advanced Air Force research programs.
One of the most widely circulated theories online suggests his disappearance could somehow be tied to classified UFO or unidentified aerial phenomena (UAP) programs. The speculation has been amplified by McCasland’s brief involvement with a company connected to former Blink-182 musician Tom DeLonge that explored public discussion of UAPs.
Other theories circulating on social media suggest that McCasland may have had knowledge of secret aerospace or weapons programs that made him a target.
There is currently no evidence supporting those claims, and investigators have not indicated that his former work is connected to his disappearance.
Experts say speculation around national security programs is common whenever high-profile military figures are involved in unexplained events.
The combination of McCasland’s rank, his leadership role in the Air Force’s primary research laboratory and the secrecy that often surrounds advanced defense technology has created a perfect environment for online rumors.
The Search Continues
For now, investigators say their focus remains on locating McCasland and determining what happened after he left his home in late February.
Authorities continue to ask the public to report any information that might assist the investigation.
The disappearance of a retired senior military leader is rare, and for many who once worked alongside him in the defense science community, the unanswered questions surrounding the case remain troubling.
Until authorities uncover new information, the search for McCasland continues, along with the hope that the mystery surrounding his disappearance will soon be resolved.
