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He commanded America's most classified aerospace programs, briefed people on UFOs, and walked out of his New Mexico home one morning never to be seen again. Now an investigator claims he might still be alive and hiding. Here is everything we know.

It reads like the opening chapter of a thriller novel. A retired United States Air Force major general with access to some of the country's most sensitive secrets disappears on foot from his home in Albuquerque, New Mexico. He leaves behind his phone, his prescription glasses, his watch, and every other device that could be used to track him. His wallet, a .38-caliber revolver, and a red backpack are gone. The FBI gets involved. Hundreds of homes are canvassed. Drones and helicopters sweep the mountains. And still, after more than a hundred days, not a single confirmed sighting.

This is not fiction. This is the real and deeply unsettling case of Major General William Neil "Neil" McCasland, 68, who vanished on the morning of February 27, 2026, and has not been seen since. The story has gripped the American public, ignited furious debate online, and drawn in everyone from investigative journalists and UFO researchers to members of Congress and the FBI. And now, a private investigator has made a claim that is guaranteed to send the speculation into overdrive: that McCasland may still be alive and deliberately hiding somewhere in the vast wilderness of New Mexico.

This article digs deep into every confirmed fact, every credible theory, and every chilling detail of a case that refuses to go away.

Who Is Major General William Neil McCasland?

Before understanding why his disappearance has caused such a shockwave, you need to understand who this man actually was. McCasland is an astronautical engineer with degrees from the United States Air Force Academy, the Massachusetts Institute of Technology, and the John F. Kennedy School of Government at Harvard University. During his career, he served as chief engineer on the Department of Defense's Global Positioning System program, as system program director of the Space Based Laser Project Office, and as director of special programs at the Pentagon.

He was the commander of the Air Force Research Laboratory at Wright-Patterson Air Force Base, where he managed the Air Force's $2.2 billion science and technology program as well as additional customer-funded research and development of another $2.2 billion. That is an extraordinary level of responsibility. He was not a peripheral figure in the world of American defense. He was at the very center of it.

McCasland's involvement with the topic of unidentified flying objects became public when WikiLeaks released an archive of Hillary Clinton Campaign chairman John Podesta's email records in 2016. Those emails revealed a correspondence between Podesta and McCasland that touched on UFO disclosure, dragging the general's name into one of the most contested topics in American public life.

After retirement, McCasland briefly worked with Blink-182 musician Tom DeLonge, a co-founder of To The Stars, Inc., a company that studies information about unidentified aerial phenomena, his wife said. It was an unusual association for a man of his background, but it cemented his place in the world of UAP research in the eyes of the public.