ALBUQUERQUE, NEW MEXICO — The most unsettling detail in the disappearance of retired Air Force Major General William “Neil” McCasland may not be the fact that he vanished.

It may be what he left behind.

On February 27, 2026, McCasland disappeared from his Albuquerque home. His phone remained inside. His prescription glasses were also left behind. Other tracking devices were reportedly not with him.

But his wallet was gone.

So was a red backpack.

His hiking boots were missing.

And investigators say a .38-caliber revolver was also unaccounted for.

That combination has left investigators and the public trying to reconstruct the final hours of a man whose professional life had been defined by planning, technology and careful decision-making.

McCasland was 68 when he disappeared. He had previously served as a U.S. Air Force major general and commanded the Air Force Research Laboratory. His career included senior positions involving aerospace and defense research.

Yet on the morning he vanished, the man who had spent decades around sophisticated technology apparently left without the very devices that could have helped authorities track him.

According to the timeline reported during the investigation, a repairman interacted with McCasland at his home at approximately 10 a.m. His wife left the house around 11:10 a.m. for a medical appointment.

When she returned at approximately 12:04 p.m., McCasland was gone.

There was no car missing.

The vehicles and bicycles remained at the property.

That led his wife to believe he may have left on foot.

Several hours later, she called 911.

The newly released recording became one of the most disturbing pieces of evidence in the case. Wilkerson told the dispatcher that she believed her husband might have deliberately arranged to disappear.

She pointed to his phone.

He had turned it off and left it behind.

For a person who normally carried his phone, she found the behavior unusual.

But even that explanation remains uncertain.

A person deliberately planning to disappear might leave a phone behind to avoid being tracked. A person experiencing a medical or psychological crisis might also behave unpredictably.

Investigators have not publicly established which explanation, if any, is correct.

That uncertainty is central to the case.

The search began quickly.

Authorities issued a Silver Alert because of concerns about McCasland’s safety. Search teams were deployed around Albuquerque and the surrounding terrain.

The geography created another challenge.

The Sandia foothills and surrounding wilderness can provide vast areas in which a person on foot can become difficult to locate. Search teams used helicopters, drones and dogs while investigators reviewed tips and available video evidence.

Then came the weather.

An unusually warm spring complicated thermal-imaging searches. Infrared technology is most useful when a person’s heat signature clearly contrasts with the surrounding environment. Warmer ground and vegetation can reduce that contrast.

For investigators, every hour mattered.

McCasland was an experienced outdoorsman, and authorities were concerned about how long he could survive if he had become injured or disoriented.

Yet despite extensive efforts, no confirmed sighting emerged.

The case took another strange turn on March 7.

A gray Air Force sweatshirt was found roughly 1.25 miles east of McCasland’s home. The location immediately attracted attention because of his military history and the proximity to his residence.

But the garment could not be conclusively connected to him.

His family was unable to confirm that it belonged to McCasland.

The discovery therefore remained a clue, not proof.

Another important detail came from the previous day.

On February 26, McCasland was captured on surveillance at an REI store. Los Angeles Magazine later identified that footage as the last verified image of him before his disappearance.

That image has become a visual dividing line in the case.

Before the image: McCasland was alive, visible and moving through ordinary life.

After the image: investigators were left with an unexplained disappearance.

The circumstances have naturally attracted speculation.

McCasland’s military career made him an unusual missing person. He had commanded a major Air Force research organization and had worked around sensitive aerospace programs.

Internet communities quickly connected those credentials with UFO theories.

The theory became even more attractive because McCasland had some historical association with people and organizations interested in unexplained aerial phenomena.

But the family’s position has been considerably more cautious.

Wilkerson has rejected claims that her husband disappeared because of secret information about UFOs or alleged extraterrestrial material. She pointed out that he had retired more than a decade earlier and did not possess the kind of unique, current access imagined by online commentators.

That distinction is important because the disappearance itself remains unexplained.

When facts are scarce, speculation tends to fill the vacuum.

The same pattern appeared after other deaths and disappearances involving scientists and people connected to U.S. government research. The FBI and other federal authorities examined whether there might be connections among some cases, which further intensified public interest.

But a federal inquiry into possible links is not evidence that a coordinated plot exists.

Nor does McCasland’s disappearance prove that he was targeted because of his former work.

At present, those remain theories.

The confirmed facts are more limited.

A retired general disappeared.

He left his phone behind.

He apparently left without a vehicle.

Several personal items went with him.

A firearm was missing.

A surveillance image exists from the day before.

Search teams covered surrounding areas.

A piece of clothing was discovered but could not be identified as his.

And no publicly confirmed sighting has provided a clear path to his whereabouts.

More than six months later, those facts still do not form a complete story.

They form a puzzle.

And the missing piece is McCasland himself.

For investigators, the next breakthrough could come from something as ordinary as surveillance footage, a forgotten witness, a discarded item or a previously overlooked tip.

For his family, every unanswered day is another day without certainty.

The disappearance of William Neil McCasland remains a mystery not because authorities have publicly confirmed something extraordinary — but because they have not yet found enough ordinary evidence to explain what happened.

And that may be the most haunting part of the case.