Former FBI chief warns missing nuclear scientists fit a suspicious foreign intelligence pattern.

A dozen cases involving missing or deceased American nuclear scientists have recently surfaced, prompting a retired high-level FBI official to warn that some fit a deeply suspicious pattern. Chris Swecker, former assistant director of the FBI, stated that the mere disappearance of these individuals is inherently alarming. He noted that the sensitive work these scientists performed makes them prime targets for hostile foreign intelligence services like Russia, China, Iran, or Pakistan.

Swecker argues that the six widely reported deaths lack common threads and are likely unconnected. However, he insists authorities must investigate potential links among the missing, given the high-value, sensitive technology they handled. The initial wave of theories began with the disappearance of retired Air Force Maj. Gen. William Neil McCasland earlier this year. As a former commander of the Air Force Research Laboratory, McCasland had ties to Los Alamos National Laboratory, where top-secret nuclear research occurs. He vanished in New Mexico after leaving his home with only boots and a handgun, abandoning his phone, keys, and glasses. Swecker confirmed that the FBI arrived uninvited at McCasland's residence that very afternoon.

The investigation now focuses on a specific group of individuals who share a distinct pattern of vanishing. Anthony Chavez, 79, worked at Los Alamos National Laboratory until retiring in 2017. He reportedly disappeared on May 8, 2025, leaving his car locked in the driveway and walking away without his phone, wallet, or keys. Melissa Casias, 53, also of Los Alamos, went missing on June 26, 2025. Steven Garcia, 48, vanished from Albuquerque on August 28, 2025. Garcia worked at the Kansas City National Security Campus, which develops nonnuclear components for nuclear weapons, and reportedly left on foot carrying only a handgun. He held a top secret security clearance.

Swecker believes Chavez, Casias, and Garcia should be grouped together as they fit a clearer pattern than isolated killings. "They disappeared with all their personal belongings left behind," he said. "Some took their handguns, which means they are either in fear or planning to use them on themselves." He emphasized that this exact pattern suggests a coordinated effort rather than random acts.

Swecker issued a stark warning to scientists and defense contractors working in top-secret fields. He explained that nations like China and Russia engage in daily collection efforts to steal technology because they struggle with domestic research and development. Their programs depend on stealing intellectual property and reverse engineering it. "Scientists, people involved in the defense contracting companies, research and development at universities," he advised, "ought to be aware that this type of stuff goes on day in and day out." Last week, the White House directed the FBI to coordinate an investigation into these cases, and the inquiry remains ongoing.