SHOCK: FBI and U.S. Congress Launch Federal Probe into 11 NASA and Nuclear Scientists Who Vanished or Died Mysteriously

As of June 2026, the FBI is spearheading a formal federal investigation into the deaths and disappearances of at least 11 U.S. scientists and researchers with ties to NASA, nuclear programs, rocket technology, and classified defense work. The probe, prompted by a wave of public reports and congressional pressure, has raised urgent national-security alarms.

In April 2026, House Oversight Committee Chairman James Comer (R-Ky.) and Subcommittee Chair Eric Burlison (R-Mo.) sent letters demanding briefings from the FBI, Department of Energy, Department of Defense, and NASA. They cited “unconfirmed public reporting” on at least 10–11 individuals who “had a connection to U.S. nuclear secrets or rocket technology” and either died or “mysteriously vanished” in recent years. Comer warned the pattern was “unlikely to be a coincidence” and could represent “a grave threat.”

FBI Director Kash Patel confirmed the bureau is actively looking for connections to classified access or foreign actors. The White House has coordinated a “holistic review,” with Press Secretary Karoline Leavitt stating all relevant agencies are involved. President Trump publicly called the situation “pretty serious stuff.”

Among the cases are:

• Retired Air Force Major General William Neil McCasland (missing since February 2026 while hiking)
• Los Alamos National Laboratory employees Anthony Chavez and Melissa Casias (both vanished in 2025; Casias’s remains were later found by a hiker)
• NASA/JPL engineers and contractors such as Monica Jacinto Reza and others linked to SpaceX and Blue Origin programs

Some deaths have been ruled natural, homicides, or suicides, while others remain open missing-persons cases. Critics label the wave a conspiracy theory amplified online, noting that thousands of cleared personnel work in these fields and statistical mortality rates are not unusual. Officials, however, continue examining potential patterns, foreign involvement, or targeted threats.

As the investigation deepens into mid-2026, the fates of these scientists remain unresolved—leaving families, lawmakers, and the public demanding answers about whether America’s most sensitive minds are being systematically silenced.