A 29-year-old NASA aerospace electrical engineer, whose burned body was discovered inside his Tesla last summer, has become a focal point of an expanding FBI investigation examining roughly a dozen deaths and disappearances of scientists and government researchers with ties to classified defense work.

Joshua LeBlanc worked on nuclear propulsion programs at NASA’s Marshall Space Flight Center in Huntsville, Alabama. When he failed to appear at work or contact family on July 22, 2025, his relatives reported him missing. Within hours, authorities located his Tesla off the roadway, where it had crashed through a guardrail and into trees before catching fire. The vehicle was burned beyond recognition, and LeBlanc’s charred remains were found inside.

Tesla vehicle data allowed investigators to trace LeBlanc’s movements before the crash. Records showed his car remained stationary at Huntsville International Airport for four hours before traveling west along rural backroads. Federal authorities have not publicly disclosed whether his death connects to other cases, but it now sits within a broader review covering 10 to 12 incidents dating to 2022.

The FBI announced on Tuesday, April 21, 2026, that it would lead the investigation, working alongside the Department of Energy, the Department of Defense, and state and local law enforcement. The probe has captured attention from President Trump and the White House, sparked congressional demands for answers, and fueled widespread online theories about whether individuals with access to classified research are being deliberately targeted.

During the week of April 20, Trump told reporters he had just left a meeting focused on the pattern.

“I hope it’s random, but we’re going to know in the next week and a half,” Trump said, calling the situation “pretty serious stuff” and noting that “some of them were very important people.”

White House press secretary Karoline Leavitt said on X that the administration is “actively working with all relevant agencies and the FBI to holistically review all of the cases together” and that “no stone will be unturned.” Secretary of Energy Chris Wright confirmed on Fox News Sunday that the Department of Energy (DOE) — which oversees the nation’s nuclear labs — is a central player in the probe, telling viewers that “a lot of the nuclear security scientists are in DOE.”

Several of the cases cluster around NASA’s Jet Propulsion Laboratory and Los Alamos National Laboratory, two of the nation’s most sensitive research facilities. Among those under federal review is Monica Reza, a 60-year-old aerospace engineer who directed materials processing at NASA’s Jet Propulsion Laboratory and disappeared while hiking in the Angeles National Forest in June 2025. Steven Abel Garcia, a 48-year-old government contractor who worked as a property custodian for the Kansas City National Security Campus in Albuquerque, has been missing since August 2025.

In Huntsville, where LeBlanc worked, another researcher has drawn renewed scrutiny. Amy Eskridge, 34, co-founded the Institute for Exotic Science in the city and had been working on antigravity technology. She died in June 2022 under different circumstances. Authorities ruled her death a suicide by self-inflicted gunshot wound, but her name has resurfaced as federal officials piece together a broader timeline.

The disappearance of retired Air Force Maj. Gen. William Neil McCasland has generated perhaps the most intense speculation. The 68-year-old vanished from his Albuquerque, New Mexico, home in February. Before he left, McCasland—the former commanding officer of the Air Force Research Laboratory at Wright-Patterson Air Force Base—took several items with him: hiking boots, his wallet, and a .38-caliber revolver in a leather holster. He left behind his mobile phone, corrective eyeglasses, and fitness tracking devices.

His past ties to To The Stars, Inc., a company co-founded by Blink-182 musician Tom DeLonge that studies unidentified aerial phenomena, have intensified online conspiracy theories. His wife, Susan McCasland Wilkerson, has rejected suggestions that classified knowledge played any role in his disappearance.

“He retired from the [Air Force] almost 13 years ago and has had only very commonly held clearances since,” she wrote in a Facebook post. She added in the same post: “This connection is not a reason for someone to abduct Neil.”

Investigators in Bernalillo County confirmed that as of late April they have found no evidence of foul play in McCasland’s disappearance. The only physical trace recovered was a gray Air Force sweatshirt found 1.25 miles east of his home on March 7. He remains missing.

The House Oversight Committee has launched its own parallel investigation, formally requesting briefings from the Department of Defense, the Department of Energy, NASA, and the FBI regarding the “disappearance and death of individuals with access to sensitive U.S. scientific information.” The committee gave all relevant agencies a deadline of April 27 to provide a staff-level briefing.

The Department of Defense told the committee directly that “there are no active national security investigations of any reported missing person who was a current or former clearance holder involved in special access programs” — a response the committee said “leaves many unanswered questions.”

Rep. Tim Burchett, R-Tenn., has been among the loudest voices pressing for answers, telling the Daily Mail that U.S. intelligence agencies had previously stymied his attempts to learn what happened to McCasland and several other researchers. “The numbers seem very high in these certain areas of research,” Burchett said. “I think we’d better be paying attention, and I don’t think we should trust our government.”

NASA has said it is cooperating fully with investigators and is committed to transparency. However, spokesperson Bethany Stevens stated that “at this time, nothing related to NASA indicates a national security threat.”

Officials familiar with the individual investigations caution that many of the cases appear unrelated on closer inspection, while others appear to stem from medical issues or personal circumstances. Yet the common threads are access to sensitive nuclear, aerospace, or defense research and a post-2022 timeline, and have proven impossible for federal investigators to ignore.

Outside experts have pushed back sharply on the conspiracy framing. Science writer Mick West has noted that more than 700,000 people hold top-secret clearances in U.S. aerospace and nuclear sectors, a pool large enough that roughly 250 would statistically die from homicides and suicides over any comparable four-year period. Medical sociologist Robert Bartholomew, who specializes in social hysteria, has characterized the perceived pattern as a textbook case of apophenia — the human tendency to find meaningful connections in unrelated events.

As the FBI expands its review and lawmakers demand briefings, the families of the missing and deceased are left waiting for answers. Whether the pattern proves to be a chilling coordinated campaign against America’s scientific elite or a tragic series of coincidences amplified by the internet age, may become clearer in the coming weeks as investigators work across agencies to untangle the mystery.