Two virologists from the National Institutes of Health's Rocky Mountain Laboratories were charged on June 2 with conspiracy to smuggle monkeypox and making false statements after federal investigators discovered 113 microcentrifuge tubes hidden in Styrofoam coolers inside a large black case the scientists had declared contained only "diagnostics and testing equipment."
The criminal charges alone would be alarming enough. But documents released by Senate Committee on Homeland Security and Governmental Affairs Chairman Rand Paul, R-Ky., paint a far broader picture, one in which biosafety shipping rules at NIH and among its collaborators were routinely bent, ignored, or worked around for years.
The two scientists, Vincent Munster and Claude Kwe arrived at Detroit Metropolitan Airport in January from the Republic of the Congo, where a monkeypox outbreak was active. What they told customs about the contents of their luggage and what the FBI later found inside told two very different stories.
FBI testing of 20 of those tubes found 17 containing deactivated monkeypox virus, one with chickenpox virus, and two with human DNA. An NIH sequencing request logged 35 samples derived from human patients and confirmed they contained or were derived from a regulated "select agent", a federal designation reserved for biological materials that pose a severe threat to public health.
According to the documents released by Senator Paul, in September 2011, EcoHealth Alliance researcher Jon Epstein emailed Munster and colleagues about shipping bat samples from Congo to Montana. Epstein suggested shipping sera and swabs in lysis buffer on wet ice while proposing Munster "hand carry" another set in viral transport media on dry ice during a later trip.
Epstein wrote: "I think you can take up to 2kg with you on commercial flights." Senate investigators described the exchange as displaying an early willingness within the network of colleagues to bypass standard cold-chain shipping for high-risk field samples.
That was fourteen years ago. The workarounds never stopped.
In 2013, NIH distributed the Jordan strain of Middle East Respiratory Syndrome coronavirus, MERS-CoV, to labs including Munster's at Rocky Mountain Laboratories and Ralph Baric's at the University of North Carolina. The shipment to UNC was labeled "diagnostic, not infectious," lacked a proper itemized list or dangerous-goods declaration, and was initially handled as Category B instead of the required Category A infectious substance labeling.
The U.S. Department of Transportation defines a Category A infectious substance as "a highly dangerous biological material capable of causing permanent disability, life-threatening disease, or death in otherwise healthy humans or animals."
UNC's Environmental Health and Safety office flagged the labeling error as "a big problem." That phrase, "a big problem", apparently did not produce a lasting fix.
By December 2021, Munster informed colleagues he planned to arrange an international shipment of the Omicron variant of SARS-CoV-2 "without the involvement of NIH shipping." An NIH official responded in writing that the plan risked "a Washington Post moment or congressional inquiry."
The official also noted that Rocky Mountain Laboratories had no approved shipping procedures on file. Munster pressed ahead anyway.
Emails from 2022, included in the documents Paul released, reference multiple lost shipments. In one exchange, a collaborator urged Munster to contact DARPA quickly after reporting that coronavirus samples en route to the U.S. Army Medical Research Institute of Infectious Diseases had gone missing.
The collaborator's language was blunt. Someone, the email said, had lost the first shipment, using a profane term to describe the responsible party. Munster replied that he would follow up. By April 2024, he reported that no material had been recovered from the prior lost shipment.
That same month, April 2024, Kwe reported that he and colleagues had returned from the Congo with DNA from monkeypox positive patient samples. What happened next led to the January airport incident and the June criminal charges.
When Munster and Kwe landed at Detroit Metropolitan Airport in January, they declared the large black case held diagnostics and testing equipment. Federal investigators found something else: 113 microcentrifuge tubes packed in Styrofoam coolers.
The FBI tested 20 of those tubes. Seventeen contained deactivated monkeypox virus. One held chickenpox virus. Two contained human DNA.
On June 2, both men were charged with conspiracy to smuggle monkeypox and making false statements. The Missoula Current News reported that Munster and Kwe were released on conditions, required to surrender their passports, and ordered to appear in Michigan for a hearing on June 24.
The outcome of that hearing has not been reported.
Paul, who earned his medical degree from Duke University School of Medicine in 1993 and specializes in ophthalmologic surgery, has made biosafety oversight a central focus of his committee chairmanship. The documents his committee released frame the Munster-Kwe airport episode not as an isolated lapse but as the latest incident in a pattern stretching back more than a decade.
Senate investigators described the case as "symptomatic of a deeper culture" in which biosafety shipping rules were often treated as flexible. The documents trace a line from the 2011 EcoHealth Alliance emails through the mislabeled 2013 MERS shipments, the 2021 plan to bypass NIH shipping, the 2022 lost shipments, and finally the January 2025 airport discovery.
At each point, someone inside or adjacent to NIH flagged a problem. At each point, the system absorbed the warning and moved on.
Several critical questions remain open. No motive has been stated for the alleged smuggling or false statements. The exact statutes charged beyond the descriptions of conspiracy and false statements have not been specified in available reporting. Whether Munster, Kwe, NIH, or EcoHealth Alliance have offered formal responses or denials is unclear from the released materials.
The chain-of-custody details for the 113 tubes, how they were collected in Congo, who handled them, and what protocols were or were not followed, have not been publicly detailed. Nor have the specific FBI test methods been disclosed.
What is clear is the gap between what NIH's own officials warned could happen and what NIH's own scientists allegedly did. An agency insider predicted a "Washington Post moment or congressional inquiry." He got both, plus a federal indictment.
The instinct in Washington will be to treat this as a story about two rogue scientists. The documents Paul released suggest something harder to dismiss. When a researcher casually emails about hand-carrying pathogen samples on commercial flights, and when a colleague responds with practical tips instead of alarm, the problem is not one bad actor. It is a system that trained its people to treat shortcuts as normal.
When a MERS shipment arrives at a major research university mislabeled as "diagnostic, not infectious," and the fix amounts to a strongly worded internal note, the system has chosen convenience over safety. When an NIH virologist announces he will ship a COVID variant internationally without involving NIH's own shipping office, and the strongest institutional pushback is a warning about bad press, the guardrails are decorative.
The U.S. Department of Transportation does not define Category A infectious substances in vague terms. These are materials "capable of causing permanent disability, life-threatening disease, or death in otherwise healthy humans or animals." That language exists for a reason. It exists because the consequences of a mistake, or a deliberate workaround, land on the public, not on the researchers.
Every passenger on that January flight from Congo to Detroit shared a cabin with 113 tubes of material that two NIH scientists allegedly lied about. Those passengers did not consent to that risk. They did not know it existed.
When the people entrusted with the most dangerous materials on earth treat the rules as suggestions, the rest of us are the ones who pay the price.
