A Chinese postdoctoral researcher pleaded guilty and was sentenced after admitting he smuggled biological material into the United States concealed in a mislabeled package, leading to prison time, a fine, supervised release, and deportation.

Youhuang Xiang (“Xiang”), 32, a former post‑doctoral researcher at Indiana University who holds a Ph.D. from the Chinese Academy of Sciences, received more than four months in prison, a $500 fine, and one year of supervised release after admitting he smuggled biologic materials from China into the U.S. He had entered the country on a U.S. Non‑Immigrant student (J‑1) visa to begin postdoctoral work in the Department of Biology at Indiana University Bloomington on June 12, 2023.

Federal agents began probing suspicious shipments from China to Indiana University affiliates in November 2025, and the investigation traced a March 2024 package sent to Xiang’s Bloomington residence. The parcel came from Guangzhou Sci‑Tech Innovation Trading and, according to the shipping manifest, contained “Underwear of Man-Made Fibers, Other Womens.” Investigators considered the manifest and sender details unusual given the sender’s science-and-technology focus and the recipient’s research access.

According to court materials, Xiang admitted during a Customs and Border Protection interview on November 23, 2025, at Chicago O’Hare International Airport that the manifest for the March 2024 package had been intentionally mislabeled. He acknowledged that samples of DNA of E. coli bacteria were concealed in that package to evade U.S. legal controls, and immediately after those admissions CBP terminated his J‑1 visa and the FBI took him into custody.

During the sentencing hearing on April 7, 2026, the court was told the FBI’s probe also uncovered Xiang’s membership in the Chinese Communist Party and that he lied about that affiliation when immigration officials questioned him. Those findings complicated the case and underscored national security concerns tied to the movement of biological materials and the exploitation of academic access.

“Those who attempt to secretly bring biological materials into the United States are taking a serious risk with public safety,” said FBI Indianapolis Special Agent in Charge Timothy J. O’Malley. “Concealing E. coli to avoid detection shows a clear disregard for the law and for the safety of others. The FBI will not tolerate these actions and will ensure those responsible are brought to justice.”

As part of Xiang’s plea agreement he stipulated to the entry of a Judicial Order of Removal that will result in his immediate removal to the People’s Republic of China after serving his sentence. The case was jointly investigated by the FBI Indianapolis Division, U.S. Customs and Border Protection, and the U.S. Department of Agriculture, Office of Inspector General, and the sentence was imposed by Chief U.S. District Court Judge James R. Sweeney II.

U.S. Attorney Tom Wheeler issued a strong statement about the breach of rules and the threat posed by such conduct. “Xiang intentionally exploited his access to laboratory facilities at one of Indiana’s flagship research universities, and the privileges of his J‑1 visa status, to illegally smuggle biological materials into the United States. Conduct like Xiang’s circumvents diligent inspection of potentially harmful substances by CBP, USDA, and those agencies required by law to prevent the introduction of invasive and harmful biologic materials into our country. Such conduct poses a very serious threat to public safety and to the health of our agricultural economy,” said Tom Wheeler, United States Attorney for the Southern District of Indiana.

“Let me be clear: The Customs laws and regulations of the United States exist to protect our borders, our economy, and the citizenry of this Country. They may not be ignored at the whim and folly of scientific researchers and academic institutions. Our office remains firmly committed to working with our exceptional law enforcement partners to protect Hoosiers and defend the United States against such grave national security threats.”

USDA Inspector General John Walk emphasized the agricultural and grant-related angle of the scheme, noting federal funding and trade fraud risks. “This Chinese Communist Party member exploited a federally funded research grant from USDA to smuggle dangerous biological material into the United States. The sender lied on the manifest to hide the dangerous nature of the shipment. USDA OIG actively combats the illegal import of biological materials, treating these threats to agricultural security and public safety with the highest investigative priority. We will continue to work hand-in-hand with law enforcement partners like CBP and FBI against trade fraud and stop the exploitation by foreign adversaries of federal grants administered by USDA,” said USDA Inspector General John Walk.

The prosecution was led by the U.S. Attorney’s Office National Security Unit, and U.S. Attorney Wheeler publicly acknowledged Assistant U.S. Attorney Matthew Rinka, who handled the case. The sentence, removal order, and interagency investigation together signal a tougher posture on illicit transfers of biological material and the exploitation of university access and visa privileges by foreign nationals with troubling affiliations.