A federal judge has revoked the U.S. citizenship of a married couple who conspired to steal sensitive American medical technology and funnel it to China.
On Monday, U.S. District Judge James E. Simmons Jr. ordered the denaturalization of Li Chen and Yu Zhou, ruling that the pair illegally obtained their citizenship after engaging in serious criminal conduct that disqualified them from ever becoming Americans in the first place.
Chen and Zhou weren’t just any immigrants—they were highly educated researchers working inside Nationwide Children’s Hospital, entrusted with cutting-edge medical research.
Instead, prosecutors say they:
- Stole proprietary exosome medical technology
- Profited financially from the theft
- Funneled sensitive intellectual property to China
- Received funding tied to the Chinese government
The couple ultimately pleaded guilty to:
- Conspiracy to commit theft of trade secrets
- Conspiracy to commit wire fraud
According to the DOJ press release:
On March 30, Judge James E. Simmons Jr., of the U.S. District Court for the Southern District of California entered an order revoking the naturalized U.S. citizenship of husband and wife Li Chen and Yu Zhou, finding they illegally procured their naturalization. Chen and Zhou each previously pleaded guilty to one count of conspiracy to commit theft of trade secrets and one count of conspiracy to commit wire fraud, which the court determined constituted crimes involving moral turpitude that prevented them from having the good moral character necessary to naturalize. The court additionally found that both Chen and Zhou were ineligible to naturalize because they committed unlawful acts that adversely reflected on their moral character for which there were no extenuating circumstances.
“Gaining citizenship after committing serious crimes against the American people is an unacceptable abuse of our immigration system,” said Attorney General Pamela Bondi. “These latest denaturalizations illustrate this Department of Justice’s focus on ensuring that citizenship remains a privilege to obtain, not a right to abuse.”
“Naturalization is not a right — it’s a privilege given by the generous people of this nation,” said Assistant Attorney General Brett A. Shumate of the Justice Department’s Civil Divison. “When the generosity of America’s immigration process is abused, our system works to correct such abuse. Full stop.”
Chen, a Chinese national, entered the United States in 2007 on an H-1B Specialty Occupation visa sponsored by Nationwide Children’s Hospital (NCH). In 2011, after U.S. Citizenship and Immigration Services approved a Form I-140, Immigrant Petition for Alien Worker as an alien of extraordinary ability, Chen adjusted her immigration status to permanent resident. Zhou, also a Chinese national, entered the United States in 2005 as an exchange visitor. In 2008, Zhou arrived in the United States again on an H-1B Specialty Occupation visa sponsored by NCH, and he adjusted his immigration status to permanent resident in 2011 as the derivative spouse of his wife, Chen. Chen naturalized in 2016, and Zhou naturalized in 2017.
In 2019, both Chen and Zhou were arrested for criminal conduct involving the theft of medical trade secrets used in the course of their employment as NCH research scientists focused on exosome isolation. Each indictment alleged that the couple personally benefitted from their theft and sale of NCH trade secrets by establishing their own company and by acquiring shares in another company that utilized the stolen trade secrets. In addition, both Chen and Zhou received funding from the People’s Republic of China’s State Administration of Foreign Expert Affairs. In total, Defendants jointly received nearly $1.5 million in transactions resulting from their exchange of exosome isolation intellectual property. Chen was subsequently sentenced to 30 months in prison and three years of supervised release, and Zhou was sentenced to 33 months in prison and three years of supervised release, with over $2.6 million in restitution ordered to be paid jointly and severally between them.
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