A third Chinese scientist has been charged with smuggling biological materials into the United States after a University of Michigan student and her boyfriend were caught last week.
Chengxuan Han was arrested on Sunday at Detroit Metropolitan airport and charged with smuggling goods into the US.
Police allege Han sent four packages which 'contained biological material related to round worms' from China to the US.
The packages were sent between September 2024 and March 2025 and addressed to people linked to the laboratory at the University of Michigan.
Han initially denied sending the packages at all, according to court documents. She later insisted they contained plastic cups, rather than petri dishes.
