Courts and National Security

A federal judge in Detroit on Feb. 5 dismissed charges against three Chinese research scholars at the University of Michigan after the Justice Department abruptly asked to drop a case it had previously touted as a national‑security win, defense lawyers now say following intervention by China’s Chicago consulate. Xu Bai and Fengfan Zhang had been accused of conspiring with fellow scientist Chengxuan Han to improperly ship biological materials from China ahead of her 2025 lab stint in Ann Arbor, and a third researcher, Zhiyong Zhang, was charged with lying to investigators; all three spent more than three months in U.S. jails before being allowed to return to China. Attorneys say the supposedly sensitive materials were largely tiny, transparent worms routinely used in chemical and light‑sensitivity research, with no evidence of biothreats, and that they were in plea talks over misdemeanors when they were told 'serious talks' were underway between Beijing and Washington about the students. The dismissal follows earlier cases in which two other Chinese temporary researchers pleaded to smuggling and false‑statement counts over mislabeled shipments of worms and a common plant fungus and were deported after short sentences, even as independent experts concluded the organisms posed no public‑safety risk. The episode underscores the tension between aggressive U.S. prosecutions framed as guarding against Chinese biothreats and the risk of overreach that sweeps up routine scientific exchanges, and it raises hard questions about how and why DOJ walked away after foreign government pressure in a case it had once used to burnish its security credentials.