Case of Han Lang Defending the Innocent and the Rehabilitation of the Chu Prison

In 70 CE, during the Eastern Han Dynasty, Prince of Chu Liu Ying was accused of treason. Emperor Ming launched a harsh purge, leading to widespread torture overseen by the Tingwei. Thousands were arrested based on confessions extracted under extreme duress. The investigator Han Lang discovered that suspects Yan Zhong and Wang Ping, under torture, had arbitrarily named innocent people to stop the pain. Han Lang risked his life to appeal directly to Emperor Ming, arguing that the confessions were unreliable because the implication chains were physically impossible. His daring logic shocked the Emperor, who then investigated personally. Realizing the scope of the injustice, Emperor Ming exonerated over a thousand innocent prisoners who had been wrongfully implicated in the Chu Prison case.

Han Lang's reasoning was accepted by Emperor Ming. The emperor personally reviewed the case and determined that the vast majority of the implicated prisoners were innocent. Consequently, over a thousand innocent individuals were released, and the massive purge was halted.

The core dispute was the admissibility and reliability of confessions extracted under severe torture. Han Lang challenged the standard judicial process of "implication chains," arguing that suspects in chains could not possibly have intimate knowledge of randomly named individuals, proving the evidence was fabricated.

The case highlighted the severe dangers of torture-based judicial systems and established Han Lang as a legendary symbol of judicial integrity in Chinese history. It temporarily curbed the abuse of power in treason cases and influenced later generations' views on evidence evaluation and the importance of direct appeals to imperial justice.