September 2, 1972 - Zhao Zhihong
His case carried consequences beyond his own crimes: the investigation into his killings helped establish that Huugjiltu, a man executed in 1996 for one of the same murders, had been wrongfully put to death — one of the most significant wrongful execution cases in Chinese legal history. Operating across Inner Mongolia over nearly a decade, he carried out a sustained pattern of sexual violence and homicide that went undetected long enough to claim multiple victims.
From Wikipedia
Zhao Zhihong (simplified Chinese: 赵志红; traditional Chinese: 趙志紅; pinyin: Zhào Zhìhóng; 5 September 1972 – 30 July 2019), nicknamed The Smiling Killer and Demon, was a Chinese serial killer and rapist. He admitted to committing a total of 20 serious crimes between 1996 and 2005, including raping and killing eleven women in Ulanqab and Hohhot in Inner Mongolia. He was executed in 2019 following a court verdict.
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