After the Spring Festival in 2003, he was detained in Hebi City Detention Center, Henan Province, thousands of miles away, in the same prison as Ma Tingxin, a suspect in a murder case in Xun County under the jurisdiction of Hebi City at that time. According to Ma's statement after he was acquitted, he agreed to "surrender" only after being tortured and following Yuan's "temptation". The surrender materials were also written by Yuan. Ma Tingxin confessed: "I said I didn't kill that man. I don't know how to write. He (Yuan) will write to me. " Every time Ma Tingxin comes back from the arraignment, he knows everything he says.
In April 2004, Yuan appeared in Gongshu District Detention Center in Hangzhou, with the same name as Zhang Hui. At that time, Zhang Gaoping and Zhang Hui's uncle were suspects in a rape and murder case, and the police did not have any traces of physical evidence. On the contrary, according to the identification, the stranger's DNA under the female victim's fingernails does not belong to these two uncles. As soon as he entered the cell, Yuan repeatedly asked Zhang Hui if he did it. Zhang denied it and was beaten by Yuan. The 26 pieces of evidence in the guilty verdict of the first instance in this case are almost circumstantial evidence before and after the crime. Only Yuan testified that Zhang Hui claimed to have raped and killed a woman in the detention center.
Fortunately, after serving nearly 10 years, Uncle Zhang was acquitted by Zhejiang High Court on March 26th, 20th13. Yuan's sentence was reduced for "sending' off-site' for many times to assist the public security organs' work'", with the first reduction of 1.5 years and the second reduction of 10 months. He was released from prison as early as September 2004.
The case of Yuan can be confirmed from the above situation: Yuan was both the "big brother" and the "captain" in Hebi No.1 Detention Center and Zhang Hui in Gongshu District Detention Center, and participated in making the suspect confess the crime.