After extensive investigations at the scene, the police found a lot of evidence. Faced with a lot of hard evidence, Lin Senhao admitted that he had put dimethylnitrosamine into the bucket. On April 17, Huang Yang died after failed rescue due to his serious condition. During the court trial, Lin Senhao kept telling the prosecutor that he had no motive to kill and that it was just an April Fool's Day joke. For a time, the Fudan graduate student poisoning case attracted widespread attention in society, and most people thought it was a murder case. Who would joke with something that could kill people? On February 18, 2014, Lin Senhao was sentenced to death by the Shanghai Second Intermediate People's Court for Intentional Homicide and deprived of political rights for life. After the verdict was announced, Lin Senhao's father felt that his son was wronged, so he decided to appeal. What is even more puzzling is that after Lin Senhao was sentenced to death, more than 100 Fudan students jointly requested the court to cancel Lin Senhao's death sentence. Soon, this incident caused heated discussions in society again. Some people felt that the sentence was too heavy, while others felt that this was an unjust case. Lin's father found a lawyer, hoping to change the verdict in the second trial, preferably to be found not guilty. But now the most urgent task is to change the death penalty to suspended death penalty, but this requires a letter of forgiveness from the victim's family, and the best time to apologize has passed. Huang Yang's father also said that from the time Huang Yang was killed to the first trial, the Lin family never apologized to them, and even pretended to be calm. It seemed like they didn't care, and it seemed that they didn't care at all, and they didn't even show any guilt or try to hide their guilt.
It was not until Lin Senhao was sentenced to death in the first trial that Lin's father sent a text message saying that Lin Senhao was just joking. After being sentenced to death, Lin Senhao regretted it. In order to stay alive, he wrote an apology letter to Huang Yang's father. In the letter, he kept saying that it was just an April Fool's joke. Hearing this, Huang Yang's father was very angry. How could there be a joke that would kill someone? Then he rejected Lin Senhao's apology. But what people didn't expect was that after Huang Yang's father refused to apologize, he was actually subjected to cyber violence. Some people said that he was vicious and only wanted Lin Senhao's life. Faced with all kinds of cyber violence, Huang Yang's father also explained why he didn't forgive Lin Senhao. From the time Huang Yang was poisoned, Lin Senhao did not choose to send him to the hospital, and until Huang Yang was admitted to the intensive care unit, Lin Senhao did not tell the truth, which eventually led to Huang Yang's death. Just when Huang Yang's father was facing cyber violence, 177 students from Fudan University jointly pleaded for Lin Senhao. This letter not only triggered public opinion again, but also had a serious impact on the court's second-instance judgment. Lin Senhao's lawyer Tang Zhijian was also looking for loopholes. In the second trial, Lin Senhao chose to refute that the testing party did not issue the content proving the presence of toxic substances, and he believed that dimethylnitrosamine had been diluted and could not cause death. Huang Yang was likely to have acute liver damage caused by fulminant hepatitis B. After a long discussion between the prosecutor and more than 20 witnesses, it was confirmed that Huang Yang's cause of death was dimethylnitrosamine. Although Huang Yang had a history of hepatitis B, Huang Yang was not in the onset period at the time. All kinds of evidence confirmed that Lin Senhao was deliberately killing people. In his master's thesis "Experimental and Clinical Research on Evaluation of Liver Fibrosis by Ultrasonic Elastic Imaging", Lin Senhao clearly wrote that dimethylnitrosamine is a chemical substance with hepatotoxicity, genotoxicity and immunotoxicity.
It can be seen that Lin Senhao's understanding of the basic toxicity of dimethylnitrosamine and its ability to cause liver failure and even death in organisms is clear and clear. After being arrested, Lin Senhao always claimed that he was just an April Fool's joke and he had no intention of killing Huang Yang. Lin Senhao's defense lawyer believes that Lin Senhao should be charged with intentional injury or negligent homicide, and does not constitute intentional homicide. However, after a long trial, the court upheld the original verdict based on Lin Senhao's criminal facts and laws and regulations. After sentencing Lin Senhao to death, Lin's father still refused to accept the court's decision and wanted to continue to appeal. A letter written by Lin Senhao to his father caused a stir in public opinion. The letter said that facts speak louder than words, and he could only admit it and must admit it. Although public opinion was divided into two factions, Lin Senhao's criminal facts had been determined, and no one could let him escape the severe punishment of the law. When asked about Lin Senhao's motive for the crime, he was ambiguous. He said that on the night before April Fool's Day, because Huang Yang said that he and others were planning to play a trick on someone, Lin Senhao was a little uncomfortable, and at that time Lin Senhao was a little angry, and he couldn't calm down, so he came up with the idea of playing a trick on Huang Yang. He said that April Fool's Day was coming and he was going to play a trick on someone, and while saying it, he was patting his classmate Gu Lingyuan's shoulder. I saw that he looked very proud, and I thought, then I will play a trick on him tomorrow. We happened to go to the place where I had experimented the next day, and I heard from another classmate that someone in other places had used this poison to play tricks on classmates, so I did such a thing by accident. As for why he used dimethylnitrosamine, it was because Lin Senhao heard that there was a similar case in Tsinghua University, where someone poisoned but it ended up in vain.
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