On February 15, 1986, at more than 3 o'clock in the afternoon on the seventh day of the Lunar New Year, on the railway line of Huangnihezi Forest Farm in Dunhua, Jilin, 202 passenger trains slowly drove onto the Shilipu Bridge of the Zhuerduo River. Suddenly, there was a loud bang, and the second carriage was violently**, the carriage cracked, became oval, and all kinds of debris flew around. The doors and windows of the 1st and 3rd carriages were shattered, and even the rails were bent. 
* As a result, 33 people were killed and 32 injured, including 6 seriously. This is the "Jilin Forest Railway Passenger Train ** Case (Huangnihe Train ** Case)" that caused a sensation in the 80s, and the public security organs also called it "215 "extraordinarily large ** case. Information about the case is widely available online, but little is known about the process of solving the case. Ding Lao, who was the political commissar of the Harbin Railway Public Security System, said that although many well-known criminal investigation experts were visited, the case still had twists and turns. The first suspect, the dead young woman, was a serious case, which was supervised by the Ministry of Public Security, and many people came. The ministry specially invited two criminal investigation experts, the deputy director of the major case department and one of the top domestic on-site analysis experts. The Jilin Provincial Public Security Department and the railway public security system have dispatched capable forces to assist in the investigation, and there are also many first-class veteran criminal investigators. Like Political Commissar Ding, who transferred from the Northeast Frontier Department in his early years, he has solved many difficult cases. 
Due to the accident when the train crossed the bridge, the bodies of some of the deceased were scattered on the frozen river, and some fell into the water with heavy objects such as seats smashed through the ice and were sealed under the ice. In order to avoid causing discomfort, the tragic situation at the scene of the crime is not described here. But the first suspect who came into the sight of the task force could not fail to mention that it was a female corpse fished out of the ice. Amazingly, the female corpse had no damage on her face, and it can be seen that she was very beautiful in her lifetime. Soon, someone recognized the face of the female corpse through **, her name is Zheng Liying, 23 years old, a female cadre of the Forest Railway Department of the Huangnihe Forestry Bureau, and she is recognized as the first beauty in the bureau. How did such a young and beautiful girl become the suspect in the ** case? In fact, the opinions of the task force at the beginning were quite unanimous, and they all believed that Zheng Liying was suspected of committing a major crime. 
First of all, the highest level among the deceased in the No. 2 carriage was Xing, deputy director of the Hongshi Forestry Bureau, and the family all died of **. Xing is less than forty, has an excellent job and a bright future. There are local rumors that Zheng Liying, who is not yet married, has an ambiguous relationship with Xing, and Xing's family may be killed by love. Experts from the Ministry of Public Security repeatedly studied the traces of car No. 2 and concluded that the perpetrator had detonated at least 6 kilograms of ammonium nitrate explosives. The direction of the investigation of the case will not be swayed by rumors, however, the traces of the scene show that the seats of Xing and Zheng Liying are next to each other, and the depression blown up at the bottom of the carriage is the center of the **, and Zheng Liying is in that position. 
During the subsequent investigation of the new clues, the case-handling personnel learned that Xing, deputy director of the Forestry Bureau, was not like a person who messed with flowers and grass, but a cadre with a good style. He has a driver and a special car, but he never uses it for non-official business, and usually takes the forest train of the forestry system. This time I was going back to my hometown to visit relatives, and I didn't have a seat when I just got on the bus, so I waited for a long time before I sat down. On the day of the incident, Zheng Liying's two companions were sitting in other carriages, and they and everyone who knew Zheng Liying well thought that she had a decent style and that she had a favorite object in the army, so it was impossible for her to do such a thing. The leaders of the Public Security Department also did not believe that Zheng Liying was a murderer. Next, experts from the Ministry of Public Security and forensic doctors made new discoveries. Zheng Liying was indeed in the center of the ** before her death, but the experts and forensic doctors of the Ministry of Public Security concluded that she was sitting at the time, ** on the side of her neck. Who would use such a strange posture to induce ** medicine? 
The investigators hardly slept until 48 hours after the incident, and got a clue that the suspect pointed to Zheng Mouli, a staff member of the forestry system, who was also killed. There are some clues in the case that were provided by the survivors of car 2. Speaking of survivors, some of them do have a big life. A young couple near the center of **, with their infant child, was blown away with their seats and fell on the ice under the bridge. Fortunately, neither husband nor wife was seriously injured, and the child was unharmed; The battalion commander of a certain unit was also collapsed under the bridge, his arm was broken, and his first reaction was to think that the Soviet Union was at war with us, and immediately ran to the unit to understand the situation. One of the hospital's survivors knew Zheng Mouli, who was also in the forestry system, and Zheng Mouli had a conflict with Deputy Director Xing because Deputy Director Xing did not approve a contract for the sale of timber in violation of regulations, and Zheng Mouli could not get a benefit fee from it. Then the second suspect is Zheng Mouli. Survivors said that Zheng Mouli had talked with Zheng Liying and Deputy Director Xing in the car that day. In addition, the few survivors interviewed did not know what happened to the train, and some of them fell into a coma on the spot, and some flew out. However, ** analysis experts and forensic doctors all believe that Zheng Mouli is an innocent victim. Because he has his back to the ** point, and he is still about a meter away from the ** point. Ding Lao, who participated in the investigation back then, said that he admired the experts from Beijing very much. When everyone was at a loss, an expert suggested that the body of the murderer should have been blown up to the point that it was almost non-existent. 
The investigators made every effort to investigate, and sure enough, they made an unexpected discovery: they found an incomplete head of the deceased, which should have the same owner as a calf of the deceased that was originally not numbered, and a leather shoe on the calf; The expert found a piece of fabric on the damaged seat in the center of the carriage**, which was highly similar to the trouser fibers left on the leg of the deceased. The same fibers were found in the crater of the compartment floor. In the words of experts in Beijing, the fibers on that shirt are "ironclad evidence." Through the recovery of criminal investigation technology, it was determined that the deceased was about 23 years old and 1 in height67 meters, thin build, round head and beard, often engaged in outdoor work, dark complexion. When he gets into the car, he should be carrying a large bag or backpack. 
The characteristics of the suspect have become so clear that there is no one to know who he is before a large-scale investigation. The deputy director of the Huangnihe Public Security Bureau, who helped solve the case, said: "This is probably one of our road maintenance workers here, named Qiu Fengguo." "Qiu Fengguo has seven brothers, the sixth in line, nicknamed "Silly Six". He has been working in the Huangnihe Forestry Bureau for several years, and he is a quiet and ordinary road maintenance worker. The investigators asked several police dogs to smell Qiu Fengguo's leather shoes, and then found other shoes at his house, and the reaction of the police dogs showed that they were the same person; On the other hand, the first survivor visited by the investigators in the hospital knew Qiu Fengguo. The seriously injured young woman was a family member of a certain work section, and she clearly remembered Qiu Fengguo's dress that day, and she was carrying a black leatherette bag. The second seriously injured person who provided evidence was sitting in the back seat of Zheng Liying. He didn't know Zheng Liying and Qiu Fengguo, but he was very impressed by the beautiful girl Zheng Liying, and even remembered the conversation between Zheng Liying and Qiu Fengguo clearly. Zheng Liying is innocent, but she was involved in the case by accident. 
The truth is restored through the investigation of the task force and the clues provided by the survivors, "215 "The truth of the extraordinarily large ** case has finally been completely outlined. It turned out that Qiu Fengguo's motive for committing the crime was to fall out of love. He has a girlfriend Xiaobai who has been in love for three years, and he originally had a good relationship, but he didn't take the formal job in three exams, and his girlfriend was a regular worker in the forest farm, and later for various reasons, his girlfriend broke up with him. Qiu Fengguo originally wanted to drag Xiaobai to die together. Xiaobai had just gotten married, and on the day of the crime, the couple planned to take the 202nd train back to the forest farm to work, but who knew that they met an acquaintance from a certain unit on the road to drive to run errands, and sent them to the forest farm by the way. Xiaobai escaped. 
Qiu Fengguo got on the train and didn't find Xiaobai, but he stared at Zheng Liying in the No. 2 carriage. The survivor behind Zheng Liying recalled, Qiu Fengguo walked up to Zheng Liying and asked if you know me, Zheng Liying said familiar, I don't know what your name is. Qiu Fengguo said, I heard that you are about to get married, but you can't get married. Zheng Liying didn't understand and asked why. Qiu Fengguo hugged her suddenly and said the last sentence: "Because I want to fight with you!" With that, he detonated the detonator and explosives in the bag. "Fighting bones" is similar to the custom of "yin marriage" in some places. Qiu Fengguo found Zheng Liying, probably wanting to pull a beautiful girl to die with him. Later, Ding Lao said with emotion, he didn't expect the case to be so simple, "But what's wrong with the girl, you're beautiful, you go and chase it, why are you blowing up people!" "Conclusion: The criminal investigation technology in the 80s was far worse than it is now, and there was no DNA technology. Such a tricky case was solved by top criminal investigation experts in a few days. It's easy to say, but in fact the difficulties they encountered were beyond imagination. While understanding the facts of the case, the ability and sense of responsibility of those veteran criminal investigators are awe-inspiring.