One morning, Ah Dong and Old Li went up the mountain to run, suddenly saw what seemed to be something in the grass next to them, looked closer, the two people were scared enough, and soon, the police rushed to the scene Old Li told Liang Team Zi

One morning, Ah Dong and Old Li went up the mountain to run, suddenly saw what seemed to be something in the grass next to them, looked closer, the two were scared enough, and soon, the police arrived at the scene

Old Li told the Liang team that his name was Li Zhaohui, teaching at a nearby university, and every weekend he would run with his friend Zheng Xiaodong, the Liang team asked whether the two knew the deceased, the old Li denied not knowing, the Liang team asked again, did they see suspicious people passing by, Zheng Xiaodong was very sure that they had been staying here after calling the police, and did not see other people

After forensic examination, the time of death should be at 11 to 12 o'clock last night, the deceased's hands were tied behind his back, it was obvious that he had been violated, but last night there was a heavy rain, what evidence traces may be contaminated, even the fingerprints on the mineral water bottle next to the body may have been washed away, at this time, the captain found the bottle cap covered by the backpack bag, the police brought all the evidence back to the police station, the forensic doctor found that the deceased did suffer a brutal violation before death, but the bodily fluids collected from the deceased have been destroyed by the murderer with bleach, Can not detect, and at the same time detected that the murderer's bodily fluids are not green, the forensic doctor judged that this situation will occur, either born, or have had a ligation operation, fortunately, in the sky is the end of the road, from the bottle cap brought back to detect the DNA, through the DNA database comparison, found and a habitual offender Zhang Yongping's record coincided

This Zhang Yongping began to commit indecent crimes at the age of 15, 25 years old committed two rape cases, sentenced to ten years, recently just released, the police quickly found Zhang Yongping, found that he did not change his heart, in the face of the police's questioning, Zhang Yongping admitted that he did go to the crime scene that day, but he just went to climb the mountain, and the bottle was also thrown casually, and did not kill, the police searched Zhang Yongping's house, found a large box of colored CDs, and also found bleach and a bunch of women's underwear, it seems that this Zhang Yongping's suspicion is really big, The police took him back to the police station, but strangely, after testing, Zhang Yongping's bodily fluids contained Qingzi, which means that he was not the one who violated the female deceased

At this time the captain suddenly thought of a little, when the female deceased was found, there was a piece of clothing that was stained by hair dye, according to this clue, the captain found a man named Wang David, just he opened a hairstyle house, the police found the same color hair dye as the deceased's clothes in a corner, Wang David tried to cover up in some panic, but accidentally exposed the wound on his hand, he defended that he was injured by a hair fork, but the captain saw at a glance that it was a scratch, the police took him back to the police station, after the test, Found that Wang David really did not have Qingzi in the body fluids, it turned out that two years ago, Wang David and his wife had a ligature operation after giving birth to a child, but even in the face of police evidence, Wang David always insisted that he did not kill, he admitted that he and the deceased did have a relationship between men and women, after the hair salon closed that night, he was cleaning up the hair dye, the deceased suddenly broke in, angrily accused Wang David of not acknowledging the account after playing, and also took out the phone to threaten to tell him the relationship between the two, when the wife grabbed the phone, the deceased's clothes were stained with hair dye, Wang David's hand was also scratched, and Wang David said that after the two calmed down, the deceased left, and he never saw her again, but this was only a side of Wang David's words. At this time, Wang David's wife found the police station, she was specially to deliver medicine, the forensic doctor took a look, is a kind of antibiotic used to treat urethritis, the forensic doctor will tell the captain of this discovery, this antibiotic can inhibit urethritis, usually urethritis can be transmitted to women through contact, but the forensic doctor tested that Wang David's bodily fluids did have urethritis inside, and the body fluid samples in the deceased's body did not, usually the course of treatment for urethritis is about five days, find Wang David's doctor, he said, Wang David has been ill two years before the crime, That is to say, if he is really the murderer, then the body fluid sample in the female deceased's body should have urethritis, so that Wang David can be excluded, neither Zhang Yongping, nor Wang David, who is the murderer

At this moment, the assistant rushed into the office, anxiously saying that Zhang Ji was in trouble again, and the Liang team rushed over to know that Zhang Ji had been found stealing over Zheng Xiaodong's garbage, and zheng Xiaodong had also picked up the police card and returned to the police station, and the captain angrily asked, Why did Zhang Ji go over Zheng Xiaodong's garbage? But Zhang Ji flashed his words, unwilling to say the reason, which made the Liang team intolerable, decided to transfer him, at night, Zhang Ji found the Liang team again, he told the Liang team that the reason why he went to turn over Zheng Xiaodong's garbage was because he knew that the murderer of the rape and murder case was Zheng Xiaodong, the Liang team had some doubts, Zhang Ji went on to say that 14 years ago, Zheng Xiaodong also designed a rape and murder case, at that time, the victim also did not leave any clues, but fortunately found an eyewitness in the village near the crime, and the villagers recognized Zheng Xiaodong and his license plate. But the day before the trial, the villagers were hit by a car, and Zheng Xiaodong was also acquitted, soon after, he went to the United States, this case also became a thorn in Zhang Ji's heart, and soon through contact with Interpol, it was found that Zheng Xiaodong had eight rape and murder cases with similar methods near his place of residence during his time in the United States, and the victims were all Chinese, and the captain also found that Zheng Xiaodong's selection of targets had a common point, that is, there was a mole in the corner of his eye, and this was also related to his childhood experience, when Zheng Xiaodong was seven years old, because his father had an affair. The mistress found the family to make trouble, and the angry mother killed the mistress in anger, and then the father killed his mother in front of Zheng Xiaodong. This woman caused Zheng Xiaodong's family to be destroyed, causing great trauma to his psychology, so Zheng Xiaodong hated this woman, and this woman had a mole in the corner of her eye, so Zheng Xiaodong saw a person with a mole in the corner of her eye, she would be stimulated to kill the machine, mastered this law, the police immediately found a female policeman with a mole in the corner of the eye to approach Zheng Xiaodong, and sure enough, Zheng Xiaodong was hooked, and Zheng Xiaodong was arrested that night

This is the storyline of the movie Forensic Pioneer