Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Yang Lin stood up and projected the scene photos and investigation report onto the large screen. The clear images instantly attracted everyone's attention. "Team Leader Lu, colleagues, after expanding the investigation area, we found a tire mark on the third floor of Building 2 in the unfinished Huijia Garden building. It is 10.2 cm wide and 50.5 cm apart. It is preliminarily identified as the tire mark of a small car or SUV. A plaster sample has been taken and sent to the technical department for comparison with the vehicle model. Three black polyester fibers and some rubber fragments were extracted from the vicinity of the tire mark. The rubber fragments were preliminarily tested and confirmed to be caused by tire wear. In addition, a drag mark was found in the open space around Building 3, extending from the weeds to the entrance of Building 3. Five gray cotton fibers were extracted from the vicinity of the scratch. After testing, the fiber material and color are completely consistent with the deceased's coat."

He clicked the mouse and switched to a close-up photo of the drag marks: "Judging from the shape and fiber distribution of the drag marks, the suspect most likely dragged the body from where the vehicle was parked to the dumping point on the third floor of Building 3. During the dragging process, fibers from the deceased's coat broke off and remained around the drag marks. Combined with the clue of 'black old car' provided by Lao Zhou, we speculate that the suspect drove the black old car to transport the body to the unfinished building, parked the car, dragged the body to the dumping point, and then drove away."

"Have the vehicle model comparison results for the wheel tracks come out yet? Are there any clues about the source of the black polyester fiber?" Lu Chuan asked, tapping his fingers lightly on the table while his eyes were fixed on the wheel track photos on the big screen.

Yang Lin shook his head, his tone tinged with regret: "The tire tread pattern comparison is still in progress. The technical department reports that more time is needed to match the tire tread patterns of each vehicle model in the database one by one. The material of black polyester fiber is quite common and is mostly used in work clothes, sportswear and other clothing. We cannot determine its specific source at the moment. We need to further test the dyeing process and composition of the fiber to narrow down the scope of the investigation."

Lu Chuan nodded, gesturing for Yang Lin to sit down, then looked at Zhang Kai: "Zhang Kai, what were the autopsy results? Have you reached a clear conclusion regarding the cause and time of death?"

Zhang Kai stood up and projected the autopsy report onto the screen. The clear organ anatomy diagrams and data tables were readily apparent. "Team Leader Lu, after an overnight autopsy, the cause of death has been determined to be mechanical asphyxiation. The specific method of asphyxiation is presumed to be being covered by a soft object—we extracted gray cotton fibers consistent with the coat around the deceased's mouth and nose, and there were bleeding points on the tracheal and bronchial mucosa, as well as scattered hemorrhages and edema in the lungs, consistent with the characteristics of asphyxiation caused by 'soft object blocking the airway,' ruling out the possibility of strangulation, strangulation, or poisoning."

He paused, then continued, "Based on a comprehensive assessment of rigor mortis, livor mortis, and stomach contents, the time of death was determined to be between 7 p.m. on Tuesday and 7 a.m. on Wednesday. Furthermore, the deceased had not eaten for at least eight hours before death, consistent with the autopsy finding that the stomach was empty. In addition, there were no obvious signs of resistance on the deceased's body, suggesting that the suspect may have attacked suddenly when the deceased was off guard, or that the two knew each other and the suspect committed the crime when the deceased was relaxed."

"Have you found any further details about the old scars on the deceased? For example, what caused the scars, and could they be related to his profession?" Zhang Hui asked. As a key figure in confirming the deceased's identity, he paid special attention to the deceased's occupation.

Zhang Kai nodded in response: "The deceased had four old scars on his torso, all of which were cuts from sharp instruments. The scars had neat edges and were shallow, which is consistent with the characteristics of wounds caused by carelessness when engaging in long-term manual labor such as slaughtering and cutting. This is completely consistent with the occupation of 'pork vendor' that was later confirmed, further confirming the accuracy of the deceased's identity."

After Zhang Kai finished his report, all eyes turned to Zhang Hui. Zhang Hui took a deep breath, stood up, and projected Tian Zheng's personal information and missing person report onto the screen: "Team Leader Lu, colleagues, after checking the missing persons database overnight, we have confirmed the deceased's identity as Tian Zheng, male, 48 years old, a pork vendor at the Chengdong Vegetable Market, residing in a residential area near the market. Tian Zheng's wife, Liu Mei, reported him missing on Wednesday morning, stating that after closing his stall on Tuesday evening, Tian Zheng said he was going to meet a 'friend,' and then lost contact with her; his phone was switched off, and he had not returned home by the time the report was filed."

He clicked the mouse and switched to Tian Zheng's daily photos and social relationships chart: "According to the information provided by Liu Mei, Tian Zheng has been selling pork at the Chengdong vegetable market for 10 years. His business is stable, and his daily social circle mainly consists of vendors and regular customers in the market. However, recently, due to the increase in pork prices, Tian Zheng has had price competition conflicts with several of his peers. He also lent 5 yuan to another vendor in the market, Zhao Lei, who failed to repay the loan on time, and the two had a dispute over it. In addition, Liu Mei could not provide the specific identity of the 'friend' that Tian Zheng was going to meet on Tuesday night. She only knew that Tian Zheng would occasionally go out after closing up shop recently, and when he returned, he looked somewhat tired, but she never mentioned who he was meeting."

"Have you gotten a preliminary understanding of Zhao Lei's situation? Besides the vegetable market and home, has Tian Zheng been going to any other places recently?" Wang Shuai asked. He was in charge of visiting the area around the unfinished building and paid special attention to this kind of social relationship investigation.

Zhang Hui replied, "We have arranged for team members to go to the Chengdong vegetable market to verify Zhao Lei's identity and current situation, but we have not received any feedback yet. Tian Zheng's daily whereabouts are relatively fixed. Apart from the vegetable market and home, he mainly goes to nearby supermarkets and pharmacies, and occasionally goes to the chess and card room at the entrance of the community. However, we have not found any abnormal outing records of him recently. His 'meeting friends' behavior on Tuesday night is the only abnormal behavior in his whereabouts recently."

Lu Chuan looked at Wang Shuai and said in a calm tone, "Wang Shuai, have you found any new leads from your investigation of the area around the unfinished building? Especially information about the old black car or the person wearing a black hoodie."

Wang Shuai stood up, a hint of helplessness on his face, and spread the interview records on the table: "Team Leader Lu, we visited 5 shops, 3 villages, and 2 gathering points for scavengers around the unfinished building. Most of the interviewees said they had never seen a suspicious old black car or anyone wearing a black hoodie; only the owner of the small shop south of the unfinished building mentioned that around 8 pm on Tuesday, he saw a black car drive past in the direction of the unfinished building, but because it was dark, he couldn't see the license plate number or the car model, and he didn't pay attention to the appearance of the people inside; in addition, an elderly man who has been scavenging around the unfinished building for many years recalled that around 9 pm on Tuesday, he heard the sound of 'dragging heavy objects' coming from the direction of Building 3, but at the time he thought it was other scavengers moving scraps and didn't pay attention or check it." (End of this chapter)