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

"In addition, have Lin Xiao compile a detailed preliminary autopsy report as soon as possible and submit it to me. I will adjust the subsequent investigation plan based on this report, and have the interview and investigation team and the surveillance and investigation team focus on investigating people who match the suspect's characteristics, expand the scope of the investigation, and strive to identify the suspect as soon as possible."

"Don't worry, Captain Lu, I've already arranged for Lin Xiao to compile the preliminary autopsy report, and I've also urged the technical department to speed up the testing. I'll report any test results to you as soon as possible," Zhang Kai said.

"Okay, thank you for your hard work. Please keep me informed if there are any further developments."

"Understood, Captain Lu."

After hanging up the phone, Lu Chuan put down his pen and looked at the key information recorded in his notebook, his brow gradually relaxing. The clues discovered from the autopsy, while not directly confirming the victim's identity or cause of death, provided a clear direction for the investigation. The suspect's preliminary characteristics, the initial estimate of the time of death, and the preliminary identification of the cause of death all provided strong support for subsequent investigative work. He believed that as long as the technical department could complete all the examinations quickly and determine the victim's identity and cause of death, they could follow the clues step by step to find the murderer and solve this case of intentional homicide and body disposal.

Lu Chuan immediately convened an emergency meeting with the police officers responsible for visiting and investigating, monitoring and investigating, and comparing missing persons. He informed each police officer in detail about the autopsy findings and preliminary characteristics of the suspect reported by Zhang Kai, adjusted the investigation deployment, and clarified their respective work priorities.

"Everyone is already aware of the autopsy findings and the suspect's preliminary characteristics. Now, I'm redeploying the work. Everyone must strictly follow the requirements, implement them diligently, speed up the work, and never let any clue slip by." Lu Chuan's tone was firm, his gaze sweeping over every police officer present. "First, the investigation team should focus on investigating the four villages surrounding Zhangjiagou: Lijia Gou, Wangjia Ao, Zhaojia Po, and Sunjia Tun. Ask every household, leaving no one out. Focus on investigating individuals matching the suspect's characteristics: males aged 30 to 40, around 170 centimeters tall, with a strong build, wearing work shoes or hiking boots, who have recently exhibited unusual behavior, such as going out late at night, having suspicious injuries, having unusual odors on their clothes, or suddenly leaving the village recently and appearing flustered."

"At the same time, we asked the villagers if they had seen any strangers recently, if they had noticed anything unusual in the village, if anyone knew the deceased, and if anyone had recently had any conflicts or disputes with anyone, especially debt disputes, emotional disputes, or neighborhood conflicts. We focused on investigating people who had recently had thoughts of revenge or murder. In addition, we asked the villagers who often went up the mountain to graze their livestock or dig for mountain products if they had seen any strangers recently or noticed anything unusual in the mountains, thus expanding our sources of clues."

"Second, the surveillance and investigation team should continue to expand the scope of surveillance and investigation. It should not only investigate the small roads and intersections leading into the mountains, but also the roads in the surrounding towns, the small shops at the entrances of villages, the surveillance cameras at the doorsteps of farmers' homes, as well as the surveillance cameras of supermarkets, pharmacies, agricultural supply stores, and gas stations in the towns. It should review the footage from the past ten days, focusing on finding people who match the suspect's characteristics, black plastic bags, and motorcycles, tricycles, and off-road vehicles that can drive into the mountains, especially vehicles that have appeared around Zhangjiagou late at night recently, in order to find the suspect's whereabouts."

"Third, the missing persons comparison team should closely monitor the progress of the DNA testing by the technical department. Once the technical department provides the DNA profile of the deceased, it should be immediately entered into the national DNA database and compared with all recent information on male missing persons. Special attention should be paid to comparing information on missing persons in the four villages surrounding Zhangjiagou, especially male missing persons who have recently gone missing, are between 30 and 50 years old, and whose height and build are consistent with the preliminary assessment of the deceased, so as to determine the identity of the deceased as soon as possible."

"Fourth, the physical evidence examination liaison team should closely coordinate with the technical department and urge them to speed up the progress of toxicology testing, clothing fiber testing, jewelry residue testing, and footprint comparison. Any test results should be reported immediately to provide clues for the case investigation. In particular, toxicology testing should be conducted as soon as possible to determine whether the deceased died from poisoning and what type of poison it was, in order to provide support for identifying the suspect."

"Fifth, Zhang Baolu's team will continue to question Zhang Baolu further, asking him to recall the details of the stranger more carefully, such as the man's accent, whether he had tattoos on his arms, the way he carried the bag, the specific weather and surrounding environment when he saw the man that day. No detail should be overlooked, and we should try to obtain more clues about the suspect."

"Did everyone hear me clearly?"

"Understood, Captain Lu!" all the police officers responded in unison, their voices loud and clear, full of fighting spirit.

"Alright, now, let's get moving. Everyone, do your job and speed things up. Report any discoveries immediately, without concealment or delay!"

With Lu Chuan's order, all the police officers once again threw themselves into the intense investigation, conducting door-to-door inquiries, surveillance checks, and comparisons with missing persons. All tasks were carried out in an orderly manner, and everyone was going all out to find clues, identify the deceased, and lock down the suspect as soon as possible.

Time passed slowly, and evening arrived in the blink of an eye. All investigative work proceeded in a tense but orderly manner, yet without significant breakthroughs. The door-to-door investigation team conducted preliminary investigations in the villages surrounding Zhangjiagou, finding no individuals matching the suspect's characteristics or exhibiting unusual behavior, nor any villagers having seen the stranger, and no valuable clues were found. The surveillance investigation team reviewed a large amount of CCTV footage; due to the scarcity of surveillance in the mountains, most cameras were installed in front of farmers' homes, resulting in blurry image quality, and no individuals or vehicles matching the suspect's characteristics were found. The missing persons comparison team was still awaiting the DNA test results from the technical department. Regarding physical evidence examination, clothing fiber testing and jewelry residue testing were still underway, with no preliminary results yet; only toxicology testing yielded some initial findings.

Around 6 PM, Zhang Kai received a call from the forensic department. The officer there spoke urgently, "Forensic Doctor Zhang, we have preliminary results from the toxicology test. We detected organophosphate poisoning residue in the deceased's bodily fluids, liver tissue samples, and tissue samples around the needle mark on his left ankle. The concentration was high enough to cause death. This organophosphate poisoning is consistent with the poison found in the pesticide bottle containing the dark blue plastic fragment we retrieved at the crime scene. We've confirmed that the deceased died from organophosphate poisoning. The needle mark on his left ankle is the trace left by the perpetrator who injected the victim with organophosphate poisoning, leading to his death." (End of Chapter)