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

Subsequently, Lu Chuan deployed the follow-up investigation work: "First, arrange for team members to conduct a comprehensive review of surveillance footage around the construction site, including surveillance cameras around the construction site fence and along Jianshe Road, focusing on suspicious persons and vehicles passing through the area between 12:00 and 15:00 before and after the incident, to find the activity trajectory of the deceased and the suspect; Second, arrange for team members to conduct door-to-door visits and investigations in residential areas, shops, internet cafes, hotels, and other places around Jianshe Road in the south of the city, asking nearby residents if they have seen the deceased or discovered any suspicious persons or abnormal situations; Third, compile the deceased's physical characteristics and clothing information, issue a notice for assistance in the investigation, and search for the deceased's identity throughout the city, while also contacting missing persons authorities." The population registration department should compare information with missing persons records to confirm the deceased's identity as soon as possible; fourth, the technical department should expedite the examination and comparison of trace evidence collected at the scene, focusing on comparing suspicious fingerprints with those of construction workers, analyzing the material and origin of fibers, and examining the composition of metal fragments and dust samples to obtain test results as quickly as possible; fifth, team members should be assigned to comprehensively review the site's entry and exit registers, contacting all registered personnel to verify their identities and activity trajectories, and eliminating any suspicion of unrelated individuals; sixth, control over the construction site should be strengthened, prohibiting unauthorized personnel from entering, protecting the scene to prevent the destruction of traces, and requiring construction workers not to leave the city at will and to cooperate with the police investigation at any time.

"Understood, Captain Lu!" all the team members responded in unison, and then immediately began the follow-up reconnaissance work according to Lu Chuan's plan.

At this time, Yang Lin and Yang Sen had returned to the Criminal Investigation Detachment laboratory and began examining and comparing the trace evidence collected at the scene. They first processed the seven suspicious fingerprints, entering the fingerprint samples into the AFIS (Automatic Fingerprint Identification System) and comparing them one by one with the fingerprint samples of the construction workers at the site, while also comparing them with fingerprint information in the database to find matching fingerprints. Next, they examined the extracted fiber samples, observing the morphology and structure of the fibers under a microscope, analyzing the fiber material, and determining the origin of the fibers. For the metal fragments and dust samples, they would conduct compositional analysis to determine the material and purpose of the metal fragments, and analyze the composition of the dust samples to look for clues related to the suspect.

At the construction site, Lu Chuan remained, his expression grave as he surveyed the cordoned-off area. He knew that this murder occurred at a complex subway construction site, where evidence could easily be destroyed, the victim's identity was unknown, and there were no direct leads pointing to the suspect, making the investigation extremely difficult. However, he remained steadfast in his determination to solve the case. He believed that by carefully examining every detail, meticulously analyzing every piece of evidence, and expanding the scope of the investigation, he would surely find the suspect, uncover the truth, and bring justice to the deceased.

As the sun gradually set and night began to fall, the construction site of the subway line on Jianshe Road in the south of the city remained brightly lit. The investigators were still busy at work; some were reviewing surveillance footage, some were interviewing residents in the surrounding area, and some were organizing case materials. Everyone was giving their all to solve this murder case. The police cordon at the scene stood out prominently under the lights, not only protecting the traces and evidence but also bearing the responsibility and commitment of the police in solving the case and upholding justice.

As of now, the investigation is ongoing. The victim's identity has not yet been confirmed, the suspect has not been identified, and the examination and comparison of fingerprints, fibers, and other trace evidence collected at the scene are still underway. However, the members of the Dongcheng Criminal Investigation Detachment have not wavered in the slightest. They will maintain a rigorous and meticulous work attitude, going all out to overcome difficulties, leaving no detail overlooked, and not missing any clues, resolutely bringing the suspect to justice, restoring justice to the deceased, and upholding social fairness and justice.

In the subsequent investigation, the team will focus on the following aspects: First, speed up the examination and comparison of trace evidence to quickly identify the owner of suspicious fingerprints and clarify the source of fibers and metal fragments; second, expand the scope of surveillance and investigation to all surveillance cameras around Jianshe Road to find the activity trajectories of the deceased and the suspect; third, intensify door-to-door visits and investigations, going deep into surrounding residential areas, shops, internet cafes, and other places to collect clues extensively; fourth, continue to advance the work of confirming the identity of the deceased, and as soon as possible as possible to ascertain the identity of the deceased through methods such as notification of assistance and comparison with missing persons, so as to provide direction for solving the case; fifth, conduct a comprehensive verification of all personnel entering and leaving the construction site, eliminate suspects one by one, and identify key targets for investigation.

Although the case investigation currently faces numerous difficulties, Lu Chuan and his team firmly believe that as long as they adhere to evidence as the core, crime scene investigation as the foundation, and investigation and interviews as the means, they will definitely be able to break through the bottlenecks, find the suspects, and uncover the truth. They will remain steadfast in their posts, fulfill their duties, and demonstrate the loyalty and responsibility of public security police officers with their professionalism and perseverance. They will safeguard the lives and property of the people with practical actions, ensuring that justice is served and that evil has nowhere to hide.

As night deepened, the lights at the subway construction site on Jianshe Road in the south of the city remained glaring. Lu Chuan stood by the cordon, watching his team members working diligently, his brow furrowed. He took out his phone and dialed Wang Shuai's number, his tone serious and firm: "Wang Shuai, you immediately lead the investigation team to conduct a comprehensive investigation of the area surrounding the crime scene, focusing on checking all surveillance cameras, including those along Jianshe Road, around the construction site fence, in surrounding residential areas, shops, internet cafes, and hotels. Be sure to carefully review the surveillance footage from 12:00 to 15:00 before and after the incident, searching for the movements of the deceased and suspicious persons. No detail of abnormality can be overlooked. At the same time, arrange for team members to conduct door-to-door visits to residents in surrounding shops and residential areas overnight, asking them if they have seen the deceased, seen any suspicious persons or vehicles, or heard any unusual sounds. Make sure to achieve full coverage without blind spots, and do not miss any clues."

"Understood, Captain Lu! I'll lead the team out immediately and do everything in my power to find useful clues." Wang Shuai's voice was full of energy on the other end of the phone. Although he had been working continuously for several hours and was exhausted, he didn't slack off at all. He immediately gathered the investigation team members, clearly divided the tasks, and split them into two groups: one group was responsible for checking surveillance footage, and the other for interviewing residents, quickly getting to work. (End of Chapter)