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

At the case summary meeting, Lu Chuan said, "Based on the on-site investigation and physical evidence, we conducted thorough investigations and uncovered clues at every level, and finally identified the suspect. This fully demonstrates that as long as we adhere to the people-centered development philosophy and maintain a rigorous and meticulous work attitude, there is no case that cannot be solved and no murderer that cannot be caught."

Zhang Hui and his team sat in the audience, their faces showing tired yet gratified smiles. The investigation of this case was fraught with twists and turns, from the initial uncertainty about the victim's identity to multiple setbacks in the leads, and finally to the identification of the suspect. They poured countless hours of effort and sweat into it. But when the truth was revealed, all their fatigue vanished. Through their actions, they brought justice to the deceased and upheld fairness and justice in society.

After learning that the murderer had been apprehended, Tang Hu's parents traveled from Qinghe County to the city's Criminal Investigation Detachment to express their gratitude to Zhang Hui and his team. "Thank you, officers, thank you for getting justice for our Xiaohu," Tang Hu's mother said, sobbing uncontrollably as she held Zhang Hui's hand. Zhang Hui comforted her, "Auntie, don't be sad. This is what we should do. The murderer has been brought to justice and will be severely punished by law."

After the case was solved, the work of the Criminal Investigation Detachment returned to normal, but the investigators did not let their guard down.

Less than a week later, the Criminal Investigation Division received another report that a taxi driver had been murdered.

At 5:20 a.m., just as dawn was breaking and the city was still shrouded in tranquility, sanitation worker Li Chen had already begun his day's street sweeping work, pushing his cleaning cart. When he reached a spot about 50 meters west of the intersection of Binhe West Road and Chaoyang North Road in the Chengbei District, he caught a glimpse of a green taxi parked diagonally on the roadside. Half of the vehicle was on the sidewalk, and the other half was parked in the non-motorized vehicle lane. The headlights were off, and the doors were closed, which looked rather unusual.

"There are rarely taxis parked here at this time. Could the driver be asleep?" Li Chen wondered to himself. He approached the taxi window and knocked, but there was no response. He peered through the window and saw a man sitting in the driver's seat, his head tilted to one side, eyes closed, hands on the steering wheel, motionless. Li Chen's heart skipped a beat; a sense of foreboding washed over him. He tried to pull the door open, but to his surprise, it wasn't locked and opened easily.

A faint smell of blood mixed with tobacco wafted towards him. Li Chen peered over and saw a dark stain on the man's chest, his clothes soaked through, his face as pale as paper, and he was already lifeless. "A dead man!" Li Chen was terrified, stumbling back several steps, almost falling to the ground. He steadied himself, trembling as he pulled his phone from his pocket and dialed 110: "Hello... Officer, at the intersection of Binhe West Road and Chaoyang North Road, there's a taxi... the driver seems to be dead!"

After receiving the report, the city's Criminal Investigation Detachment's Chief Lu Chuan immediately led his investigation team to the scene, accompanied by technicians Yang Lin and Yang Sen, who were in charge of the crime scene investigation, and several other investigators. At 6:00 AM, the police car arrived at the scene, where several early-rising passersby had already gathered, discussing the incident. Upon getting out of the car, Lu Chuan immediately issued instructions: "First team, immediately set up a cordon, seal off the scene, and prohibit unauthorized personnel from entering; second team, conduct a detailed interview with the complainant, Li Chen, recording the time and circumstances of the discovery of the body and the original state of the scene; Yang Lin and Yang Sen, carrying forensic equipment, immediately conduct a comprehensive investigation of the scene, focusing on the inside and outside of the taxi, collecting trace evidence, ensuring meticulous attention to detail, and leaving no detail overlooked."

Yang Lin and Yang Sen quickly donned their investigation suits, shoe covers, gloves, and masks, slung their heavy investigation kits over their shoulders, and hurried towards the taxi. The kits contained neatly arranged specialized equipment such as fingerprint scanners, magnetic powder, fluorescent powder, tweezers, evidence bags, measuring tapes, trace extraction tape, fiber adhesive, multi-band light sources, electrostatic adsorption devices, and crime scene investigation lights. The two first conducted an overall survey of the scene, drew a location map, and marked the taxi's parking position, the surrounding environment, and the perimeter of the cordon.

"The scene is located 50 meters west of the intersection of Binhe West Road and Chaoyang North Road in the Chengbei District, at the junction of the non-motorized vehicle lane and the pedestrian walkway. The surrounding area consists of residential areas and small shops, none of which are open for business yet. The taxi is a green Jetta with license plate number 京A·8X726. There are no obvious signs of impact on the vehicle, and the windows are intact with no signs of prying." Yang Lin explained the basic situation of the scene to Yang Sen while shining an investigation light on the taxi. "Our initial assessment is that this may be the primary crime scene, but we cannot rule out the possibility of the body being moved. Further investigation is needed to confirm this."

The two decided to conduct a thorough inspection of the taxi's exterior first. Yang Lin crouched down and carefully examined the taxi's four door handles: "The driver's side door handle, the passenger side door handle, and the right rear door handle all have obvious touch marks, requiring fingerprint samples to be collected." He took out black magnetic powder and a fingerprint brush, lightly dipped a small amount of powder, and brushed it onto the door handles. Soon, several clear fingerprints appeared on the driver's side door handle. Yang Lin immediately used fingerprint extraction tape to extract the fingerprints, marking them as "Fingerprint Sample No. 1 at the scene." Two fingerprint samples were also extracted from the passenger side door handle and one from the right rear door handle, marking them as "Fingerprint Samples No. 2 and No. 3 at the scene."

Yang Sen was responsible for inspecting the taxi's tires and undercarriage: "The tires are Michelin, with clear tread patterns and moderate wear, and no abnormal attachment marks were found; there were no drag marks on the undercarriage, ruling out the possibility that the vehicle was dragged here." He used a fiber adhesive extractor to collect a trace sample from the tire surface, marking it as "Site Trace Sample No. 1," and then used an inspection light to illuminate the gaps in the vehicle body, finding no suspicious traces such as blood or hair.

In the taxi's trunk, Yang Lin noticed something unusual: "There were slight scratches on the trunk latch, as if it had been pried open with a key or other hard object, but the lock cylinder was intact, showing no signs of forced entry." He shone a multi-band light source on the latch, revealing several blurry fingerprints. Because the fingerprints were too blurry to be extracted directly, he had to use a high-resolution camera to take photos from multiple angles, labeling them "Fingerprint Sample No. 4 (Blurry)." Yang Lin then opened the trunk with the key. Inside, a spare tire, a jack, and some repair tools were neatly arranged. No suspicious items were found, and there were no traces of blood, hair, or other evidence. (End of Chapter)