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

Zhang Kai nodded and then examined the abdominal organs. There was no blood or fluid accumulation in the abdominal cavity; the peritoneum was smooth; all organs were in their normal positions, with no signs of rupture or perforation. The liver was of normal size, weighing approximately 1500 grams, dark red in color, with a smooth surface and clear cut surface structure. There were no signs of cirrhosis, tumors, abscesses, or other lesions, and no foreign bodies remained in the liver parenchyma. The spleen weighed approximately 180 grams, was normal in shape, soft in texture, and showed no bleeding or infarction foci on the cut surface. The stomach was empty, with only a small amount of mucus remaining. The gastric mucosa was smooth, without congestion, edema, or ulcers, indicating that the deceased had not eaten for at least 8 hours before death. Based on the time of death, the last meal was estimated to have been around noon three days before the incident.

“An empty stomach helps us further narrow down the timeframe for death,” Zhang Kai said. “In addition, examination of the gastrointestinal contents revealed no residual toxic or harmful substances. Further toxicological testing of the gastric mucosa, blood, and liver tissue is needed to rule out poisoning. The kidneys are normal in morphology, with a clear boundary between the cortex and medulla, and no stones, tumors, or inflammatory lesions; kidney function is normal. The pancreas and gallbladder are normal, the intestinal mucosa is smooth, and there is no bleeding or necrosis. All organs show no organic lesions, ruling out the possibility of death due to disease.”

Subsequently, the two examined the urinary and reproductive systems. The kidneys weighed approximately 250 grams each; the ureters were patent, without stones or obstruction; the bladder was empty, the mucosa smooth, and there was no bleeding or inflammation. The reproductive system showed no abnormalities, no signs of trauma or lesions, and no distinctive markers that could identify the deceased, such as tattoos, surgical scars, or implants.

Next was the autopsy of the limbs. The deceased's limbs showed no fractures or dislocations, and joint movement was normal. After rigor mortis subsided, the muscle tissue of the limbs was dark red, with no bleeding or necrosis. Small amounts of dust and fibers were found under the fingernails and toenails; these were extracted, sealed, and sent to the technical department for examination to check for any traces of the perpetrator. Fingers and toes showed no missing or deformed parts, no bite marks, and no signs of binding. There were no obvious calluses on the palms or soles, only a few thin calluses on the inner sides of the palms. Combined with the high concentrations of lead and mercury in the deceased's hair, this further suggests that the deceased may have engaged in manual labor involving heavy metals, but the intensity of the labor was not extremely high.

“Teacher Zhang, there were no external injuries on the limbs, and no signs of binding or resistance, which means that the deceased's hands may not have been able to effectively resist when attacked. Either the perpetrator attacked extremely quickly, or the deceased was familiar with the perpetrator and was completely unprepared,” Xiao Lin said while arranging the autopsy instruments. “In addition, we did not find any identification documents, special ornaments, or markings on the deceased's clothing pockets or body surface, so we cannot determine the deceased's identity based on physical characteristics.”

Zhang Kai remained silent, focusing instead on a further examination of the tissue surrounding the wound. Using a microscope, he observed the skin tissue at the edges of the neck wound and discovered a small amount of epithelial tissue hyperplasia. Combined with the rigor mortis and livor mortis, he further confirmed that the time of death was between 8 PM and 10 PM three days prior to the incident. This coincided with the time the suspect entered the logistics park around 10 PM as seen in the surveillance footage, indicating that the perpetrator committed the crime shortly after entering the logistics park.

"Xiao Lin, take three samples each of muscle tissue and blood vessel tissue from around the neck wound and send them to the pathology department for histopathological examination to confirm the extent of the injury and the time of bleeding. At the same time, take blood, liver, and gastric mucosa samples for toxicology and DNA testing, and take hair samples for quantitative analysis of trace elements to further clarify the deceased's occupational characteristics," Zhang Kai instructed. "In addition, conduct a comprehensive examination of the deceased's clothing, especially the seams and linings, to check for any hidden identity information, receipts, letters, etc. Also, extract stains and fibers from the clothing and compare them with samples collected at the scene."

Xiao Lin immediately followed instructions, numbering, packaging, and labeling each of the extracted samples, and meticulously recording the sample name, extraction location, and extraction time to ensure traceability. "Teacher Zhang, the clothing inspection is complete. The outer jacket is a plain blue cotton work uniform with no brand markings. The clothing is severely worn, with obvious patches on the cuffs and elbows, indicating the deceased's modest economic situation. The underwear is made of synthetic fibers and also has no brand information. The stains on the clothing are mainly oil and dust, with a small amount of dark red blood. Preliminary testing indicates the bloodstains belong to the deceased, with no other bloodstains found."

Zhang Kai took the clothes from Xiao Lin and carefully examined the stitching at the patch: "The stitching is rough, indicating that the deceased sewed it himself, further confirming that the deceased had limited financial means and may have been engaged in manual labor for a long time, causing the clothes to wear out quickly. In addition, the fibers extracted from the clothes are consistent with the black fibers extracted from the floor of the passageway and the gaps in the conveyor belt at the scene. They are all made of wool and polyester blend, indicating that these fibers most likely came from the murderer, rather than from the deceased's clothes."

By this time, the autopsy had been underway for nearly four hours, and the various examinations and sample collection were basically complete. Zhang Kai asked Xiao Lin to clean and disinfect the autopsy table and organize the autopsy records, while he himself reviewed the anatomical atlas and preliminary test data, re-examining the suspicious points in the case. "Xiao Lin, summarize the current autopsy findings and share your thoughts," Zhang Kai said.

Xiaolin put down her work, opened the autopsy record, and said methodically, "Okay, Teacher Zhang. The deceased was a male aged 34 to 36, 175.3 cm tall, weighing 62 kg, with average economic conditions. He had long been engaged in manual labor involving heavy metals. The concentration of lead and mercury in his hair exceeded the standard, and his clothes were heavily stained with oil. The cause of death was clearly a single-edged sharp instrument cutting his neck, resulting in the rupture of the common carotid artery and internal jugular vein, leading to hemorrhagic shock. The time of death was precisely between 8 pm and 10 pm three days before the incident. The location of death was most likely an abandoned factory building on the west side of the Oriental Logistics Park. The deceased had not been moved in a short period of time after his death, and the scene was the primary crime scene."

"Regarding the perpetrator's modus operandi, the perpetrator used a single-edged sharp weapon in their right hand, applying force from left to right, and acted quickly, catching the victim off guard and unable to effectively resist. The perpetrator demonstrated some counter-investigation awareness, cleaning up bloodstains at the scene after the crime, possibly removing any traces of their own, but without completely destroying the wounds or physical evidence. The victim and the perpetrator may have known each other, or the perpetrator may have targeted the victim, luring them to the abandoned factory before attacking them," Kobayashi continued. "However, the autopsy has not yet revealed any crucial clues to identify the victim: no identification, no special markings, no implants, and no direct clues pointing to the suspect. There were no foreign objects in the wounds, no DNA from the clothing or body surface, and no traces of a special weapon. Only a fiber sample confirmed that the perpetrator may have been wearing a wool-polyester blend coat, which corresponds to the results of the scene investigation and technical examination, but it cannot further narrow down the scope of the investigation." (End of Chapter)