ebookland Chapter 1423 Comparative Analysis and Examination
Chapter 1423 Comparative Analysis and Examination
Xiao Yang and Xiao Sun first conducted a static observation and record of the suitcase floating on the water. The suitcase was a black hard-sided rolling suitcase, approximately 60x40x25 cm in size. The brand logo was blurred, and the surface of the suitcase had multiple scratches and impact marks. Some areas were covered with green seaweed and brown silt. The suitcase had a two-way zipper; the left zipper pull was closed, while the right zipper pull was slightly damaged, resulting in a gap of about 5 cm in the suitcase, consistent with the description given by the complainant, Zhou Guiying.
"Secure the suitcase's position first, then proceed with the retrieval," Xiao Yang instructed the water rescue team. Two bamboo poles were inserted into the water from both sides of the suitcase to stabilize it and prevent it from tipping over or shifting during the retrieval process. Then, the rescue team used a specially made retrieval net to gently lift the suitcase from the bottom and steadily transfer it to a waterproof mat on the waterfront platform. The entire retrieval process was video recorded, and Xiao Yang took photos of the suitcase's original state from different angles.
After placing the suitcase stably, the two began a detailed examination. Xiao Yang used a multi-band light source to illuminate the surface of the suitcase, searching for fingerprints. Several blurry fingerprints were found on the front and sides of the suitcase; the fingerprint patterns were not clear due to the rough surface and the presence of water stains and mud. Xiao Yang first gently wiped away the mud and water stains on the surface of the suitcase with a clean cotton swab, being careful not to damage the fingerprints, and then used black magnetic powder and a boar bristle brush to reveal them. After several attempts, a relatively clear fingerprint was finally extracted from the front of the suitcase: "Core fingerprint number 1, left in the central area of the front of the suitcase, preliminarily identified as a thumb fingerprint, with certain identifiable features, suitable for comparison."
Xiao Sun then used a fiber extractor to collect fiber samples from the surface of the container: "Core fiber sample No. 1 yielded three types of fibers: black, white, and green. The black fibers are consistent with the characteristics of the black fibers extracted from the third-level area, the green fibers are suspected to be aquatic plant fibers, and the white fibers are consistent with the characteristics of the white fibers wrapped on the nylon rope in the second-level area." At the same time, he also collected silt samples and aquatic plant samples from the surface of the container, preparing to compare their composition with the silt at the bottom of the lake later.
"Now open the suitcase, be gentle and avoid damaging the contents." Xiao Yang gestured for Xiao Sun to prepare to record and take photos, then carefully used tweezers to pry open the damaged zipper pull, slowly opening the suitcase. The moment the suitcase opened, a strong, nauseating smell of blood and decay filled the air. The two men endured the discomfort and continued their work.
The suitcase was lined with a black velvet fabric, which was soaked through with student records and showed signs of sticking together in some areas. Inside were several human remains, totaling six pieces: one head, one torso, two upper limbs, and two lower limbs. All the remains were wrapped in white plastic bags, some of which were torn, with blood seeping through and staining the lining. The cut surfaces of the remains were relatively clean, suggesting they were formed by a sharp object.
"First, record the original placement of the items inside the suitcase, then extract the fragments one by one." Xiao Yang took a picture of the entire interior of the suitcase with his camera, and then numbered and marked the placement of each fragment in the order of "from top to bottom and from left to right." Xiao Sun then used a tape measure to measure the size of each fragment and recorded it in the investigation record.
Using sterile tweezers and scissors, the two carefully opened the white plastic bag containing the human remains and examined the surface of each piece. In the hair of the head remains, a small amount of white fibers was found, consistent with the characteristics of white fibers on the box lining and nylon rope. On the skin surface of the upper limb remains, a shallow scratch with irregular edges was found, presumably formed before or after death. In the clothing fragments of the lower limb remains, black and gray fibers were extracted and labeled "Core Fiber Samples No. 2 and No. 3".
"A small amount of silt adhered to the surface of the fragment, similar to the silt on the surface of the suitcase and the bottom of the lake, indicating that lake water seeped in after the suitcase entered the water, causing the silt to adhere to the fragment." Xiao Yang used a cotton swab to extract a silt sample from the surface of the fragment and sealed it together with the silt sample from the surface of the suitcase. At the same time, he also found a small number of tiny metal fragments at the bottom of the suitcase, speculating that they were parts that fell off after the suitcase was damaged, or remnants of tools left behind by the suspect, and immediately extracted and sealed them.
While the interior of the suitcase was being examined, the underwater salvage operation was also underway. After nearly an hour of meticulous searching, the rescue team retrieved a bloodstained stainless steel kitchen knife and a torn white plastic bag from the lakebed approximately 3 meters southeast of where the suitcase had been floating. The knife was about 30 centimeters long and had a blade about 8 centimeters wide. The blade showed obvious cutting marks and bloodstains. The handle was made of black plastic with a few fingerprints on its surface. The torn white plastic bag was made of the same material as the plastic bag that had wrapped the human remains.
Xiao Yang and Xiao Sun immediately examined the retrieved kitchen knife and plastic bag. Xiao Yang used fluorescent powder to develop the knife handle and extracted a clear fingerprint: "Fingerprint No. 2, left in the middle of the knife handle, with clear lines, meets the comparison criteria, and is different from the fingerprint No. 1 extracted from the surface of the box." Xiao Sun then used a fiber extractor to extract fiber samples from the knife blade and body, finding black and gray fibers consistent with the remaining fragments of clothing, as well as white fibers consistent with the surface of the box.
一级勘查区域的勘查工作极为细致，每一个环节都反复确认，避免遗漏。两人共提取指纹2枚、足迹样本2枚、纤维样本5份、尼龙绳1段、烟蒂1枚、菜刀1把、塑料袋2块、淤泥样本3份、水草样本1份、金属碎片1份、油漆样本1份、微量物质样本1份，拍摄照片286张，录制视频58分钟。整个一级勘查过程持续了3小时20分钟，直到中午12时50分才基本结束。
Subsequently, the two entered the "re-examination area" to conduct a second review of the previously explored Level 3, Level 2, and Level 1 areas, focusing on checking for any missed traces or physical evidence and verifying the location and characteristics of the extracted traces. In the green belt of the Level 2 examination area, Xiao Yang extracted a small amount of tobacco fragments consistent with the brand of cigarette butts; in the silt at the bottom of the lake in the Level 1 examination area, a small amount of white fiber samples were extracted, consistent with the fiber characteristics of the plastic bag that wrapped the fragments.
At 1:10 PM, the on-site investigation was completed. Xiao Yang and Xiao Sun categorized and organized all the collected trace evidence, filling out a detailed evidence list noting the time, location, characteristics, and quantity of each piece of evidence to ensure its traceability. They then reported the investigation results to Li Ming.