Phi-Fic Chapter 1449 Regression Calculation, Autopsy Report Released
Chapter 1449 Regression Calculation, Autopsy Report Released
“We’ll measure the length of the limb bones and then estimate the height based on the regression equation between the limb bone length and height,” Zhang Lin said. Xiao Lin immediately picked up a measuring tape and measured the deceased’s femur, tibia, humerus, ulna, and other limb bones: “Femur length 45 cm, tibia length 38 cm, humerus length 30 cm, ulna length 25 cm.”
Based on the measurement data, Zhang Lin substituted the values into the regression equation to calculate: "According to the regression equation of male limb bone length and height, height = 64.39 + 2.31 x femur length + 1.45 x tibia length + 1.22 x humerus length + 0.98 x ulna length, the calculated height is approximately 178.5 cm." He then measured the weight of each body part and added them together to estimate the body weight: "The total weight of all body parts is approximately 65 kg. Adding the possible loss of a small amount of tissue, the deceased's weight is approximately 71 kg."
In addition, Zhang Lin also discovered some other characteristics during the autopsy: "The deceased's teeth showed obvious tetracycline staining, indicating that the deceased had taken tetracycline antibiotics for a long period of time during childhood. There were old fracture marks on the left index finger, and although the fracture had healed, there was obvious deformity, indicating that the deceased's left index finger had been seriously injured. These characteristics can provide important evidence for determining the identity of the deceased."
At 10:00 AM, the detailed autopsy report was finally completed. Zhang Lin carefully organized the report and then took it to the Criminal Investigation Division's conference room to report the autopsy results to Li Ming and the other investigators. The conference room was already full; Li Ming, Xiao Yang, Xiao Sun, and the heads of each group were all waiting for the autopsy report.
"Zhang Lin, what are the autopsy results? Have the time and cause of death been determined?" Li Ming asked immediately when he saw Zhang Lin enter. Zhang Lin nodded, placed the autopsy report on the table, and said, "Captain Li, everyone, after a detailed autopsy and examination using various methods, we have determined the deceased's time of death, cause of death, and basic information."
He opened the autopsy report and began to give a detailed report: "The deceased was an adult male, around 40 years old, 178.5 cm tall, and weighing 71 kg. The time of death was determined to be approximately 48 hours before the incident, that is, between 10 p.m. on October 25 and 2 a.m. on October 26. The cause of death was multiple blows to the head with a blunt object, resulting in skull fracture and intracranial hemorrhage."
Hearing this, Li Ming and the other investigation team members nodded. Zhang Lin continued, "During the autopsy, we discovered that the victim's body was dismembered within 2-4 hours of death, using the single-edged kitchen knife we retrieved from the scene. The dismemberment method was rather crude; the murderer lacked professional anatomical knowledge and may have been in a state of panic during the dismemberment. Furthermore, we found two distinct characteristics in the victim: firstly, the teeth showed obvious tetracycline staining; secondly, the left index finger had an old fracture mark, and the healed fracture site showed deformity."
"Have you found any clues that could identify the deceased? Such as clothing, personal belongings, tattoos, etc." Xiao Yang asked. Zhang Lin shook his head: "Not yet. After the body was dismembered, the clothing was probably disposed of separately by the murderer; we didn't find any clothing residue at the scene or on the body parts. There were also no tattoos, birthmarks, or other obvious markings on the deceased. However, we have extracted the deceased's DNA sample, which has been entered into the national missing persons DNA database and is currently undergoing continuous comparison. In addition, the deceased's tetracycline teeth and old fracture of the left index finger can also serve as important evidence for identification."
"Have you found any clues related to the suspect? Like the killer's DNA or fingerprints?" Xiao Sun asked. Zhang Lin sighed, "Not yet. The killer was very aware of counter-surveillance during the dismemberment and disposal of the body parts, leaving no obvious DNA or fingerprint traces on the body parts. Although we found a small amount of fingerprints on the kitchen knife we retrieved at the scene, it was severely damaged due to being soaked in water, making comparison impossible. However, we extracted some trace amounts of fiber samples from the broken ends of the body parts, which are being tested to see if we can find any clues related to the killer."
Li Ming frowned and said, "In other words, we still cannot confirm the victim's identity, nor have we found any clues directly pointing to the suspect." Zhang Lin nodded, "Yes, Captain Li. The perpetrator in this dismemberment case is very adept at counter-investigation, and his methods are cruel, which has brought great difficulties to our investigation. However, we have already obtained the victim's basic characteristics, as well as important information such as the time and cause of death, which can provide direction for the investigation."
“Zhang Lin, thank you for your hard work,” Li Ming said. “The autopsy report is very detailed and provides important evidence for our investigation. Next, we need to focus on the characteristics of the deceased: First, we need to immediately compile the deceased’s characteristics into a notice for assistance and release it throughout the city, hoping that the public will provide clues; second, we need to expand the scope of the missing persons investigation, focusing on males around 40 years old, about 178 cm tall, with tetracycline teeth and an old fracture of the left index finger who have recently gone missing; third, we need to expedite the testing of the fiber samples collected at the scene, and try to find clues related to the murderer.”
"In addition, the team retrieving surveillance footage should continue to expand the scope of their investigation, focusing on suspicious persons and vehicles in and around Heping Road between 10 p.m. on October 25 and 2 a.m. on October 26, especially the white van. The team conducting door-to-door investigations should focus on densely populated areas around Heping Road, such as rental houses, construction sites, and small hotels, to find out if any persons matching the deceased's description are missing, or if any suspicious persons appeared during the time period of the incident," Li Ming continued to deploy the work.
"Understood!" all the team members responded in unison. Zhang Lin looked at the investigation team members in the conference room. Although the case investigation was currently at a standstill, he could feel their determination and confidence. He believed that as long as everyone worked together and focused on the clues provided in the autopsy report, they would definitely be able to identify the deceased and find the suspect as soon as possible.
After leaving the conference room, Zhang Lin returned to the forensic identification center and continued to lead Xiao Lin in examining the fiber samples collected at the scene. The examination of fiber samples was extremely complex, requiring multiple steps including separation, purification, microscopic observation, and infrared spectroscopy analysis. Zhang Lin and Xiao Lin dared not be careless in the slightest, performing each step with utmost care.
"Teacher Zhang, these fiber samples look quite complex. There are cotton fibers, polyester fibers, and some unknown fibers," Xiaolin said, observing the fiber samples through the microscope.