Three corpses of different sizes were placed on the two autopsy tables. Their skulls were too small, so there was no doubt that they were all underage children.
Zhong Xueru wore a mask, took off his glasses, took a breath, wiped them clean, put them back on, then crossed his hands, rubbed his chin with his left hand and stared at the bones thoughtfully.
Next to him stood Ji Chengling.
Li Zan walked in and picked up the autopsy results next to him and said, "Are there any major findings?"
Zhong Xueru said: "The largest height is 1.44 meters and the smallest height is 1.1 meters. There is an error of 1020 millimeters. The bone ages were calculated to be 13 years old, 11 years old and 10 years old respectively. As for the gender, they are all minors who have not matured in sexual development.
The difference between the skull and the pelvis is not very big. Only by asking an experienced forensic doctor who has dealt with the bones of young children to examine the case can the gender be determined 100%. The two elders are girls and the youngest is a boy. When the bones were delivered, I immediately had them done.
Metal cation detection can estimate the time of death based on the radioactive isotope content in bones."
"About four years ago, the error in the period from September to October was no more than one month. The last key cause of death." Zhong Xueru paused and shook his head: "It's really tricky."
"These three corpses have been hidden in the sewer for four years and have been blocked by typhoons and floods no less than ten times. After being washed away by water, various dents, scratches and various moss appeared on the bones... According to my inference,
The drainage outlet on East Ring Road 3 is not the place where corpses are dumped. The place where corpses are dumped should be further ahead. As for where it is, you can do an experiment to get the distance by using the speed of the bones pushed by the water flow. The process from decomposition to skeletalization in four years
The weight is all written on the paper.”
"We can also estimate possible corpse dumping points based on the three-dimensional map of underground waterways," Ji Chengling said.
"It's not easy. The deceased and the evidence that the murderer may have left will disappear in the water. Water is the natural enemy of criminal investigation." Li Zan said disapprovingly: "Old Zhong, you continue."
Zhong Xueru: "We have repeatedly deduced and inspected carefully to rule out cracks caused by movement and impact of the bones, leaving traces that are most likely to be injuries during life. Come and take a look."
Li Zan and Ji Chengling stepped forward and looked in the direction Zhong Xueru pointed.
"The bone age is 14 years old. She is a female. It is easier to determine the cause of death because the large corner of her hyoid bone was broken, and it was not broken by external force after death such as water impact. It was broken during life. It can be judged that it was mechanical death caused by external force."
The hyoid bone is the bone in the tongue. It was broken by external force during her lifetime, indicating that she was strangled to death.
Then, Zhong Xueru pointed to the ribs, hand bones and leg bones of the skeleton and said: "Six ribs are missing. The fracture sections are relatively neat. It is likely that they were broken by an impact after death. The finger bones were broken, the leg bones were broken, and the soles of the feet were shattered.
The bone fragments were incomplete, so I made bone grinding fragments from the broken bones and observed them under a microscope to confirm that the broken finger bones and leg bones were injuries during her lifetime, but not the soles of her feet."
Bone grinding refers to grinding the damaged part of the bone into grinding discs. Through a microscope, you can observe whether heme appears on the bone grinding disc. If it was an injury before death, blood will penetrate into the bone, and hemoglobin will appear around the bone injury.
On the contrary, it is not an injury during life.
"The other two corpses were examined using the same method. The smaller one had a fatal injury on the skull and was killed by a blow to the head before death. The larger one had broken ribs, a displaced hip joint, and a broken arm. None of the injuries looked like fatal.
.But I judged the direction of the fracture based on the cross section of the rib fracture and measured the length. I can confirm that the rib was inserted into the lung and he died without timely rescue."
Ji Chengling showed an unbearable look on his face and whispered: "Why does it sound like he had suffered great torture during his lifetime?"
Zhong Xueru raised his glasses, paused, and spoke in a low tone: "The bones of three children were knocked into sacks and thrown into the sewer. This does not look like a temporary act. Children are incapable of resisting, they are weak, fragile, and extremely easy to do.
It arouses the murderer's desire for sadism. And setting the target of persecution on children just shows that the murderer has low morals, no normal empathy and a certain tendency to abuse."
Li Zan: “What does hip displacement mean?”
Zhong Xueru: "External force. Being hit hard or... raped."
"Beast!" Ji Chengling cursed.
"The other two were not violated during their lifetime?"
"No."
"Are all the autopsy results here?"
"Yeah. There's basically no big problem." "I'll take it away first and give you a copy later."
"OK."
Li Zan and Zhong Xueru asked and answered questions without any unnecessary nonsense. After finishing the conversation, they turned around and left.
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