Misty Forest [Criminal Investigation]

After Nian Feng finished the autopsy, he took out some samples and put them into a special container after simple processing. He asked Lin Zhao to put the body back into the freezer.Nian Feng left Lin Zhao to sort out the follow-up, and walked back to the laboratory next door with the samples taken out just now, praying for rain to follow Nian Feng silently.

Nian Feng observed the samples one by one under the microscope: "The liver and heart have punctate hemorrhages, combined with punctate hemorrhages around the eyes, hyoid bone, thyroid cartilage fractures, and neck bruises. Death by mechanical asphyxiation."

Nian Feng took the teeth in an evidence bag next to the microscope and held them up in front of Qi Yu: "This is the back molar of the deceased. The cusp of the tooth was slightly worn, and the dentin was not exposed. As people grow older, their teeth will appear due to continuous use. Abrasion, this kind of wear is divided into nine grades from shallow to deep over the years, the tooth of the deceased is in line with the first grade of wear, and the age is preliminarily inferred to be around 20 years old, and I tend to be 19-20 years old."

Nian Feng took the IPAD and brought up a photo and showed it in front of Qi Yu. Qi Yu glanced at the photo of the back and side of the deceased. There was an obvious bruise on the side of the neck and under the ears.

Qi Yu gestured to the side of her neck with her hands, "Chopped the dead unconscious while she was unaware, and then carried it to the cave?"

Nian Feng shook his head: "I'm inclined that the murderer should be familiar with the deceased. After the two met, they stunned the deceased and killed her, and then carried them to the cave."

"An acquaintance committed the crime?"

Nian Feng continued to call out the photos they took just after they entered the cave, with their clothes pulled up backwards to cover the face of the deceased.

"This is a relatively loose dress that is not easy to take off. The deceased's chest is flat and there is no rubbing injury. Therefore, during the assault, the only difference between the murderer pushing the clothes above the waist and pushing it to the neck is whether it can cover the deceased. s face."

"The murderer knows this face, and he has guilt and fear when facing this face, so he needs to cover it up."

Following Nian Feng's train of thought, Qi Yu deduced the metaphor of the shape of the deceased's clothes. Nian Feng took out two other test reports on the surface materials of the deceased's clothes and shoes, and found that not only were there no traces of struggle in the hole of the corpse, but the clothes worn by the deceased There was not too much soil on the surface, and a lot of loess was embedded in the fabric fibers at the buttocks of the deceased's clothes. After scraping it off and comparing it with the soles of the deceased, the composition was similar.Only a small amount of material similar to the soil in the cave was found on the sole of the shoe worn by the deceased, while the sole of the other bare foot was relatively clean, indicating that the deceased did not enter the cave because his feet did not touch the bottom on their own. Pass.

"In the empty mountain road at night, the murderer calmly moved to the cave after committing the crime. The murderer is more familiar with the surrounding environment."

"Oh?" Nian Feng tilted his head and glanced at Qi Yu. The time of his death has not yet been inferred, so Qi Yu is so sure that he was killed at night?

"Most residents here have relatively fixed breakfast, lunch and dinner times, six or seven in the morning, twelve at noon, and six or seven in the evening. The road where we picked up the shoes is the main road in the mountain. During the day, the villagers go in to pick up firewood. Wild vegetables, there are many people going to other villages through there, according to your guess, the time of death is more than 4 hours after the meal, the risk is too high after breakfast and lunch, the murderer can’t be so calm, so the chance of death is high at night.”

As soon as Qi Yu's voice fell, a tester placed in the distance gave a beeping sound. Qi Yu turned his head and saw that the tester spat out a long note. Nian Feng walked over and tore it off to see the curve on it. .

"The deceased had been sexually assaulted during his lifetime, and the murderer brought relatively cheap condoms."

"Cheap?" Qi Yu unconsciously raised his voice, he was not questioning Nian Feng but rather surprised.For female victims, the forensic doctor can judge whether she has been violated before her death through observation, and can judge whether there is semen left in the victim's body through the pre-sperm spot test.

If there is no biological material left after being violated, the biggest possibility is that he was wearing a condom, but how did Nian Feng find out that the murderer was wearing a cheap one? ?

Nian Feng looked at Qi Yu and his eyes gradually changed from shock to indescribable indescribable, he smiled, but the mask covered Qi Yu and couldn't see his smile.

"Well. I have research..."

Qi Yu curled her lips and wanted to ask, did you do research by yourself?How many people have you studied with?Thinking that Nianfeng only said a few words to him today so as not to offend him again.Slowly repeated Xia Nianfeng's words.

Because the cave where the corpse is hidden hardly receives sunlight, and the internal temperature is low and humid, although the temperature of the corpse has lost its reference value, most of the traces on the corpse have been well preserved.Nianfeng found a residual component of lubricating oil in the samples collected from the deceased. He repeatedly took samples to obtain a sufficient quantity for testing. After testing, he determined the main raw material of the lubricating oil: a relatively cheap grease.

This kind of oil is widely used in many fields because of its low price, including latex condoms and body lubricants. However, this kind of oil has a defect: it is slippery and uncomfortable when used in large amounts, and it is easy to evaporate and dry out if used in small amounts, affecting the experience.So now some high-end condoms and lubricating fluids have gradually abandoned this raw material and turned to more advanced substitutes to improve the user experience.

After hearing this, Qi Yu raised a point of view: "In other words, you didn't detect the semen in the body of the deceased, right? According to your thinking, this kind of low-priced oil will also be used in human body lubricants. Is it possible that the murderer did not get along with him?" Did the deceased have direct sexual contact, but did he use another method?"

Nian Feng raised his eyebrows: "You said that this possibility is not impossible. If you use other methods, it means that the murderer has no way to complete direct contact. It may be due to physical defects, but perpetrators with physical defects often leave behind the body of the deceased. There are signs of abuse, such as scratches, scratches, etc., and this corpse only has wrists, scratches on the back of the neck and no similar abuse marks, so my judgment is that a condom was used.”

Qi Yu cupped his hands: "Thank you brother, I will leave the rest to you, I will have to trouble you when I go out for a while!"

After Qi Yu finished speaking, he ran downstairs like a gust of wind and met Qu Ruichuan and Bao Siqi who had just come back. He said something to eat in the office and disappeared into the darkness in a blink of an eye.

When the two walked into the office, they saw several boxes of instant noodles and a pack of ham sausage piled up on the table.

"Hey, brother Qi is so cheap? This instant noodle and ham sausage is not cheap." Qu Ruichuan picked up the box and looked at it. In addition to accumulating a wealth of work experience in Longyue Province in the past few years, he is more familiar with the place. The distorted price changes are clear to the chest, and the poorer the place, the more expensive things are.

Wen Bin nodded and said that Praying for Rain should have placed an order online and stocked up overnight last night. Don't be polite, everyone, eat enough and work hard.Bao Siqi filled the kettle with water and pressed the switch to ask Wen Bin, who just ran down from the second floor to pray for rain, do you know where he went?

As soon as Wen Bin heard this and ran down from the second floor, his heart sank. Didn't this person do something to the forensic doctor Nian?

"How about Nian Feng? We haven't had much contact since we've been here for so many days?" Wen Bin turned his head to look at Qu Ruichuan who said he met Nian Feng early in the morning.

When it comes to Qu Rui’s eloquence, it’s the basic configuration of being generous and careless. He is meticulous in his work and has a gentle attitude towards everyone. Although he doesn’t talk much, he speaks softly...

"His car is a private car, but it's not even reimbursed for the gas fee when it's used for public use. I've been lucky enough to ride it twice. It's great! I don't know what brand it is, but it's definitely not cheap." Qu Ruichuan mentioned Nian Feng's car. This dark gray off-road vehicle is full of ideas.

The difference between the Nian Feng mentioned by Qu Ruichuan and the Nian Feng that Wen Bin was in contact with is actually not too obvious. After all, they have only known each other for more than half a month and haven't had much contact with each other, but the Nian Feng who met Qi Yu are two extremes. Wen Bin couldn't figure out the reason, so he simply didn't bother to think about it. He estimated that Nian Feng should be one of the people who had offended Qi Yu inadvertently and without knowing it in those years.

The three of them exchanged the conclusions of their work just now with instant noodles. Qu Ruichuan and Bao Siqi went out to post notices and asked the local villagers. They didn't hear of anyone who had lost a girl, not even those who had recently traveled far.Wen Bin checked the missing persons database in the entire Longyue Province in the past two years, but there was no record of appearance matching the corpses. He asked Ke Xia and there was no missing person report recently.

The sporadic lights of the village in the distance were extinguished one by one, and the sound of barking dogs gradually disappeared. Qi Yu walked in with a large black plastic bag in his hand.The three of them hadn't figured out what the thing with countless edges and corners protruding from the praying rain bag was, and praying for rain dumped the contents of the bag on the desk with a clatter.

Bao Siqi glanced at the outer packaging of different colors, his face blushed, and he turned his head slightly to one side.Qu Ruichuan didn't know, so he picked it up with his hands, and there were only two items in it and nothing else.

Wen Bin swallowed: "Brother, what are you buying so many sets for?"

"For Nian's forensic use..." Qi Yu tore open the cellophane of the outer packaging one by one.

"Ah!" The three of them exclaimed in unison.

"How to use it??" Wen Bin felt that Qi Yu was not that kind of person, so he risked his death and continued to ask, he was afraid that Qi Yu would ask him back: How do you use it?

"Nian's forensic doctor detected low-end lubricating oil components that belonged to cheap condoms and lubricating fluids from the body of the deceased, so I went to buy all the cheap ones I could buy here, and see if I can trouble the Nian's forensic doctor to find out what the murderer used. What kind of thing is it?"

The three breathed a sigh of relief and started to help Qi Yu tear the package. Qi Yu stretched out his hand to stop the crowd: "No, it will be messed up if you touch it. I will fix it for him myself. If you want to help, take a pen and paper to remove these brands. Record the specifications and I will use them later.”

"Little Wenzi, you are ready to order the evidence bags and I will number them."

Qi Yu walked into the office on the second floor with a bag of numbered bottle sleeves. Lin Zhao saw the contents of the bag and his closed mouth gradually became O-shaped. Nian Feng glanced sideways and didn't ask a word: "Leave it alone. I'll help you check this after I finish the test at hand. You can write down where you bought it."

"Hmm. Trouble."

Qi Yu dropped a bag of things and left the identification department. Lin Zhao asked Nian Feng suspiciously: "Master, what is this test for? Why didn't I know when he told you?"

"I didn't say that. You sort out the existing reports, and when I calculate the results, I can issue the initial inspection report." Nian Feng still had half a sentence in his stomach, but I knew he ran out just now. What did he do?

Fish belly exposed in the sky, Bai Linzhao walked into the office on the first floor with the completed preliminary inspection report. Four people in the office leaned back on their chairs. Wen Bin opened his eyes and stretched himself when he heard the footsteps: "Thanks for your hard work."

Lin Zhao handed the report to Wen Bin and said as usual: "Master said that if you have any doubts, you can go to him at any time."