Misty Forest [Criminal Investigation]

Nianfeng's report clarified the important information of the deceased: female, 1 meters tall, 69KG in weight, 45-19 years old, was attacked and passed out before being strangled and died of mechanical asphyxia. The death time was 20-84 years before the body was found. 86 hours.The scene was not the first scene of the death. The deceased had not been moved since he was transported to the place of discovery immediately after his death.The footprints on the muddy floor in the cave have the same pattern on the soles of the light green cloth shoes worn by the deceased, and the size is the same, both are size 39 and 24.5 centimeters.

Determining the time of death is an important part of the investigation of criminal cases. Qi Yu was so cold in the cave that day that he almost shivered. He estimated that the temperature in the cave was only a few degrees.

He knew that the core temperature of the corpse would eventually drop or rise to be the same as the ambient temperature. He stood in the cave and based on the calculation formula he knew plus the influence of the low temperature environment, he preliminarily estimated that it would reach the temperature in less than forty hours after death. about the same as the ambient temperature.However, the stiffness of the corpse has been significantly relieved, and the plaques on the corpse have stabilized. In addition to the influence of the low temperature environment, the combination of these two conditions can determine that the time of death must have exceeded 72 hours.

The temperature in the cave was low and no flies were found on site, so the growth rate of the maggots could not be used to calculate the time. So how did Nianfeng deduce the exact time of death?

As expected, within half an hour after Lin Zhao's report was delivered, Qi Yu walked in with a smile on his hands holding the report. He didn't even knock on the door. He thought he was smiling brightly and said to him: "Mr. Do you have any tricks at the time of death?"

Nian Feng raised his eyelids and glanced at him, moving away from the observation lens in front of him, "vitreous humor..."

"Vitreous humor??" Qi Yu pointed to her eyes.

Nian Feng's eyes met his for 0.5 seconds: "From the outside, your vitreous humor can also have the same effect."

If another person said this to Qi Yu, and Qi Yu was either irritable or violent and replaced by Nian Feng, who usually didn't talk to him, this sentence would have the opposite effect.

"You see my eyes are big and bright, so you can judge the health of my eyeballs to pass this test?"

Nian Feng actually regretted that sentence just now. No matter what kind of person Qi Yu is, he should not bring this emotion to work no matter how much he likes or dislikes it. Vicious.What surprised him was that Qi Yu didn't blow his hair, and his mental preparation for an immediate apology was useless now.

"There is a kind of weed outside the cave, which has the effect of natural mosquito repellent, so no flies can fly in. The temperature in the cave was less than ten degrees at that time, and it will be lower at night, so we used to use the body temperature to estimate the time of death. The method is not accurate." Nian Feng opened the drawer while speaking and took out a stack of test results and his draft paper full of checking formulas.

"The method of vitreous humor to estimate the time of death is not used much, because this method is too demanding on the physical condition of the deceased. First of all, it must be ruled out that the deceased has no underlying disease and the eye health is in good condition. These two points will rule out most of the deceased. If It is the high temperature environment that can predict the degree of corruption of the corpse, so this method is not common, and it is used with a lot of interference, and the results vary greatly if you are not careful, but this time you are lucky, the eyes of the deceased recorded the time." Nian Feng said Wan picked up a pen and wrote down some key words for Qi Yu on a piece of white paper.

The reference value of vitreous humor is accumulated through years of practice. After donating remains and organ volunteers, researchers from all over the world took samples of vitreous humor immediately after their death for sample analysis, and entered the composition data into the basic value. At the same time, the basic reference value of healthy vitreous humor was obtained by combining the sampling comparison of living people in medical treatment practice, and then the formula for deriving the time of death was obtained based on the data of the changes in the composition of vitreous humor at different times after the death of many deceased people. Reference range value.

Nian Feng pinched the black pen holder with his fair fingers and wrote black ink on the white printing paper: glucose, inorganic phosphorus, and potassium ions.

The contrast between black and white is so strong that praying for rain couldn’t help pulling out the printing paper before Nianfeng made the last stroke, “In the human body, most of the potassium ions are distributed in the cell fluid. After death, the body cells gradually autolyze, and the potassium ions When it enters the blood, the potassium level in the blood becomes high. The same happens in the vitreous humor..."

"You did well in the elective courses in college." Nian Feng affirmed Qi Yu's statement.

After death, the eyes are the organ least affected by the external environment temperature. The three contents of glucose, potassium ions and inorganic phosphorus will change slowly with the increase of death time. Among them, the glucose will gradually decrease, and it will drop in the vitreous humor for more than one day after death. to 0.Potassium ion content will continue to rise, and has obvious regularity that can be referred to.

After checking the surrounding conditions in the cave, Nianfeng basically determined the method of inferring the time of death of the deceased. After returning, he checked the condition of the deceased's eyes immediately: they were very healthy.He immediately extracted the vitreous humor and finally determined the time of death through continuous observation of numerical changes, comparison of reference values, and formula derivation.

Qi Yu got the exact answer and went back to the office to gather the three people to determine the direction of the next investigation, based on the fact that the shoes worn by the deceased were of the same size and pattern as the murderer's shoes, and he confirmed yesterday that these shoes were in the town. It is sold in the store, and it belongs to the backlog of special products that were sold two months ago, so at least one of the deceased or the murderer has lived in Lumna, which is ten miles away, two months ago.

Since no one responded to the posting of the corpse identification notice, we went from village to village to find it. If we couldn't find it for two days a day, or three days after two days, we could finally find clues after walking through this area.

Qi Yu marked the area visited today for everyone, when the landline phone on the desk suddenly rang, Qi Yu grabbed the receiver and said, "Hello, Lumna Criminal Investigation Team."

"Comrade officer, I just got home this morning, and my wife said you want to ask about that dress?"

"Well, do you remember where it was sold?"

"Look to see if the doll's ears are heavily printed. If so, then I'll know."

Doll ears?Qi Yu repeated these four words. Wen Bin had already taken out his mobile phone and enlarged the photo to show Qi Yu. The ears of the cartoon character in the photo were printed rough, and ghost images appeared, and two ears were stacked together. If you don't look carefully, you can see no.

"There are two ears stacked together."

"About a month ago, I sold it in Liucun, and I sold the other one in country K."

"Remember what it looks like to buy clothes?"

"I can't remember what it looks like. It's hot and everyone wears hats. How can you see what it looks like? The voice is a young boy saying that he wants to buy a dress for his girlfriend and ask me to make it cheaper. I didn't do it. He picked it out. If there is something wrong with it, I will deal with it cheaply for him.”

"Did you see him again afterward?"

"No more. I didn't pay attention to those who didn't come to ask the price."

Qi Yu hung up the phone and opened the map to dissolve the area he had just decided to visit, and found the location of Liu Village, a village about [-] kilometers away from the center of Lumna Town in a straight line.There are two nearby villages around Liu Village, one is Hanjia Village and the other is Hekou Village.After planning the approximate destination, several people got into the car and set off immediately.

"Starting from Liucun, I visited the three surrounding villages to see if anyone knows this person or this pair of clothes and shoes. The shoppers who walk from village to town can meet buyers who basically live nearby or have relatives. Nearby, combined with the gender of the buyer and the purpose of the purchase, it is very likely that the girlfriend he said was the deceased." Sitting in the car, Qi Yu told the three people the direction of the next inquiry into the village.

"Could this boyfriend be the murderer?" Bao Siqi asked.

"It's unlikely. If the boyfriend is a murderer, he won't choose when the dead woman is wearing the new clothes he gave him. Even if he misses the murder in a momentary dispute, he should take the clothes away, because the target is too big." Driving the car, Qu Rui Chuan held the steering wheel tightly in his hands and was distracted from participating in everyone's discussion.

"Judging from the behavior of knocking out first, then attacking and finally assaulting, the murderer was premeditated. If it was a boyfriend, there is really no need for her to wear the clothes he gave to him."

Several people discussed praying for rain all the way and heard Wen Bin's voice becoming less and less, and couldn't help turning their heads to look at Wen Bin who was sitting directly behind him. At this moment, Wen Bin's face was pale and his mouth was pursed.

"Xiao Wenzi, are you motion sick again?"

Wen Bin waved his hand: "I didn't eat breakfast, don't worry, I'm fine, I'm just a little dizzy and I'll take it easy."

"If you want to vomit, just say it. When I first arrived in Longyue, I vomited all the way out of the suburbs for the first year. You are much better than me." Qu Ruichuan glanced at the rearview mirror and slowed down the car.

A few people parked their cars at the entrance of Liucun Village, and all the villagers went to work in the fields. There were only some old people and children in the village. Qi Yu took the photos and asked them one by one, but found nothing. Only a little boy said that he seemed to have seen this sister from the village. After passing by, it is certain that it is not from their village, but I don't know where it is.

Qi Yu took a look at the terrain. It took half an hour to walk from Liucun to Hekou Village and Han Village. He arranged for Bao Siqi and Qu Ruichuan to drive to Hekou Village. Ask, if you find it, call him, if you don't find it, they will meet in Hancun.He and Wen Bin walked to Han Village...

Qi Yu and Wen Bin walked all the way and asked, and met two elderly women who said that the photo looked like the daughter of the third family of Han in Hanjia Village, but they were not the same age, but the surname of Han in Hanjia Village was that every family was related. There are also people outside with anecdotes, maybe it's a relative of someone's family.

One said that they looked alike, which was not enough to confirm, and the other said that they looked alike. This information attracted Qi Yu's attention, and the two of them hurried to Hanjia Village.Just after 11:30 in Hanjia Village, white smoke rose from every house in the village, and bursts of rice fragrance wafted from all directions.

The stomachs of the two people who didn't eat breakfast were rumbling now, Wen Bin swallowed, "Brother, where should we start?"

"The first one in the village."