The first step in on-site investigation is to take photos.
At the northeast corner of the cordon, Lu Chuan set up a tripod to take panoramic photos.
Because it was temporarily unclear whether it was the scene of the first crime, Lu Chuan needed to go through the entire on-site investigation and photography process.
This set of procedures has long been imprinted in Lu Chuan's mind and can be completed in dozens of minutes.
While the current investigation continues, Qin Yong and others are also learning about the case.
The person who reported the situation was Wang Jian, the director of the Xijiao Police Station.
"Captain Qin, we received the report at 10:30 in the morning."
Wang Jian pointed to a middle-aged man in a white Jetta police car who was taking notes.
"The vineyards here are purchased by Xijiao Lexiang Biotechnology Co., Ltd. and farmers, and they are mainly planted with wine grapes."
"Every spring, they and the village hire a well maintenance team to perform maintenance and inspections on more than 30 wells in the vineyard."
"During the inspection of the No. 3 engine shaft, the water output was small. According to their experience, there should be something blocked, so they carried out salvage."
"As a result, the body was recovered."
"What is the specific condition of the deceased?"
Qin Yong's face was ashen. The murder of a minor had not happened for a long time. The last case was three years ago.
A primary school student was strangled to death by a drunk man when he came home from school.
"The deceased's name is Wang Zihan, a sixth-grade student at the farm in the western suburbs."
"I reported him missing two days ago. I didn't expect..."
The disappearance of a child is a major case no matter where it is, and it must be filed immediately to find it.
Wang Jian then reported on the situation of the case they received.
Two days ago, Wang Zihan left home at 7:30 in the morning and walked to school.
"Wang Zihan's home is about three kilometers away from the school, and he has been walking to school since he was in first grade."
"Does he always walk to school alone?"
Wang Jian shook his head: "The vineyard contracted by Wang Zihan's family is far away from the village. During the winter, they live next to the vineyard. They are the only family."
"On their way to school, the children will first walk less than two kilometers by themselves, and then pass by the natural village where their home is located. There are many students there, and most of them will walk together."
"Can you determine the time when the child disappeared?"
Qin Yong asked, while Sun Jun was taking notes.
"It was the school teacher who discovered the child was missing. School ended at 4:30 p.m., and Wang Zihan's class teacher called Wang Zihan's parents at 4 p.m. to ask why the child didn't come to class."
"The child's mother said that her child had gone to school early in the morning. Only then did she realize that her child was neither at school nor at home. After that, the child's mother called the police."
Wang Jian has a very detailed understanding of the entire process of the child's disappearance.
"The time we received the missing person report was 4:08 two days ago."
"Then we organize manpower to search for children along the path they take to school."
"But two days have passed and nothing valuable has been discovered."
"Is there surveillance on the road?"
Wang Jian shook his head: "There are large areas of vineyards in the western suburbs. Except for important intersections and some grape growers who have surveillance in their own yards, there is no surveillance on most road sections."
"Have you determined the approximate section of the road where the child disappeared?"
Wang Jian nodded affirmatively: "The section of road where the child disappeared should be between the home and the natural village."
"Because the child's deskmate lives in Zirantun, he would wait for him every day at school. However, on the day of the incident, Wang Zihan's deskmate did not wait for him."
"In addition, there is a surveillance camera at the east end of Zirantun. Although it is not high-definition, it is operating normally. We checked the surveillance camera and found that we did not see Wang Zihan passing by on the day of the incident."
"Is that the only way to go to school?"
"Yes, all the children passed there. Although you can pass through the vineyards on both sides of the village, the snow in the farmland has melted and it is wet.
Yes, the child shouldn't be able to go around that way. "
Wang Jian's report has been very detailed, and Qin Yong already has an overview of the case.
After thinking for a moment, Qin Yong pointed to the shaft where the body was found: "How far is the No. 3 shaft from the section of road where the child disappeared?"
"About three kilometers."
Three kilometers...
With such a long distance, it is unlikely that a child could walk alone.
"Is there anyone suspicious?"
"Not yet. Our main focus in the past two days has been on finding the child, and we haven't had time to conduct a family background check on the child's parents."
Wang Jian understood what Qin Yong meant. If the child was killed, if the other party did not commit the crime accidentally, it was probably related to the child's parents.
For example, if a child's parents offend someone, the other party commits a revenge crime.
But as Wang Jian said, the child is missing and the key is to find the child.
But unexpectedly, what was finally found was a body.
on site.
Lu Chuan has completed taking photos around the scene and is conducting surface inspection of the corpse.
"The left ear is missing and has tooth-like bite marks."
This is the most obvious sign of damage on the body: "There are obvious pinch marks on the neck, and the lips and face are purple. It should be suffocation."
"Ding!"
"Advanced mission: Find the scene of the first crime, and identify the criminal suspect through on-site investigation of evidence."
While Lu Chuan was making field survey records, the system issued a task.
"This shouldn't be the scene of the first crime."
Lao Bai pointed to the edge of the shaft: "Look here."
Lu Chuan and Liu Guodong came over and looked at the edge of the shaft pointed by Lao Bai.
There are some minor scratches.
"There are traces of friction on the right leg and ankle of the corpse, and the skin is damaged, but the wound characteristics have no activation reaction. Combined with the traces on the edge of the shaft, it should be left by friction when the murderer dumped the body."
What Lao Bai said was that if this was the first scene, then the murderer would have dumped the body immediately after killing the child.
As for the corpse that had just died, the blood had not coagulated and could still bleed. However, there was obvious skin tissue on the scratches, but no blood stains.
The wound on the child's leg did not activate, which meant that the body was thrown into the well after a period of time after the child died.
"The child was killed after he disappeared. We will ask later if we can determine the location of the child's disappearance, and then we will conduct an investigation." Kansula
Liu Guodong's opinion was also Lu Chuan's. This was not the scene of the first crime, and it had been destroyed by the well maintenance team's salvage of corpses, so it had no exploration value.
"The child's left ear is partially missing. Judging from the marks, they are tooth marks. I want to collect trace evidence first to see if I can find anything."
Liu Guodong and Lao Bai also looked at the missing scar on the left ear of the corpse.
What is certain is that the bite marks belong to humans and are most likely left by the murderer.
In fact, in criminal investigation technology, there is a special research discipline on tooth marks.
Each person's bite marks have their own characteristics because of the different gaps between teeth and the degree of tooth wear.
Therefore, bite marks can also be used as forensic evidence, but there are very few people who are proficient in this skill.
At least there are no talents in this field in Haizhou City.
Of course, Lu Chuan was not proficient in it. The skill of tooth mark identification and analysis was available in the system, but Lu Chuan had not chosen it.
The trace evidence analysis he wanted to do was to see if he could extract the murderer's saliva from the wounds on the corpse.
Then determine the DNA information of the murderer.
Liu Guodong also knew what Lu Chuan was thinking. Lu Chuan had also used trace evidence analysis to solve cases before.
And now there is a little convenience. The current investigation office's own trace evidence laboratory has just been inspected and can be used. There is no need to ask the provincial department for help.
Can
The problem is, the body has been soaked in the well.
"Can the murderer's saliva be collected from the wound?"
"It's really unlikely." Lu Chuan also knew that it would be difficult to extract DNA test materials from soaked wounds: "But we have to try anyway."
