Chapter 087 Ai detachment technical surgery, small police report the case

At nine o'clock in the evening, the meeting will be held on time.

The meeting was chaired by Director Zhang, and after a brief opening remarks, he went straight to the point and said:

"The technical team will report on the on-site investigation first."

Ke Brigade says:

"At the scene of the two cases, we divided into two groups to investigate separately, one group was dominated by Captain Zheng and the other group was dominated by Captain Li. Our detachment was also divided into two groups to survey together.

Since before we came, Captain Zheng and Captain Li had already examined the two injured, and the inspection was reported by Captain Zheng, and I reported to our group. ”

Team Ke looked at Captain Zheng, who nodded and said:

"Combined with the forensic Lao Cai's examination of the two injured, I will introduce the injuries.

HUANG YUYING'S INJURY IS LOCATED ON THE RIGHT SIDE OF THE CHEST, WHICH IS TWO PARALLEL LINES, WITH A LENGTH OF 7.5CM, A SINGLE SCAR 2CM WIDE, A DEPTH OF 0.1CM, AND A DISTANCE OF 5CM BETWEEN THE TWO SCARS.

HUANG RONGZHI'S INJURY IS LOCATED AT THE ROOT OF THE RIGHT THIGH, WITH A LENGTH OF 5CM, A SINGLE SCAR 2CM WIDE, A DEPTH OF 0.2CM, AND A DISTANCE OF 5CM BETWEEN THE TWO SCARS.

In addition, after forensic examination, the two injured were raped by force, and the forensic doctor Lao Cai has made a blood type, which is the same as before, both are blood type B.

The injuries of the two injured persons were largely the same as those in previous cases, with two parallel scratches. And the spacing between the two scars is 5CM, and the difference in depth is due to the size of the force, which does not affect the entire analysis and judgment.

Therefore, these two cases can be investigated together with previous cases. ”

Brigade Ke continued:

"Our group is investigating Huang Rongzhi's house, his house is located on the west side of Wong Nai Tan Bay, Baisha Village, is a three-room house, sitting north and facing south, with a hall house in the middle, and a room on each side of the east and west, and the accident site is located in the west room. That is, in Huang Rongzhi's room. This is the central site.

Huang Rongzhi's room has fewer items and simple furnishings, with a table under the south wall and a wardrobe in the southwest corner. There is a chest of five drawers under the west wall. There is a bed in the northeast corner. There is a low cabinet in front of the bed, on the south side against the east wall, and the floor is dry hard soil, and the whole room layout is like this.

In terms of trace evidence. Not very well handled. No footprints of the perpetrator were found on the indoor and outdoor grounds, and the conditions at the scene were too poor. In terms of fingerprints, there are none. However, a gray fibrous item was extracted from the lock of the east side door, which is more likely to be a rope. At the latch of the back door, we found 6 dots and no less than 8 line-like traces, after analysis and research with Captain Zheng and others, and on-site experiments, it can be affirmed that scissors were formed, that is to say, the perpetrator took scissors to open the back door latch and enter the room.

The analysis of the entire crime process is as follows:

The perpetrator took scissors and other items to open the door and enter the room, used hemp rope to buckle the east side door, then entered Huang Rongzhi's room, dropped the light bulb in the room, knocked Huang Rongzhi unconscious with a special tool, and formed a scar on the root of his right thigh, and then committed a rape, after the crime was completed, he took the light bulb and removed the rope, and still escaped through the back door. To put it simply, it's back door in and back door out.

The work of collusion and merger cases has been introduced by Captain Zheng just now, so I will not repeat it. ”

"That's the conclusion of your afternoon of exploration?!" Detachment Ai asked, apparently very dissatisfied.

"Ai detachment, the objective conditions on the scene are really poor, and we have worked hard." Captain Ke replied.

"Huang Rongzhi was injured at the base of her right thigh, and when she was knocked unconscious, did she sleep in her underwear or not?" Detachment Ai then asked.

"This and this...... I did not ask the victim and did not meet the victim when I came, the examination had been completed. The Ke team stammered.

"You are the one who investigates the scene, you are the one of the city bureau, and you are the person in charge of the city's forensic technology. After the case happened, there are some situations where you don't ask the victim personally, you don't do it yourself, can you figure it out?! After the comrades of the Dongyang County Bureau have checked it, can't you check it again?! "The Ai detachment was a little angry.

Ai's detachment asked one question after another, one question after another, and in the end it became a question, which made the technical people very nervous, Xiao Cao looked at me with a panicked face, and the others were even more frightened.

The Ai detachment showed no signs of stopping, but continued:

"Do you know how important it is for us to scout this issue?! If the victim slept with clothes on, and there were no such marks on the clothes, it means that the perpetrator took off the victim's clothes and then injured them with tools. These two big living people are both teenagers, and others take off their clothes, can they not know?! If we know this, it will be possible to see the face of the perpetrator clearly, and if we see the face clearly, the investigation of the case will be greatly advanced. If you don't solve these important problems during the on-site investigation, do you call the field investigators to solve them? Tell us to command the staff to solve it?! ”

Director Zhang was busy distributing cigarettes to the Ai detachment, and the Ai detachment took the cigarette and put it on the table, did not light the fire, but looked at the Ke team, who lowered his head and did not dare to make a sound.

I know that these problems are indeed the problems that we need to solve in the on-site investigation, and the real reason why the Ai detachment is angry is that there is no thing that can reveal and confirm the crime at the scene, and there is no technology to support the investigation and solve the case, and it must be more difficult, and he is using technology to open the knife.

Director Tang quickly changed the subject:

"Captain Li, your group will report on the investigation."

I nodded and said:

"Our group is called Xiao Cao Report."

There was an "oh" sound in the conference room, and Xiao Cao's face was even more red.

"Captain Li, did you ask a police officer to report such a big case? Why didn't you report it yourself?! Detachment Ai, who had softened his tone a little, was enraged again and asked.

"The scene of this case was investigated by Xiao Cao, so he reported it." I replied.

"What? What did you say?! Such a big case. You called a technician to conduct the survey?! So what do you guys do?! "The Ai detachment was simply outraged.

"Ai detachment, you may not know, since the beginning of this year, our technical team has carried out a comprehensive reform, every technician is an all-rounder, we only talk about the results, regardless of the position." Director Zhang hurriedly explained.

"Really? Then I would like to hear about the results of your comprehensive reforms. Ai Detachment picked up the cigarette on the table, lit it, and smoked it.

I nodded heavily to Xiao Cao, and he nodded to me as well. Then stand up. Said:

"Leaders, I will now report on the exploration of our group."

"Xiaocao, don't be nervous." Director Tang said.

Xiao Cao nodded and said:

"Thank you, Director Tang.

The victim's home, Huang Yuying, is located in the middle of Wong Nai Pool Bay, in the east. It is an old house with five rooms. Sit north and face south. There are a total of eight rooms in size. There are 1.5 meters of lanes on the east and west sides separated from other houses, and these two walls have no doors and no windows. It can be ruled out that the perpetrator used this place as an import and export.

There are four and five windows on the north and south sides, all of which are wooden, small and medium-sized windows, and these nine windows have no obvious signs of pry damage, so it can also be ruled out from entering the room through the windows.

The roof is covered with green tiles, and there are no holes, chips, or fresh marks, so the possibility of entering through the roof can also be ruled out.

Judging from the exclusions in the above aspects, the perpetrator can only enter the house through two doors. We interviewed the victim and his mother, and they all reported that after opening the front door, they went to the hospital for treatment, and we repeatedly inspected the front door, and the front door was a thick wooden door, which was closed from the inside, and there were no obvious traces of prying or destruction at the door latch and door shaft, so the possibility of entering the house through the front door to commit the crime could be ruled out.

For the rest, only the back door remains, and the back door is a wooden door.

We carried out a detailed survey and inspection and test of the back door, and found that the gap between the back door shaft and the wall is 3CM wide, and the fingers can be fully stretched in. In other words, it is possible to break into the house.

This is not the key, the key is that at the latch, we found 7 dots and 9 linear traces, which are relatively fresh, and the light is observed, and the reflection is strong. In addition, there is a 2CM gap between the two doors, which can fully accommodate small items to enter. Combining the two, we determined that the perpetrator entered the house by using a scissors to latch the door to commit the crime, and combined with the situation at the front door, we have reason to infer that the perpetrator fled the scene through the back door. In other words, the perpetrator entered through the back door and exited through the back door, which is the same as the way of committing the crime introduced by Captain Ke.

The activities of the perpetrator in the room are also basically the same as those introduced by Captain Ke, including buckling the door of the room, taking the light bulb in the lower room, taking it away after committing the crime, and so on. I won't repeat it, but I want to focus on the physical evidence.

The first is the footprint. We found a footprint in the gutter of the back door, this footprint is very fresh, and a very favorable condition is that Huang Yuying's kitchen is next to the back door, and a lot of dirty water is usually poured at the back door, so the ground is relatively wet, which provides objective conditions for the footprints to remain.

Next, we will solve the question of why this footprint is the perpetrator.

Huang Yuying's family is currently the only one at home, she and her mother, we have seen the shoes they are wearing, and we have also looked at all the shoes in her house, and none of them match, so it can be ruled out that she and her family left behind.

The second point is that the location of the footprints is in the gutter, which is relatively special, and ordinary people will not leave footprints here when they walk normally.

Third, judging from the pointe pointing of the footprints, the pointes pointing to the direction of the outdoors, combined with the fact that the footprints are very fresh, it can be affirmed that they were left by the perpetrator, and the mechanism of the footprints left by the perpetrator is inferred: when the perpetrator fled the scene, he was psychologically urgent, did not have time to take a closer look, panicked, and mistakenly stepped into the gutter.

What's more, when Captain Li led us to search the periphery, we also found this kind of footprint on the machine farming road out of Wanzi, in the mud by a puddle, not only the same type of pattern, but also the black mud in the gutter.

According to this analysis, after the perpetrator fled the scene of the center, he left along the machine farming road and then onto the Dongtong Highway, and it can also be inferred that the perpetrator was on foot and had no means of transportation......"

"Xiao Cao, you speak slowly, don't be in a hurry." Detachment Ai lit another cigarette and said with a smile.

"Thank you, Ai detachment." After Xiao Cao finished speaking, he continued:

"If we solve the route to go, we have to solve the route to come. Based on our investigation and analysis, we believe that the route to go is the route to come. The reasons for this are as follows:

Huang Yuying's house is located on the east side of Wanzi, and the time of its discovery is about 5 o'clock in the morning today, while Huang Rongzhi's house is located on the west side of Wanzi, and the time of its discovery is about 6 o'clock this morning. In addition, one thing that can be corroborated is that the machine farming road leads west to Cheng Simao Bay in the same village, which means that this is a dead end.

After solving the route of the perpetrator's comings and goings, we still return to the traces and physical evidence at the scene. Xiao Ke, please show the plaster model of the footprints on the spot to the leaders and comrades. ”

Xiao Ke immediately left his seat and showed everyone the footprints, Xiao Cao took the opportunity to drink water, and after seeing the footprints, he continued:

"This is the footprint of a liberation shoe, which is relatively mutilated, only the forefoot part. After Captain Li's comparison, it is consistent with the palm width of the sock prints extracted from the scene of Zheng Xiumei's rape in Zhengjiawan, Dating Village, Copper Mining Village, on 1997.05.24, and there is no obvious difference in principle.

The second trace is bloodstains. As I mentioned earlier, Huang Yuying's house has a total of eight rooms, large and small, and we found spotted blood stains on the bed in the east outer room, while the other rooms did not, so we determined the central scene. The blood stain was supposed to have dripped from the victim's injuries on the sheets.

In bed, we found not only blood, but also hair. THERE ARE TWO TYPES OF HAIR, ONE IS HAIR ABOUT 15CM LONG, WHICH IS CONSISTENT WITH THE LENGTH AND COLOR OF HUANG YUYING'S HAIR; THE OTHER TYPE OF HAIR IS ABOUT 5CM IN LENGTH, WHICH IS SHORT AND STRAIGHT. After Captain Li and I reviewed the victim, she reported that she was the only one sleeping in the bed for a long time. Therefore, it is certain that this short hair was left by the perpetrator.

Fourth, it is fiber, which is basically the same as what Captain Ke introduced.

That's all I have to say, thank you, leaders. ”

After Xiao Cao finished speaking, he sat down.

"Ai detachment, how do you feel?" Director Zhang asked with a smile.

"Haha, I really didn't expect your Dongyang County technical team to change so much, no matter whether the conclusion analysis is right or not, a small technician can analyze the head to the head, which is very good! Very good! That little Cao, what's your name? Ai asked.

"Report to the Ai detachment, my name is Cao Tingbao." Xiao Cao hurriedly stood up and replied.

"Sit down, sit down." Ai Detachment raised his hand and pressed it down.

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