"How did the stepfather of the victim Sun Xiuwen rule out the suspicion?" Jiang Yuan waved his hand and motioned for forensic doctor Tang Feng to sit down.
The case was just beginning to be understood. After half a month, Jiang Yuan didn't seem to be in a hurry and asked slowly.
Cao Chujun moved his body, faced Jiang Yuan, and said: "The main issue is the time of the crime. The victim's mother testified that her husband was with her from 6 to 8 in the morning."
"Do the husband and wife testify against each other?" Wang Chuanxing saw that Jiang Yuan did not speak immediately, so he immediately raised a question. In such small-scale discussions, even a rookie police officer can usually interrupt, and occasionally he will not be criticized for saying something outrageous.
Cao Chujun smiled and said: "Although they are a couple, it is the victim's mother who testified, and there is some evidence."
"What evidence?" Wang Chuanxing asked.
"Condoms." Cao Chujun answered, and said more clearly, "At around 6 o'clock that day, the two had sex, and the condoms were thrown into the trash can. Evidence has been collected."
Wang Chuanxing was surprised: "Two hours?"
Cao Chujun looked at Wang Chuanxing strangely and said helplessly: "We were both awake before and after. The two of them had a conversation after last night. During the time of the victim's death, the victim's stepfather should not have had time to commit the crime."
"The time of death needs to be considered." Jiang Yuan suddenly said this, interrupting the communication between the two.
Cao Chujun was stunned, turned around and sat down.
Jiang Yuan's accuracy in judging the time of death has long been a legend in the field of domestic investigation. Back then, a photo revealed the omissions of experts in the capital on the missing gun case, and then he solved the backlog of cases that had not been solved for many years. His skills were astonishing.
, since then, there have been very few people who dare to question Jiang Yuan about the time of death.
Tang Feng, Changyang City's own forensic doctor, also hurriedly looked through the documents, not daring to say anything to question him.
Jiang Yuan himself said: "Before the case occurred, it was raining locally, which means that the temperature has dropped. When the temperature drops, the relationship between the body temperature and the time of death must be reconsidered. This is one of them."
Jiang Yuan looked at Tang Feng, and then said: "The problem of rigor mortis is the same. I won't go into details here, but looking at the body surface characteristics of the corpse, the victim died earlier than expected. The most important thing is
…”
Jiang Yuan took the remote control, put a few pictures on the PPT, and said: "The state of these insects can better explain the local temperature state, especially these nymphs... I judge that the victim's death time should be
It was between 3 and 4 o'clock in the morning that day."
This is equivalent to pushing the time forward by three hours, and the previous investigation may have to be overturned and restarted.
Tang Feng said hurriedly: "Captain Jiang, I'm not questioning it, but when it comes to measuring liver temperature, I feel like it's not easy to make mistakes."
"You measured the liver temperature too few times, and it was a little late. In addition, the area where the body is located is just under the cliff, and the temperature is much lower than the normal road temperature..." Jiang Yuan explained why.
The reason for the error.
Tang Feng quickly understood: "There are some inadequacies in the plan we used... So what do you think is the best way to judge the time of death?"
He still wants to learn.
Jiang Yuandao: "From the current perspective, it is insects. Although the first scene is not here, the deceased's body was left in the wild for a long time. There are many types of necrophilic insects. Using forensic entomology, the judgment will be more accurate."
Tang Feng smiled bitterly. Although forensic entomology is simpler than forensic botany, in terms of pure difficulty, it is not as good as forensic anthropology. However, this kind of thing is still an obvious out-of-class topic. The average forensic scientist can learn a little bit, but basically not.
More in-depth understanding.
In short, as far as the forensic doctors here in Shannan Province are concerned, most of the forensic doctors in prefectures and cities do not even have LV1 forensic entomology technology. Changyang City is no exception. Instead, there are several small cities and counties.
Forensic doctors may be bored in their free time, or they may learn some forensic entomology by themselves due to some opportunity.
Cao Chujun didn't have time to deal with Tang Feng's emotions and said directly: "In this case, the time of death will be between 3 and 4 in the morning that day! In this way, the victim's stepfather returns to the list of suspects!"
Jiang Yuan held a new PAD, flipped through some photos, and nodded: "It can be corrected this way."
If it was a purely current case, he could look at the corpse and study it. For the current case half a month ago, this condition was no longer available. He could only make a judgment by looking at the photos, so it was more difficult.
Tang Feng naturally didn't hesitate. Although he was also a forensic doctor from the Changyang Municipal Bureau and sometimes provided support to local city and county forensic doctors, compared with a national boss like Jiang Yuan, he could only continue to adhere to the principle of "I am a primary school student".
attitude.
Cao Chujun stood up: "In this case, I will immediately send someone to bring the victim's stepfather over. In addition, I will organize people to re-investigate the victim's home. If the stepfather committed the crime, the first scene is still very likely to be at his own home. However, the first time
There were no obvious traces or findings during the survey..."
As he spoke, he looked at Jiang Yuan.
Jiang Yuan smiled and said proactively: "Then I'll go to the victim's house and take a look. I'll also take a look at the place where the body was dumped."
"Okay! Great!" Cao Chujun responded quickly.
On-site investigation is the same as forensic examination. If the first time there is no result, it will be more difficult to get the result the second time. Especially now that more than ten days have passed, if the suspect has further cleaned the home, he wants to find out something.
When the evidence came out, Cao Chujun was not very confident.
By the way, Jiang Yuan took people into the car and set off for Hualing Township. The Criminal Division Center of the Changyang Municipal Bureau also sent two vehicles to accompany them. Together with the two vehicles from the Criminal Police Detachment, the entire convoy drove out a total of ten vehicles.
car.
Watching the mighty team leaving the yard of the criminal police detachment, Yu Wenshu stood in front of the office window, and a sentence suddenly came to his mind: I have never fought such a rich battle.
Looking at this situation, Yu Wenshu felt that if he needed to arrest someone in the future, he would not need anyone from his own criminal police detachment.
Seeing the convoy moving away, Yu Wenshu couldn't help but chant a poem: "...Three years of visiting the rivers and seas, hundreds of battlefields in the world. Who can quit being drunk and drown in the clear rivers of Zhangzhou?"
This is "Night Drink" by his favorite poet Li Shangyin. The reason why he liked Li Shangyin at first was because Li Shangyin's poems were complex enough that others could not memorize them, but he could easily remember them at a glance.
Yu Wenshu recalled Jiang Yuan's performance in the conference room just now, and couldn't help but think: This person is like me!
…
Hualing Township.
Sun Xiuwen's house is a two-story self-built house. The door of the large courtyard is directly adjacent to the rural road. When you open the courtyard door, you can see the road. However, there are few pedestrians and vehicles on the road, so it feels quite clean.
The whole village is sparsely built and is basically a long strip. Some houses are built more densely. Most of them are the houses of several brothers, or the houses of several brothers from the previous generation.
The village has long been connected with water, electricity and internet, and it is a township below the provincial capital. It only takes 20 minutes to ride a motorcycle to the nearest town, and less than 10 minutes to the nearest market. Life is not inconvenient, but as far as the village itself is concerned, it is still
It has a feeling of being remote and desolate. Especially when a lot of farmland is abandoned, places a little further away from the village are covered with grass half as tall as a person.
The place where Sun Xiuwen dumped her body was right on the roadside. To a certain extent, it was a little careless. If the murderer was willing to walk more than ten meters further, he would probably have to rely on smell and luck to be discovered.
But from another perspective, this is also a smart approach. Just dump the body a few meters away from the roadside. The dumping itself will leave very few traces. It rained again, and the trace inspection team found almost nothing.
Useful information.
At Sun Xiuwen's house, Jiang Yuan, who was trying his best to find the first scene, still couldn't find it.
Sun Xiuwen lives in a room on the east side of the two-story house. The interior furnishings are also very simple, including a bed, a table, a bookcase, a wardrobe, etc. If there is anything special, it is just some girls' dolls.
At this time, even these dolls were turned out and checked one by one to see if there were any signs of suffocating the victim.
"Have you cleaned or replaced the bedding and pillows in this room?" Jiang Yuan called the victim's mother over and asked.
The victim's mother was only in her 30s. She cried so hard that she shook her head vigorously: "No. After Wenwen left, I never touched anything in the room. The room has been locked for the past few days."
"Where is your husband? Has he changed or thrown away anything?"
"No, I won't let him move."
Jiang Yuan couldn't ask any more questions at this point, so he had to ask the victim's mother to leave, and he started pacing in the room again.
He also looked at several other rooms in this house and found no trace of murder.
Assuming that the stepfather is the suspect, the probability that the room is the first scene should be very high. Because sexual assault cases between acquaintances often occur in places that one or both parties are familiar with, and murders that occur after 3 a.m., even if
The crime is in advance, and it's time for both parties to go to bed...
Jiang Yuan reluctantly scanned the room again. At this time, he saw several pieces of crumpled jeans in the closet.
Picking it up, Jiang Yuan couldn't help but frown.
Sun Xiuwen's room was quite tidy, but these pairs of jeans, not to mention folded and hung, still had some stains on them that had not been cleaned.
Jiang Yuan's thoughts moved, he turned around and pushed open the window, and looked out again.
The stains on the wall are indeed similar.
"Girl Lettuce!" Jiang Yuan waved to the two of them and asked them to take pictures.
