Criminal Investigation Notes

After interviewing eyewitnesses, Song Wen and Lu Siyu went to the forensic office on the second floor of the Municipal Bureau. Recently, for this headache serial murder case, the forensic doctor also started working overtime, especially the case that just happened this morning. By the afternoon, the autopsy report had come out.

Now Lin Xiuran and other forensic doctors have gone out of the police, only the Dragon Boat Festival stayed to look after the house.

Song Wen didn't see it, and self-sufficiently went to collect the autopsy reports of the three cases and put them together in a line.Then open the photos and check them one by one.He had already seen these pictures and volumes during the morning meeting, and he planned to look through them again at this time.

Lu Siyu also picked up the information of the first case and sat quietly and watched.

At this point in the Dragon Boat Festival, I had just eaten, and I ate a bowl of pork liver noodles next to me, which made the entire forensic room smell like food.He watched Song Wen and Lu Siyu watch attentively, and moved a stool to sit next to him: "Song Team, I have always been interested in your criminal police to solve crimes. Your team always solves crimes quickly and accurately. Or teach me... "

Song Wen didn't lift his head, he continued to organize the information in his hand, and said, "It's not that difficult. You can try to apply with Brother Lin to see if he will let him go."

"Oh, I'm just kidding." The Dragon Boat Festival spoke carefully and looked at it carefully, making sure that Lin Xiuran did not suddenly come back. Then he continued, "Team Song, these victims died of suffocation. The cause of death is simple and clear. The corpse was personally examined by Director Lin. The Tian team had looked through the information many times before, and the corners were crumpled, and nothing new was noticed."

Song Wen flipped through the information: "If you can't see anything, he is stupid."

"No... I mean, can the case be solved by reading these again?" Duanwu asked his question.

Song Wen finally raised his head and glanced at him, "Do you know what it means to read a book a hundred times? I am looking at the information now because we have not been to the scene in the first two cases. If we have been to the scene, many scenes The information of the censorship has been imprinted in my mind, and now I can only make up the lesson by looking at the materials. If you want to solve the case, you have to memorize these basic information."

Having said this, Song Wen touched Lu Siyu who was on the side, and his voice lowered by an octave without realizing it, and softened: "Look at this photo, I think this first victim and the other two It's not the same."

Lu Siyu turned his head to look, and Dragon Boat Festival also leaned over curiously.

That is a detailed picture of the wound on the neck of the first victim. Song Wen's finger pointed at the wound on the victim's neck.The pale neck was swollen and had a lot of red bruises, which looked a bit more serious than the second and third place.

"Hey, the reason is that the body of the first victim was placed for two days. By the time we arrived, it was already swollen and rotting..."

Before the Dragon Boat Festival was finished, he was interrupted by Lu Siyu.He took the photo and looked at it carefully, then nodded to Song Wen and said, "Yes. The first case is really different."

Dragon Boat Festival suddenly felt that his face hurt from being beaten, but his eyes widened and he couldn't see anything abnormal: "This...Where is it different?"

Lu Siyu explained: “In general, the strangulation is deeper, wider and more even than the other two. Such scars may not be caused by one strangulation, but by multiple strangulations. It's just that each time the strength is not great, and the body was already swollen at the time, so it is not very obvious.

In other words, those red marks are not two lines one after another, but multiple lines, connected together.As a result, the scars formed are wider and more obvious.

During the Dragon Boat Festival, he flipped through the other two scrolls. As Song Wen said, he did not expect that these two people would find something in the previous scrolls so quickly, and he suffocated a compliment: "Song team, you observe The power is really good..."

Song Wen didn’t have time to return to the Dragon Boat Festival’s compliments, and discussed the case with Lu Siyu: “That means that the first victim was probably not strangled and killed once. He may have been strangled to coma several times, and the murderer took her. As a toy, Le fainted and played for a while, and then she woke up and attacked again. There may be three or four such behaviors. Relatively speaking, the second and third cases are more aggressive."

This way of killing is undoubtedly long and tormented. The victim is repeatedly injured, extremely desperate, unable to break free, as if in a hell.It may be more painful than killing her directly.

"It's not necessarily intentional." Lu Siyu blinked, biting his nails and inferred, "Perhaps, he didn't make up his mind to kill the victim in the first place; maybe he was enjoying this kind of cat playing with mice. It’s fun; maybe, the first female victim reminded him of someone, which induced him to commit the crime; maybe, there is another reason we don’t know now."

This first case is indeed something special. What kind of cruel and perverted person is this murderer?Lu Siyu became more interested in him.He closed the dossier and said, "I want to go to the place where the previous two crimes occurred."

Song Wen and Lu Siyu asked Fu Linjiang to stay in the police station. The two drove out the police car. The police car drove all the way, first to the location where the first woman was killed, which was by the river in Lianhuatang.The greenery around here is very good, it is a river, but a small ditch two meters wide.

Now that a few months have passed, the traces on the river bank have long been wiped out by the wind, sun and rain, and people pass by from time to time during the day, and it's quite fragrant.

When he arrived at the location, Song Wen took out the photos of the scene and compared them before daring to confirm it was here.

The two went around, and Song Wen asked Lu Siyu: "Anything to find?"

Lu Siyu licked his lips: "I'm thinking about a question, why is the first victim too old..." He pondered for a moment, recorded it in his notebook, and replied, "Maybe... it was with the murderer. Oedipus in the subconscious has a relationship."

Then Lu Siyu made a mark.The two people simply performed a simulation at the scene, and calculated the time and path of the crime. The next step was to rush directly to the location of the second crime. The two locations were not too close or too far apart. They drove there for approximately It took twenty minutes.

Then came the third time. Song Wen believed that the third attack should be in the small park behind Zeng Minyi’s community. This place happened last night. They also found physical evidence in the afternoon. The staff just left.There are still some messy fighting marks on the ground, as well as one or two blood stains, everything is consistent with Zeng Minyi's testimony.

Finally, it was the fourth place, where Wang Xiaopei was killed. They had been here this morning.

Four victims, four locations where the crime occurred.

Song Wen's car followed the murderer around the city, and when he was done, it was nearly six in the afternoon.

The two returned to the car, and Song Wen started the driveway: "Let's go home, you didn't have much rest this morning."

Lu Siyu gave a hmm, looking down at the map, his expression was very focused: "The murderer should be familiar with this city, and often walk around in these places, so the chosen location seems random, but in fact, it is only some time at night. In a very quiet location, he may have been lurking nearby for a while, waiting for the victim to enter his attack range, which suits his preferences."

Then Lu Siyu looked for the murderer’s starting point between several points: "Assuming that the murderer started from home, then he needs to go back and forth, especially yesterday, when he failed his first crime at 11 o’clock in the evening, and then I bandaged the wound bitten by the dog, and appeared at another place to attack the victim more than three o'clock in the morning. I was thinking about the means of transportation used by the murderer to move between these locations."

Song Wen thought for a while: "From the description of previous witnesses, the murderer had a cocoon on his hand. He was obviously a manual laborer, and his clothes were also very ordinary... I tend to have no vehicles or other means of transportation."

Lu Siyu nodded in agreement: "Tian Ming had searched for surveillance video for a long time. If the murderer was driving or taking a taxi, he would be found, leaving traces...so the rest, bicycles, night buses... were bitten by dogs. After the injury, based on the size of the wound, it was concluded that his injury was not minor. In this case, it would be difficult for him to move. Walking and cycling can basically be eliminated."

He frowned when he said that, "As well as his pending co-worker, the theory that Zhuang Yi said before, I always feel that some parts are a bit reasonable, but there are some problems."

Song Wen continued to drive the car: "Let's follow these clues to investigate. I think the city bureau may not have enough police force. When I turn back, I will apply to the bureau to inspect the nearby area."

He thought for a moment and said, “You need to call the night bus to monitor, pay attention to the 24-hour clinic nearby. The visit takes time, and there may be some results. However, for the night bus, the camera is not clear and there are blind spots. I can check it out."

Lu Siyu drew a circle on the map again. The murderer was obviously not a "fleeing attacker", but a "waiting hunter". According to the "criminal circle hypothesis theory", the murderer had a high probability of living here. Within range.

The so-called crime circle is the circle formed at one time by the straight line distance between the two cases with the farthest geographical location as the diameter, and the center of the line as the center of the circle.

And within this range, there are a demolition building, several shanty towns, a bus terminal, several residential areas, many construction sites, a very large wholesale farmer’s market, and the only wharf in Nancheng.

The scope is still too big...

Song Wen drove the car, Lu Siyu pondered the case and looked out the window. The two fell silent for a while.

At dusk outside the window, it is the peak of getting off work and dining. Adults get off work, children get off school, old people prepare for square dancing, ordinary people enjoy the fun of life, and the whole city is in peace.

Many people don't know that there is now a murderer in this city.He was eating the same food, drinking the same water and breathing the same air as them.

He may be hiding in a corner of the city, he may be a peddler who buys fruits on the street, a construction worker carrying steel, or a man sitting on the side of the road.

Three women have already died under his hand, and soon, there may be more victims...

Because of the case, both of them were worried and the pressure was too low. Song Wen couldn't help asking Lu Siyu: "Then what...what to eat at night..."

"See what you want to eat?" Lu Siyu casually said: "Red beef stew? Tianma chicken soup? Panlong eggplant? Hot spring egg tonkotsu udon noodles?"

"Anything will do." Song Wen nodded quickly, and his saliva was almost gone. He added: "The case has not been solved yet, so don't work too hard. Just do something simple. Today, the bureau made a speech. In the evening, Zhu Xiao’s information will be brought over, and we have to check it out.” He paused and said, “Anyway, as long as you make it, I love it.”

Lu Siyu hummed: "When the case is resolved..."

As soon as the two men drove the police car into Lu Siyu’s community, Fu Linjiang’s phone number arrived, Song Wen pressed the release, and Fu Linjiang’s voice came out: "Song Team, we have some conditions here. Family members of the last deceased. , That is, Wang Xiaopei’s parents, who had just admitted the corpse in the afternoon, and then... they told the reporter the news of their daughter’s murder. Just now, a group of media came in to cover the case." He paused, "Moreover, Even worse, someone posted the statement that the police suspected that there were two murderers online..."

Song Wen frowned. Those are still under investigation, especially the theory of multiple murderers. Although there is now the theory of Zhouyi and the vague testimony of witnesses, it still cannot be used as a basis for the verdict. How could this matter let outsiders Does anyone know?

Song Wen asked: "Then how did Gu Juju deal with it?"

"Seeing that things can't be sealed off, he just called us in the bureau for a meeting. Zhuang Yi was also there. There was an urgent discussion at the meeting. Then Gu Bureau thought of a way. He heard that Zhuang Yi will be recording soon. A program. On the program, I want Zhuang Yi to disclose case information and profile to the public, and publish the portrait of the criminal."

Song Wenyi felt that this behavior was too risky: "This may make the case change. It will also cause public panic."

Fu Linjiang said: "Yes, Professor Zhuang disagreed at first. He said that his previous analysis was originally a theory, and there is no more evidence to support it. It should not be made public just because of some remarks."

Song Wen also understood this line of thinking, and asked, "What then?"

"Gu Ju said that now the online quarrels are very fierce, and the media already knows that instead of letting the media write, it is better to tell them everything. Public criminal profiling is also a common method in criminal investigations at home and abroad, and media disclosure will put pressure on the murderer. There are some cases in China that have done this. For example, the male dormitory murder case that shocked the whole country before, and the murder case of a college student who killed his mother. Some disclosures were made to the media very early, and the public's report also played a role in the subsequent pursuit and escape. Some positive effects."

"Professor Zhuang agrees?"

"Finally I was persuaded by Gu Ju." Fu Linjiang said again, "Anyway, it's basically settled now, and the superiors have also instructed it. Gu Ju asked me to say hello to you."

Song Wen hummed, and hung up the phone with a few polite words.

"The situation has expanded now, and hiding it is not a way." Lu Siyu whispered from the side, the more evasive at this time, the more counterproductive, "Since you can't stop it, let them go, and this It’s also a good thing to do. When people are vigilant, it can also reduce the incidence of murder.

Song Wendao: "I understand that publishing the information will be beneficial to the visit. You can open a reporting hotline, set up a bounty, and see if there are more clues. But I am still afraid of stimulating the murderer."

Overall, there are pros and cons to this matter.Just making the news public will increase many unstable factors.So far, there is only a gamble.

"You don't have to worry too much." Lu Siyu said, "If you don't disclose the news, the murderer will not stop killing. After the news is made public, he will become passive regardless of whether the murderer is active or not. It's just that I think..."

When he said that, he said nothing more.

"What do you think?" Song Wen heard something in his words.

"I think... it seems to be deliberate to disclose the case information to the media and the police investigation." Lu Siyu said softly. This is just a vague feeling from him, and there is no actual evidence. Some people seem to I want to make this case bigger online and in the media.

Song Wen frowned slightly. Are these deliberate manipulations from behind?

The people's memory and energy are limited. This case quickly overwhelmed the former Wushan nursing home and the Christmas car accident.

There is nothing more attractive to the public than a serial murderer who suddenly appeared.

So, behind this, is someone diverting people's attention?

Is the appearance of Zhuang Yi accidental?