Criminal Investigation Notes

Time passed quickly, and in the evening, the weather became stuffy again. The air was full of sticky and greasy. A thunderstorm would not fall. At 6:30 p.m., Song Wen gathered all the relevant personnel for a meeting and called Lin xiuran, who had just returned from the hospital.

The atmosphere in the conference room was heavy for a moment. Everyone did not expect that, just when the case was about to be clear, they were in a dilemma. Without key witnesses and material evidence, all they can prove is that Lin wanwan knew about Guo's possession of poison.

What happened that night?

The relevant cases have been looked over several times, and all the people are tired. Song Wen lists all the relevant information and derivation process of the case on the whiteboard.

On the left side of the whiteboard is the derivation process and criminal motive of the assumption that Guo Zhen is the principal offender. On the right side of the whiteboard is the derivation process of assuming that Lin wanwan is the principal offender. In a corner under the whiteboard, the others are written.

There is a clear line on the left, but there are few cases on the right. Song Wen draws a question mark and then draws a circle on Lin wanwan's name: "Lin wanwan's affair has not been found out. Let's assume that if things are different from what Lin wanwan said, Guo is an accessory, or Guo is not aware of the situation, and Lin wanwan is the main culprit. Then why does she want to kill her classmates, How to kill his classmates with Guo's chocolate and poison

When asked this question, everyone was silent. Fu Linjiang lowered his head, and Zhu Xiao was beside him. Lao Jia was a little listless, and the Lushi language was silent. What they knew now, they could not reach any conclusion.

Zhu Xiao quickly sorted out the testimony of the surrounding witnesses. Some details were beyond Song Wen's expectation. He thought that it might be a matter of time for Lin wanwan to change his working place frequently, or he was dismissed by his boss. However, during their investigation, it was found that almost all the work was done by Lin wanwan himself, and he refused to ask the boss for a raise Stay.

This girl is like adding social experience to those shops with her mood.

In their telephone investigation, all people reported that Lin wanwan was docile, modest and silent. It seems that apart from telling a lie to them once, he is innocent.

"Let's go through all the evidence again." When the case reached a deadlock, Song Wen could only begin to sort out the relevant evidence.

Xu Yao said, "Xiao Cheng, bring all the photos. We'll go over it again."

After a while, Xiao Cheng copies all the materials and starts to show the scene's evidence pictures one by one on the slide projector. When people see any doubts, they will ask questions. Waiting for the picture to play to the quilt that has been held by Ma Aijing, Lin xiuran frowned slightly and pointed to one of the corners and asked, "what is that?"

Xiao Cheng enlarges the photo of the scene, and you can see that it is the quilt head with two oval Brown marks. The two elliptical points are almost parallel, one horizontal and one vertical. It's about ten centimeters apart.

"It could be chocolate marks that rub up." Xiao Cheng enlarged a little more, which made it clear.

"No, it wasn't rubbed up." Lin xiuran walked forward a few steps and called out the photos of Ma Aijing's death. At first, Ma Aijing's quilt covered the lower half of her face. The position looked more obvious, and it was not far away from the victim's ear.

Lin xiuran made a demonstration action: "it was left by the chocolate on the finger of the right hand when the suspect pressed the quilt tightly."

When he said this, everyone was shocked. They searched for material evidence before confirming the cause of death. At that time, they focused on looking for things related to poison, but ignored it. There were traces left around the suffocated victim.

Xiao Cheng rushes to the evidence room and holds the quilt. Along the direction of the fold on the quilt, the two marks are just left by the suspect holding the quilt tightly and pressing down.

"It's not someone who wants to lift the quilt, is it?" Fu Linjiang looked at the trace.

"No Xu Yao took it up and looked at it carefully. As an expert in trace science, she immediately concluded, "this trace can only be created by holding the quilt tightly and pressing it hard. In the corresponding position beside the quilt, there are the same wrinkles, which shows that the murderer grasped the quilt with two hands and went down together. Chocolate should be covered when the sugar heart is wet, so it has penetrated into the texture of the quilt. In short, this trace must be left by the murderer of Ma Aijing

Song Wen asked Xu Yao, "is this trace worth extracting?"

Xiao Cheng quickly dodges to one side. Xu Yao lowers her head, carefully examines the two traces, and thinks, "there are enough chocolates to extract, but the fibers on this quilt are not enough to extract fingerprints. That is to say, even if these two traces are found, we can not prove whether they were left by Guo Zhen or Lin wanwan. "

Now the methods of fingerprint extraction have been changing with each passing day, conventional powder or magnetic powder, physical and chemical, and even more advanced ninghaidelin or fluorescent reagent, but no matter which method, are not enough to extract these two fingerprints.

This sentence, let everyone fall into silence, just found a little hope of fire, so extinguished.Lu Si Yu gazed at the evidence photos printed on the table, and his lips gently pursed. At the scene, they had reasoned and deduced some relationships between the characters. But now, he had a little doubt about his reasoning. He suddenly felt that what he saw was what others wanted him to see, clean and deliberate These things are like fog, hiding the motive of crime.

Thinking of this, Lu Si Yu blinked his eyes and said, "I think we are now walking into a misunderstanding. We are all persistent about what happened that night. But I think what should be explored is what happened in these four years, what happened in this dormitory, and what kind of people they are."

Four years, a dormitory, get along day and night, a word, an action, there may be contradictions or intensification, today you are friends, tomorrow may quarrel, this relationship, absolutely not a few other dormitory girls can see through. But now, the direct parties have died, they can only from the surrounding environment to explore, to explore, to speculate.

Lao Jia said: "no, isn't that clear? Guo's poisons and chocolates she bought are enemies with them. If you want them to die, I just can't understand. Why do you have to suspect Lin wanwan? What do we suppose? "

Song Wen thought for a moment and said, "there are still some doubtful points in the case. We'd better check it more carefully. Zhu Xiao, we'll work overtime in the evening and do a family follow-up call. Make sure that every family understands. "

Zhu Xiao nodded: "yes."

Song Wen put the cap on the pen and said, "I'll try it again later. If you think about it, there's a breakthrough. "

Breakthrough point Can ask the truth of the new breakthrough point, for a moment all the people frown and contemplate.

Song Wen turned to look at Lu Siyu. He bowed his head and frowned slightly. His handsome face became more and more pale. He seemed to be lost in meditation. When he found Song Wen's eyes, he raised his head slightly and said, "I think we can try her out."

"With what trial?" Song Wen looks at him sideways.

"With Guo Zhen." Lu Si Yu looked at him with sharp eyes. Now, only the police can know about Guo's state. If Lin wanwan's description of that night contains lies, she may be the last person who wants Guo to wake up.

Fu Linjiang immediately agreed: "I think this plan is feasible, and we don't have any better methods now. It is estimated that only with the cooperation of forensic doctor Lin, can we perform the trick really."

Song Wen nodded and agreed to the plan: "let's check the process."

After the simple arrangement, Song Wen arranged various time points, considered for a moment and said, "I'll come first. After I go out, Lao Jia will come in and you will judge her."

Lu Si Yu was surprised by the arrangement: "why Lao Jia?" He didn't think about it. He has not had much communication with Lao Jia these days. This old criminal policeman is obviously not a good helper to cooperate with, and he has been insisting on Lin wanwan's innocence, so he can't cooperate with him very well. However, when he asked this question just now, he felt a little disgusted, and it was like robbing Lao Jia before revenge. Lao Jia looked at him and did not speak.

Song Wen explained: "just now several of us went in and asked. She and Lao Jia talked the most and looked most relaxed. I want to put her in a comfortable environment as much as possible."

Lu Si Yu nodded and agreed to the arrangement of Song Wen.

After making arrangements, Lu Siyu and song Wenxian enter the interrogation room. Lin wanwan has just had a short rest. He sees them come in, sits up straight and says, "good evening." There was no clock or window in the interrogation room, and all the ventilation was provided by a small exhaust fan. She was judged by her work, rest and biological clock. It was already evening, and she was asked in this narrow interrogation room for a whole day.

Song Wen didn't answer her. He sat opposite her and adjusted the light at the table. Lu Siyu sat aside and opened the book.

"Want to see what happened to your classmate after he died?" This time, Song Wen did not ask questions, but spread out a few photos and put them in front of her. The girls in the picture died with horror.

Lin wanwan's eyes drooped, not frightened, but also did not open. She hesitated for two seconds and said, "no, I was almost one of them."

Song Wen asked the second question: "at that time, you were the only sober person. Why didn't you report to the police at the first time? Don't explain with fear, said the doctor on the spot. You are very calm

Lin wanwan licked his lips: "at the beginning, I thought that everyone was just ordinary food poisoning. I opened the drawer to get medicine for the stomach and intestines. Then I thought, maybe the reaction of everyone now is the poison that Guo Zhen wanted before. At that time, I was very afraid and didn't call the police for a moment. Later, the poison broke out faster than expected, and when I wanted to call the police, the reaction was faster than expected The poison is in my body, so I can't react very quickly. I just have time to make an emergency call

Song Wen's eyes narrowed slightly: "these sounds like excuses and excuses."Lin wanwan shook his head gently: "I have nothing to justify. Everything I say is true."

Song Wen looked at her directly: "maybe it's just your way out of guilt."

Lu Siyu is listening quietly. Song Wen is trying to get Lin wanwan's mood back to the scene. He is constantly putting pressure on Lin wanwan.

Knock on the door sounded, and then the door lock turned, Lin xiuran reached in, "Song team, can you come out?"

Song Wen gets up. Lin wanwan also met Lin xiuran when he was in the hospital. Knowing that he is a forensic doctor, his eyes follow him out of the interrogation room. Lin xiuran and Song Wen are talking outside, but they can hear a little inside.

"Hospitals Telephone Guo she Well, wake up. As soon as you can Confession Maybe you can New evidence... "

The intermittent voice came in. Lu Si Yu's eyes, which had been drooping, raised slightly and looked at Lin wanwan in the opposite direction, catching the expression on her face.

She must have heard those conversations, the girl's face swept away tired and tired, but there is a faint It's hard to describe the Lushi language. It's a kind of strange expression.

At that moment, he realized that he might have taken the case too simply