Criminal Investigation Files

Time passed quickly, and at night, the weather became dull again, the air was full of stickiness, and a thunderstorm was about to fall.At 06:30 in the afternoon, Song Wen gathered all relevant personnel for a meeting, and specially called Lin Xiuran who had just returned from the hospital.

The atmosphere in the conference room became tense for a moment.No one expected that just when the case was about to become clear, they fell into a predicament.There were no key witnesses, no key physical evidence, and all they could prove was that Lin Wanwan knew about Guo Hua's possession of the poison.

What happened that night?

The relevant case files have been reviewed several times, and everyone is tired. Song Wen listed 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 assuming that Guo Hua is the principal criminal. On the right side of the whiteboard is the derivation process of assuming Lin Wanwan is the principal criminal. In a corner below the whiteboard, other is written.

The thread on the left is clear, but the situation on the right is rare. Song Wen drew a question mark, and then drew a circle on Lin Wanwan's name: "Lin Wanwan's matter has not been found out yet. Let's assume that if the matter Contrary to what Lin Wanwan said, Guo Hua is an accomplice, or Guo Hua didn't know about it, and Lin Wanwan was the principal criminal, so why did she kill her classmate, and how did she use Guo Hua's chocolate and poison to kill herself? classmate?"

When this question was asked, everyone was silent. Fu Linjiang lowered his head, Zhu Xiao also leaned beside him, Lao Jia was a little listless, and Lu Siyu didn't say a word. They couldn't draw any conclusions with what they knew now.

Before that, Zhu Xiao quickly sorted out the testimonies of the surrounding witnesses. Some details were beyond Song Wen's expectations. He thought it might be a matter of time for Lin Wanwan to change places of work frequently, or because she was fired by the boss, but During their investigation, they found that Lin Wanwan resigned from almost all the jobs, and refused the bosses' salary increases to keep them.

This girl seems to increase her social experience in those shops according to her mood.

During their telephone investigation, everyone reported that Lin Wanwan was docile, humble, and quiet.It seems that except for lying to them once, there is no blemish on his innocence.

"Let's look at all the physical evidence again." When the case reached a deadlock, Song Wen could only start sorting out the relevant evidence.

Xu Yao said: "Xiao Cheng, bring all the photos, let's go through them again."

Not long after, Xiao Cheng copied all the materials, and began to show pictures of the evidence on the scene one by one on the slide projector. Everyone would ask questions if they saw any doubts.When the photo played to the quilt that Ma Aijing had been hugging all this time, Lin Xiuran frowned and pointed to one of the corners and asked, "What is that?"

Xiao Cheng enlarged the photo of the scene, and it can be seen that there are two oval brown marks on the head of the quilt.The two oval points are almost parallel, one horizontal and one vertical.About ten centimeters apart.

"It might be the mark of the chocolate rubbed on it." Xiao Cheng zoomed in a little more, and now he could see it much more clearly.

"No, I didn't rub it up." Lin Xiuran stepped forward a few steps as he spoke, and called out the photo of Ma Aijing's death. At first, Ma Aijing's quilt covered the lower half of her face, and that position looked more serious. It is obvious that it is not far from the victim's ear.

Lin Xiuran made a demonstration action: "It was left by the chocolate stained on the finger of the suspect's right hand when he pressed the quilt tightly."

When he said this, everyone was shocked. They searched for physical evidence before confirming the cause of death. At that time, they focused on looking for things related to poison, but they ignored it. The victim who was smothered to death also left traces.

Xiao Cheng hurriedly ran to the physical evidence room, carried the quilt over, and followed the direction of the creases on the quilt. Those two marks happened to be left when the suspect held the quilt tightly and pressed down.

"Isn't it because someone wanted to lift the quilt?" Fu Linjiang looked at the traces.

"No." Xu Yao picked it up and took a closer look. As an expert in trace science, she immediately came to a conclusion, "This trace can only be formed by grasping the quilt tightly and pressing hard. The corresponding position next to the quilt also has the same wrinkles, indicating that the murderer grasped the quilt with both hands and lowered it together. The chocolate should have covered it when the candy center was wet, so it penetrated into the texture of the quilt. In short, this trace It must have been left behind by the murderer who killed Ma Aijing."

Song Wen asked Xu Yao: "Is this trace worth extracting?"

Xiao Cheng hurriedly moved aside, Xu Yao lowered her head, carefully inspected the two marks, thought for a while and said, "There is enough chocolate to be extracted, but the fibers on this quilt are not enough to extract fingerprints. That is, even if After discovering these two traces, we cannot prove whether this trace was left by Guo Wei or Lin Wanwan."

Nowadays, the methods of extracting fingerprints are changing with each passing day. Conventional powder or magnetic powder, physical and chemical methods, and even more advanced Ninghai Delin or fluorescent reagents, but no matter which method is used, it is not enough to extract these two fingerprints. .

This sentence caused everyone to fall into silence again, and the spark of hope they had just found was extinguished like this.

Lu Siyu stared at the photos of the evidence printed out on the table, pursing his lips lightly. They had previously reasoned at the scene and deduced some relationship between the characters, but now, he had a little doubt about his reasoning. Suddenly, he felt that what he saw was what others wanted him to see, clean and deliberate... These things were like a fog, hiding the motive of the crime under it.

Thinking of this, Lu Siyu blinked his eyes and said, "I think we've fallen into a misunderstanding now, we're all obsessed with what happened that night, but I think it's these four things that should be explored more. What happened last year, what happened in this dormitory, and what kind of people they are."

Four years, one dormitory, getting along day and night, one word, one action, may lead to conflicts or intensification. Today you are friends, and tomorrow you may quarrel. This relationship is definitely not something that a few girls in other dormitories can see through.But now, the direct parties have passed away, and they can only investigate, excavate, and speculate from the surrounding environment.

Old Jia said: "No, isn't that clear? The poison Guo Hua hid, the chocolate Guo Hua bought, Guo Hua has a grudge against them and wants them to die. I just don't understand. Why do you have to doubt Lin? Wanwan, what are we assuming that she hasn't done?"

Song Wen thought for a moment and said: "There are still doubts in the case. Let's investigate more carefully. Zhu Xiao, we will work overtime at night and make family follow-up calls. Every family must understand clearly."

Zhu Xiao nodded: "Yes."

Song Wen put the cap on the pen, "We'll have another trial later. Think about the breakthrough point."

Breakthrough point... a new breakthrough point that can ask the truth, and everyone frowned for a moment.

Song Wen turned to look at Lu Siyu, he lowered his head, frowned slightly, his handsome face became paler, as if he was lost in thought, when he found Song Wen's gaze, he slightly raised his head and said: " I think we can try her out."

"What kind of temptation?" Song Wen looked sideways at him.

"Use Guo Hua." Lu Siyu looked straight at him with sharp eyes.Now, only the police can know Guo Hua's status. If Lin Wanwan's description of that night contains lies, then she may be the last person who doesn't want Guo Hua to wake up.

Fu Linjiang immediately agreed: "I think this plan is feasible, and we don't have any other better method now. It's just that we need the cooperation of Forensic Doctor Lin to perform the trick more realistically."

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

After the simple arrangement, Song Wen arranged various time points, thought for a while and said, "I'll come first later. After I go out, Lao Jia will come in. Lu Siyu, you interrogate her."

Lu Siyu was a little surprised by this arrangement: "Why Lao Jia?" He asked this question without thinking too much, and it felt inappropriate to say it.In the past few days since he joined the company, he hasn't had much communication with Lao Jia.This old criminal policeman is obviously not a good helper to cooperate with, and he has been insisting that Lin Wanwan is innocent, so he will definitely not be able to cooperate well with him.But when he asked just now, he felt a little disgusted, and it seemed that he was robbing him before taking revenge on Lao Jia. Lao Jia glanced at him and didn't speak.

Song Wen explained: "A few of us went in to inquire separately just now, and she talked the most with Lao Jia, and her expression was the most relaxed. I wanted to put her in a comfortable environment as much as possible for testing."

Lu Siyu nodded and agreed to Song Wen's arrangement.

After making the arrangements, Lu Siyu and Song Wen first entered the interrogation room. Lin Wanwan had just had a short rest when she saw the two of them coming in and sat up straight, saying, "Good evening." Is there anyone in the interrogation room? Clockwork, no windows, all ventilation is by a small exhaust fan.She judged the time by her schedule and biological clock. It was already night, and she was questioned in this small interrogation room for a whole day.

Song Wen didn't answer her, but sat opposite her and adjusted the lamp by the table, while Lu Siyu sat aside and spread out his notebook.

"Want to see the tragic situation after your classmate's death?" This time, Song Wen didn't ask, but spread out a few photos and put them in front of her.The girls on the screen died shockingly.

Lin Wanwan's eyes drooped down, she wasn't frightened, but she didn't open them either. She hesitated for two seconds and said, "No need, I was almost one of them."

Song Wen asked the second question: "You were the only one who was awake at the time, why didn't you call the police immediately? Don't explain it with fear. The doctor who was there said that you were extremely calm."

Lin Wanwan licked her lips: "At the beginning, I thought everyone was just suffering from food poisoning. I opened the drawer to get the medicine for the stomach, and then I thought about it. Maybe everyone's reaction now is because Guo Hua asked for it before. At that time, I was very scared and did not call the police as soon as I hesitated. Later, the poison took effect faster than I imagined. When I wanted to call the police, the poison was in my body, so I could not respond quickly. It was only in time to call an ambulance.”

Song Wen's eyes narrowed slightly: "These sound like excuses and excuses."

Lin Wanwan shook her head lightly: "I have nothing to justify, everything I said is the truth."

Song Wen looked directly at her: "Maybe this is just your way of getting off."

Lu Siyu listened quietly at the side, Song Wen was trying to bring Lin Wanwan's emotions back to the scene, and he kept putting pressure on Lin Wanwan.

There was a knock on the door, and then the lock was turned, Lin Xiuran leaned in, "Captain Song, can you come out?"

Song Wen got up, Lin Wanwan had met Lin Xiuran when she was in the hospital, knew that he was a forensic doctor, her eyes followed him out of the interrogation room, Lin Xiuran and Song Wen were talking outside, the voice was not loud, but it happened to be heard inside a little.

"Hospital...call...Guo Hua and her...well, wake up, please hurry up...confession...maybe you can...new evidence..."

Intermittent voices came in, and Lu Siyu raised his lowered eyes slightly to look at Lin Wanwan opposite, capturing the expression on her face.

She must have heard those conversations, the tiredness and fatigue were swept away from the girl's face, instead there was a faint... Lu Siyu was a little indescribable, it was a kind of strange expression.

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