Criminal Investigation Notes

Lu Junchi never expected that Lan An's confession would be so easy and smooth.

He repeated in disbelief: "You said, you are... fine sand?"

It's like a problem that has been pursued for a long time and is going to take a lot of effort to solve, and suddenly knows that the answer is right in front of you, but people can't easily believe it.

Lan An seemed to have calmed down from the initial panic after being arrested. She accepted the fact, lowered her head and said, "It's me, I am fine sand. Since three years ago, I have been researching and making bombs, and my accomplices have been working on them in the city.”

"Who is your partner?"

"Xie Qiu...the Xie Qiu who died in the explosion." Lan An lowered his head when he said this, "Two years ago, Xie Qiu and I worked together. I was in charge of making the bomb, and he was in charge of dropping it."

Lu Junchi frowned even deeper: "Your main crime."

"We drop bombs in the city every ten days." Lan An paused and said, "After his death, I didn't do it again. Until recently, Yu Keke was harassed. Dong Yuchen asked me for help and asked me what to do, so I gave him the bomb."

She stared at a corner on the ground and swallowed: "I didn't expect that the police would find us so soon..."

Lu Junchi thought about the sand. It seemed that she didn't know that it was the sand that exposed her. He asked, "Why did you use the sand from the painting workshop?"

Lan An lowered his head and said softly: "I'm in the sand painting workshop. Instead of looking for other sand, I might as well use the sand at hand... Besides, these sands are my favorite..."

Lu Junchi and Qiao Ze didn't speak for a while, they looked at the woman in front of them, thinking about the truth of her confession.

She said Mingqiu's name, even if she wasn't the murderer, she must have been paying attention to this case.

And a lot of what she said was accurate.

Lu Junchi stood up and handed some paper and a pen to Lan An.

He narrowed his eyes slightly and looked down at the woman in front of him: "Draw it, draw the structure of the bomb."

This is the most direct, fastest and easiest way to test the identity of fine sand.

As a bomber, if it is real fine sand, he will definitely be able to restore the structure of the bomb he made.

Lan An glanced at him, took the paper and pen, and drew with trembling fingers.Perhaps because of being too nervous, the lines she drew were all distorted. Even so, it can still be seen that she has a good foundation in art.

The prototype of the bomb was quickly drawn, and then she started to paint the details of the interior, and also made signs on the outside.

Lu Junchi stood opposite her, looking down at the woman and the picture in front of her.

Qiao Ze sat on his seat and stretched his neck. He also wanted to see what Lan An drew, but his position was a bit far away, and it felt unruly to get closer, so he could only sit on the seat patiently.

Time passed by.

Su Hui rested his chin on his hands and sat in the observation room, watching all this silently. His vision was hazy, and he could vaguely see Lu Junchi standing beside Lan An, but he could hear the voices inside.

The interrogation room was extremely quiet, only the sound of the tip of the pen touching the paper was transmitted to his headset through the microphone.

It was as if something had gently touched his non-deaf eardrum.

Su Hui knew that Lan An must not be scribbling. If she made a mistake, it wouldn't take so long. Lu Junchi must have stopped her long ago.

Lu Junchi is standing by the side now, quietly watching her draw, there is only one case, Lan An's drawing is correct.

His inference was not wrong.

The images drawn by Lan An took shape, and then she started to make signs.

She pursed her lips, controlled the pen in her hand, and wrote beautiful characters beside her.

Lu Junchi had just listened to Zhu Baiyi's lecture, and he knew the general structure of the bomb.What Lan An drew in front of him was the bomb that appeared in the accident.

In the end she drew two lines and marked it next to it—"sand".

That is the key position of the whole bomb, which is the isolation sand layer for the reagents. Once the time is up, the sand layer will leak down, the two materials will fuse, and the reaction will proceed, which will generate huge energy and then explode.

Lan An's drawing gradually took shape, and there was no need to ask experts to confirm it anymore. Lu Junchi could see that it was exactly the same as the bomb structure of the Xisha case.

The woman in front of me really has something to do with everything.

Lu Junchi put away his pen and asked Lan An, "Where did you learn how to make it?"

Lan An said: "It's my father... He used to be a blaster in the mining area, so he knew Zhiqiu. He has always been interested in making these things. When I was a child, he taught me how to make bombs."

Lu Junchi looked at the woman in front of him: "Why did you kill those innocent people?"

From two years ago to now, so many people have died, among them may be scum like Duan Siyuan, but more innocent people, and even many police officers.

Thinking of those people, Lu Junchi felt his eyes swell.

Lan An lowered his head and said, "Every time the location is randomly selected by Xie Qiu, I just provide him with bombs."

"You should know that what you provided him is a dangerous thing, which will hurt people's lives, right? Without your help, Xie Qiu would not be able to cause such heavy casualties. These things are all related to you." Lu Junchi emphasized his tone ,"Why?"

These three words, he is not only finding out the truth as a policeman and questioning the prisoners, he is also asking for those dead souls.

Lan An's voice trembled: "There is no special reason. It's because... I hate them. They are also human. Why do they live so easily while we live so hard. What I see every day is the helplessness of life ... Xie Qiu is sick, and the hospital can't cure him... He naturally wants some people to accompany him to die."

"There is no one at all, life is easy..." Lu Junchi sat back in his seat as he spoke, trying to calm himself down.

He said: "Okay, you said you are fine sand, then let's start the verification now, I hope you can recount your crimes clearly. When did you start, what did you do the first time, and what did you do the second time?" The first time, the third time... every time you see those news, how do you feel."

Lan An raised his head when he heard this, with tears in his eyes: "I confessed everything, isn't that enough? I confessed all the crimes. Isn't it enough? I confessed, I confessed, I did all those things , your case is solved, just give me the form and I will sign it. Then it will be the judgment of the law, isn't it?"

As soon as Qiao Ze stopped writing, he didn't know why, Lan An's obedient cooperation from the beginning suddenly changed his state.

She obviously didn't want to recall those details.

Su Hui sat in the observation room and looked at the situation inside. He suddenly stood up and pushed open the door of the interrogation room.

Lu Junchi was a little surprised at his entry.

Most of the time, Su Hui would not personally interrogate the prisoners. One was because of his status as a consultant, and the other was that he was better at sitting in the observation room, listening to their stories, and profiling the prisoners' psychology.Also, Su Hui couldn't see or hear clearly, the earphones in the observation room could help him capture more information.

But now, he appeared in the interrogation room, facing Lan An.

Su Hui didn't sit down, but stood by the wall, and said, "You don't match my profile."

Lan An was stunned for a moment, obviously not understanding: "What doesn't match..."

"Profiling." Su replied, "Every criminal has his own psychological trajectory, just like the sand bottle paintings you drew. The paintings in each person's heart are unique."

Lan An lowered his head, his face becoming more and more haggard.

Su Hui asked her: "How many bombs did you give Dong Yuchen?"

Lan An lowered her head, as if she was thinking, and then said tremblingly, "Two."

"What color sand did you use to make the bomb for the first time." Su Hui asked again.

"The first time..." Lan An hesitated, her eyes flustered, and then her lips moved, "It's blue sand."

Lu Junchi's brows relaxed. Just now he felt that something was wrong, but he couldn't find a breakthrough.But Su Hui quickly asked two questions.

The answer she said was wrong, the first Sha was ordinary Sha, and what they caught was not the real murderer at all.

The room was suddenly quiet, Lan An's face changed, sweat dripped from her forehead, and she realized that she had given the wrong answer.She hurriedly wanted to make amends: "I... I may have remembered wrong..."

The three police officers looked at her. It was impossible to remember it wrongly. The first time a bomb was made and dropped was like killing someone for the first time, it was enough to make a bomber never forget it for the rest of his life.

When asked here, Su Hui stopped going around in circles. He looked directly into Lan An's eyes and said, "Lan An, you run a special painting workshop, and the work you do is only done by a person who has compassion for others." Yes. Since just now, you have been avoiding the topic of those casualties, your indifference is feigned, you can feel the pain of others, and you are not a person who would hurt innocent lives."

This is the heart of the matter.

Lan An wasn't indifferent or cruel enough. He didn't know how she knew the internal structure of the bomb, but she couldn't create the motive of killing out of thin air.

Now, Lan An was even more nervous than before. She bit her lip and scratched the handrail of the interrogation room with her nails.

Su Hui said: "I asked you two questions. For the first question, you guessed the answer. You know that there was an explosion, and then I will ask you a few more. Naturally, the answer cannot be one. You I thought three was too much, so I tried to answer two. I hope you answered the first question correctly, because this will give you a kind of inducement, you will think my question is simple, and you can answer my question by deduction ...you know we tracked you down the sand, so when I asked for the color of the sand, you answered that person's favorite color."

Blue, for them, is not only a surname, but also has other meanings.

Lan An's lips trembled when he was taken in by what he said.

Su Hui continued: "He also used blue, but not as the beginning, but as the end."

"He used ordinary sand at first. As long as he keeps using ordinary sand, it will be difficult for us to catch him. But later, he switched to colored sand from your workshop."

"Maybe this person has prepared a way out for himself a long time ago. Once he is discovered, he can throw the blame on you... Or he has already made sure that you are willing to take the blame for him."

"There was a reason why he didn't show up in those two years, and there is also a reason why he did this again now."

"Perhaps, he used the most unique peacock blue this time, so that we can easily find Shafang, find out Dong Yuchen and Yu Keke, and the purpose is to catch you..." Su Hui's voice was low and hoarse, and he didn't use anything Harsh words, but every word he said was like a sword, piercing into Lan An's heart.

He's telling the truth...

Fear appeared in Lan An's eyes, and her teeth were touching unconsciously, rattling.

At the beginning of this interrogation, she was already mentally prepared to face her fate.

But now, she wavered.

After talking about this, Su Hui looked down at her, his voice was slightly serious: "Lan An, don't lie, tell me, who is that person, the person you want to protect?!"

Su Hui could feel that the person who made the bomb was ruthless, indifferent, and regarded life as nothing. It was absolutely impossible for him to be the shivering woman in front of him.

He had been listening in the observation room just now, and at the end of the hearing, he finally knew why something was wrong, it went well, everything went so smoothly...

This smoothness represented that they had fallen into the trap of the murderer.

He must hurry up and get the truth from this woman.

Because maybe at this moment, a new disaster is brewing in this city.

On the first floor of a building in Jiayu Community, two streets adjacent to Sand Painting Workshop, a figure stood by the window, raised a corner of the curtain, and looked at the street below.

It was a very small window, less than half a square meter wide, and it was separated by iron bars. Even if the window was opened, there would only be a small gap.

That is the only place in the room that can be illuminated by light.

He suddenly heard the sound of opening the door, and the smile on his face gradually grew bigger...