Controlled experiment

Du Yusheng was woken up by the alarm clock.

Opening his eyes dully, he realized that he had just slept on the sofa with his clothes closed all night.

The sofa is no better than a bed, Du Yusheng's mind is buzzing all the time, a sequelae of not sleeping well.

There are two things to do today, one is to investigate Chen Xin's home, and the other is to monitor around the scene of Qian Lao's crime.The surveillance at Huandao Hospital no longer expects to see anything. The murderer is smart enough to walk through the vent, and he can do it without leaving a trace.

After changing his clothes and washing up briefly, Du Yusheng was ready to go out.

Before leaving, he stayed at the door for a while, looking thoughtfully at the door of Li Yao's room.

Hearing that he seemed to be at work today and not at home, Du Yusheng suddenly had an idea of ​​wanting to break free again, and he looked down at the watch on his wrist.This watch and the one given to Li Yao are a pair, Du Yusheng turned the dial, he was waiting for Li Yao to bring it out one day, and found his little thoughts.

His mood was affected by the watch, and his thoughts of breaking into the empty door also faded. Du Yusheng went to the underground parking lot without any further delay.

When they arrived at Chen Xin's house, Xiaobai had been waiting downstairs for a long time.

He was driving the bureau's car, and he was sitting in it drinking soy milk, his eyes still looking at the windows upstairs from time to time, he was afraid that people would leave.

Du Yusheng parked the car and went over to pat his car window.

"Didn't eat?" Du Yusheng asked.

Xiaobai opened the car door and walked out, leaning against the car door and nodding, while still drinking the soy milk in his hand.

"Just drink soy milk?" Du Yusheng joked, "Are you full?"

"No, I just bought it." Xiaobai took out the bought steamed stuffed bun from the car window, shook it in front of Du Yusheng, and said with a smile, "This is called a soup before a meal. It won't hurt your stomach and intestines. Drink some soy milk first. Then come the staple food, which is easy to digest..."

Du Yusheng didn't listen to the second half of the sentence, and grabbed the bun in Xiaobai's hand with one hand and stuffed it into his mouth.

"Exactly, I didn't eat it either."

Xiaobai watched as both of his steamed buns fell into Du Yusheng's mouth, his little face turned red and he couldn't say a word.

Du Yusheng snorted through his nostrils, and said, "What you said, a sip of soup before meals won't hurt your stomach and intestines. I have a solid stomach, so don't be afraid, I'll take it for you."

Xiaobai swallowed Cao Nima vigorously.

Throwing the plastic bag in his hand into the trash can, Du Yusheng grabbed the soy milk in Xiaobai's hand and took a sip, then glanced upstairs.

Said: "The job is done?"

Well, there was no soy milk left.

What's inside the meat buns, never come back.

Xiaobai nodded in resignation and said, "I told his wife that if he doesn't cooperate, he will be detained."

Du Yusheng said kindly, wiped his mouth and got on the elevator.

==

For a wealthy businessman, Chen Xin's home can indeed be described as simple.

Three bedrooms and one living room. Although the living room is on the sunny side, it is not big, and it is connected with the kitchen.Compared with other wealthy businessmen, Chen Xin's study room is also much smaller.Most of the indoor furniture are not new products, nor are they made of high-end luxury materials. They are all ordinary goods in the furniture market. The style is also old, more like things left behind after moving.

At first glance, the family looks more like an ordinary middle-class family.

The only thing of value are two porcelains in a transparent glass case.

Du Yusheng doesn't know how to do archaeology, let alone determine the age, but just looking at them in a glass cabinet, they should be of great value.

Several people were called to search each room.

Du Yusheng pulled out a chair and sat down next to Mrs. Chen in the living room.

Mrs. Chen was also very ordinary dressed, sitting on the sofa a little stiffly, looking at the staff coming and going from time to time.

Du Yusheng coughed lightly twice.

"Should you have just moved here?" Considering Mrs. Chen's concerns, Du Yusheng explained: "We are just asking a few words, you can just tell the truth, and what is the dispute between you and Huandao Hospital?" , How to compensate has nothing to do with how you tell me, just relax and say what you want to say."

Hearing this, Mrs. Chen's tense nerves relaxed a little.

She poured herself a glass of water.

"We used to live in the villa on the other side of the island. Later, Lao Chen lost money in business for a few years, so he sold the villa and exchanged the remaining money for this house."

Villas around the island...

Du Yusheng thought of someone.

"Do you know Daheng Luo?"

Mrs. Chen was stunned, as if she didn't expect Du Yusheng to ask him.

"... He, isn't he dead?" Mrs. Chen continued: "I heard that he was killed by his son?"

Du Yusheng neither denied nor admitted, and said, "Did you know him when he was alive?"

"I know." Mrs. Chen thought for a while, smiled and said: "The two of them have known each other for a long time, and they have known each other for a long time. At that time, Lao Chen's business was not bad. Later... you also understand that in this circle No money, no status, we moved again and rarely communicated."

There were two cups of tea on the table. Du Yusheng picked them up and smelled them, frowned, didn't drink them, and put the tea back where it was.

In fact, he has no research on tea. In Du Yusheng's eyes, there are only two kinds of tea, good and bad.The tea that is better than the tea given by the old man is good tea, and the tea that is not as good as the old man's tea is bad.However, what Qin Yan said later was quite right, no one can compare to the few acres of tea land in your family.

Putting his hand on the edge of the teacup, Du Yusheng said, "Have the two of them been in contact recently? Or, have they done anything together before?"

"What do you mean by doing something together?" Mrs. Chen was a little excited, "Old Chen is doing his own business. How do I know if they contact me? I don't participate in business matters at all. Officer Du, Luo The tycoon is dead, does he have anything to do with this?"

"Then let me ask you something you know." Du Yusheng licked his lips and said, "Chen Xin owes a lot of money, whether it's the factory or the workers, why didn't anyone go to the hospital to make trouble?"

Mrs. Chen sighed, shook her head and said: "I made a fuss, I made a fuss at home, but they see me as a woman... I didn't know about Chen Xin's sudden hospitalization at first, but then I thought he wanted to I don’t care about avoiding the limelight, and I don’t know if someone asks me, so I’ll hide it for him, otherwise..." Mrs. Chen’s eyes were slightly red when she said this, this woman who is so strong in the hospital can’t stand it anymore Memories emerged, pursing his lips and shaking his head constantly.

"...That's it, I didn't protect him." Mrs. Chen choked up and said the last part of the sentence.

Du Yusheng couldn't stand it anymore, so he took a tissue and handed it to her.

"But you still told Gu Qingyu the address, right?"

"I can't help it." Mrs. Chen said: "He said he wanted to pay back the money. I was so happy that I told him. I didn't tell anyone except him."

No one said except him that Gu Qingyu was not the murderer, so how did the murderer know that Chen Xin was not at home and was hospitalized.

Du Yusheng glanced at Mrs. Chen, and then asked, "Before and after Chen Xin died, did you meet anyone at home?"

Mrs. Chen shook her head, and said, "Except for the milkman who is the courier, no one has ever come to him."

Du Yusheng rubbed his fingers, stood up and walked out of the window, opened the window, and Qian Lao's house was opposite.

It was a bit cold at the moment, and Du Yusheng's exhaled breath turned into white mist.

Xiaobai's call came at this time.

Du Yusheng took out his mobile phone and looked at Mr. Qian's room opposite. Xiao Bai was in Mr. Qian's room.

The distance is far, and only Xiaobai's figure can be seen from a distance, but the movements of his hands cannot be seen clearly.

"Here?" Du Yusheng asked.

Xiaobai said with a smile on the phone, "Brother Yu, I'm holding a telescope, let alone you, I can even see the two antique vases behind you."

"So clear?"

Du Yusheng didn't expect to be able to see so clearly with a telescope. It is probably because the windows of the two families are facing each other, which is a straight line without detours, so they can see more clearly.

"Then can you see clearly what I'm talking about?" Du Yusheng opened and closed his mouth and said a few words.

Originally, Xiaobai stared at the binoculars quite seriously, but after carefully distinguishing them, he cursed "Damn" and took down the binoculars.

Du Yusheng said four words 'soy milk is good'

If it wasn't for Li Yao's order, and it wasn't because Du Yusheng was his boss, Xiaobai really wanted to fly over and beat him until he fainted because of his pissing nature.

After calming down, Xiaobai picked up the phone again, and said: "You mean, the murderer killed Qian Lao to occupy this room, and then he used a telescope to see the conversation between Mrs. Chen and Gu Qingyu before he knew it. What about Chen Xin in the hospital? This is impossible." Xiaobai denied, "I can distinguish simple words, but when it comes to ward numbers, I can't distinguish them clearly."

"You're half right." Du Yusheng scratched his nose and said with a smile, "The purpose of the murderer's use of the binoculars is probably to determine whether Chen Xin is really not at home."

"Because of this, kill Qian Lao and take another life?"

"You want to understand the psychology of murderers?"

Xiaobai cursed.

Du Yusheng continued: "As for how the murderer knew about Chen Xin's ward, once it was confirmed that Chen Xin was not at home, he might have followed Mrs. Chen, but Mrs. Chen didn't seem to know. I also asked Mrs. Chen, and Chen Xin died. The day before, she did go to the hospital to visit him secretly. "

"...But Mr. Qian and Chen Xin died one day apart."

Du Yusheng nodded towards the window, and said, "It is very likely that the murderer slept at his house overnight on the premise that Mr. Qian was already dead."

Xiaobai felt his throat tighten and he felt like retching.

Du Yusheng hung up the phone and looked around at the colleagues working at Chen Xin's house. From their faces, he could tell that the valuable things in Chen Xin's house were not as valuable as Mrs. Chen's confession.Du Yusheng walked around in the study, he remembered the pair of shoes with red clay debris in Chen Xin's ward, he always felt that there should be something in common between Luo Daheng and Chen Xin, but he didn't find it.

There was nothing in Qian Lao's stomach, and it could be seen that he was not within the scope of the murderer's original killing.

Excluding Mr. Qian, Du Yusheng still couldn't figure it out.

There are two pots of flowers in Chen Xin's study. The owner of the flowers is not careful. The simple and easy-to-raise plants are all mottled by insect bites.

Du Yusheng opened the drawer in Chen Xin's study. Inside the drawer was a stack of project lists.Du Yusheng took out the project list and flipped through it. There was a photo in it.The color is a little old, and it looks a bit old-fashioned. There are seven people on the photo, and Chen Xin is on the far side. Du Yusheng doesn't know all about the seven people on it. You can only see that Luo Daheng is also on it, next to each other. Chen Xin.The seven people above looked very young, a little green, and their clothes were relatively plain. Du Yusheng reckoned that they should be photos before they became rich businessmen, before starting a business.

Du Yusheng kept an eye out, and took a picture of the photo before handing it over to the physical evidence department.

Seven people, now two are dead.

It's not a damn ghost.

When Xiaobai came back, Du Yusheng was smoking at the door.

Seeing Xiaobai approaching, Du Yusheng subconsciously extinguished the cigarette.

Xiaobai shook the things in his hand, and said, "The surveillance video has been tuned up. Let's go and have a look."

Du Yusheng nodded.

With a few people stuffed in, the security room in the community immediately seemed a bit crowded.

Du Yusheng winked and signaled Xiaobai to turn on the surveillance video.

The time of Mr. Qian's death was between nine o'clock and eleven o'clock at night, and the surveillance video was taken during this time period.

Because it is a school district house, most of the people and vehicles coming and going at the gate of the community are mainly students and parents, and most of the later ones are couples or young people who go out to play, and people who work overtime.Looking at it for a few time periods, Du Yusheng didn't find anyone suspicious.

Du Yusheng glanced at Xiaobai, and said, "Tune the previous one to see."

From the afternoon until between nine o'clock and eleven o'clock at night, I looked around and didn't find any suspicious people.

According to what the security guard said, there were no new faces.

Du Yusheng scratched his chin, feeling extremely irritable.

He adjusted the time of the surveillance video forward by two hours, to five o'clock in the afternoon.

A milk delivery car appeared on the surveillance video, and a milk delivery boy rode a bicycle into the community and disappeared in the surveillance video.

Du Yusheng pressed the pause button, looked at the security guard, and said, "Isn't the milk delivered in the morning?"

The security guard smiled, "Some office workers are afraid that it won't be fresh, and some ask for it to be delivered in the afternoon, so that what they drink when they go home at night will be fresh."

Du Yusheng subconsciously glanced at Xiaobai.

The latter didn't understand what was going on, and watched Du Yusheng hold the progress bar back for several hours with a look of astonishment.

"Didn't you notice?" Du Yusheng tapped the screen and said, "After the milkman went in, he never came out."

Listening to Du Yusheng's words, Xiaobai's mind flashed the image of seeing the milk delivery boy that day.

"Adjust the monitoring for the next day." Du Yusheng said.

The second day of the surveillance video was the day Chen Xin died.

The first thing that appeared on the screen in the morning was Mrs. Chen's figure. Five minutes later, the milk delivery boy rode a milk delivery cart with a logo on it and passed by the surveillance camera slowly, and left the community.

Xiaobai felt a faint chill behind him, and said, "He stayed in the community for at least ten hours...what is he doing?"

"Fortunately, it's winter, and the temperature outside is colder than a refrigerator." Du Yusheng sneered, "Otherwise, his truckload of fresh milk might have gone rancid."

Du Yusheng lit a cigarette and walked out of the security room.

From the current point of view, the milk delivery boy is the most suspicious one. After delivering a milk for ten hours, even the city courier should arrive.

"Contact the milk delivery company, I don't need to say more, you know what to do." Du Yusheng said.

Xiaobai nodded, and took out his mobile phone as if to make a call.

Du Yusheng stopped Xiaobai, hesitated for a while, turned on his mobile phone, and showed Xiaobai the photo he secretly took at Chen Xin's house.

"I found this in Chen Xin's item list." Du Yusheng said: "Seven people, now two are dead."

Xiaobai was stunned looking at the picture on the phone, and said, "It's not that two died, but three."

Du Yusheng froze.

"This person." Xiaobai pointed to the person in the middle and said, "This person's surname is Jing, and he is an arms dealer. He also died a long time ago."

The author says:

Xiaonian is falling soon!Unknowingly wrote so many pages, the rhythm is very slow, right? QAQ [Ask everyone, is the typesetting still normal?Is everything normal including the previous chapters?Fish food for crabs and crabs hee hee