twin detective

"No matter what the purpose is, using this method can prove that it is a subjective evil." Ning Zhi paused for a while before reaching a conclusion.Pointing downstairs again, "The landlord is here today, let's listen to what she has to say."

As soon as Ning Yuan arrived at the door of the interrogation room, he pushed the door open a crack, and before he could go in, he heard a voice coming out from inside.

"Comrade policeman, I don't know why there is so much activated carbon in the basement."

The voice was high and shrill, with obvious excitement, it was the voice of the landlady's aunt.

Ning Yuan pushed the door open and went in, meeting her eyes just in time.

The landlord was frightened to death yesterday, and when he saw two more people coming in, he mistook it for an escalation of the situation, so naturally he became more panicked, and all the expressions were piled on his face.

"Don't worry, didn't you just tell me that Liu Xu suspected that there was formaldehyde in the room, and you had a bad fight over it."

Lin Zang motioned for the two to sit down, and calmed each other's emotions in time.

The landlord waited for a few seconds, and found that the people who came in were Ning Zhi and Ning Yuan, and he was a little relieved.After all, no matter what their identities are, if they met once, they will always be familiar with each other and give birth to some trust.

She glanced around and sat down again, "Yes, there is such a thing. How can there be formaldehyde in my good house? It's not newly renovated." Said, "It's all right now, it's not the formaldehyde problem, it's the death."

formaldehyde?

As Ning Yuan listened, he subconsciously remembered the activated carbon found in the basement, and wanted to correct the landlord's aunt's erroneous opinion. The volatilization period of formaldehyde is as long as 3-15 years, and it is not only new houses that have such troubles.

He was still in a daze, but Ning Zhi said directly, "When did this happen?"

"Probably in March of this year, when they just said they would rent it." The landlord half-raised his head in thought, and made a decision after a few seconds, "Yes, it was at this time, I will not remember wrongly. They just There were a lot of things when I was renting, and I never thought that it would kill people now."

March...it happened to be the time when school just started.

Could it be that at that time, Liu Xu was already planning to murder someone?Saying that there is formaldehyde in the house is just an excuse to be able to buy activated carbon again?

For a while, this was a question that existed in the hearts of several people present.

Ning Yuan also followed this line of thought, and the more he thought about it, the more he felt that there was such a possibility.

After all, the activated carbon currently on the market does not have much effect on the adsorption of formaldehyde. Therefore, the new house has just been renovated and mainly depends on ventilation.

For example, relying on opening doors and windows or installing fresh air systems.If there are elderly people, children, or pregnant women at home, you should simply hire a company that specializes in formaldehyde treatment.

Liu Xu is a college student, so it's impossible for him to be so ignorant of common sense.

...However, I can't say with 100% certainty.

His specific purpose is still open to debate.

Ning Yuan was obsessed with this possibility and was still in a daze, but Ning Zhi winked and signaled him to go out.

"When Lin Zang asked about formaldehyde, he must have asked someone to investigate it." As soon as he went out, Ning Zhi reminded him.Sure enough, when the two waited in the lobby for less than 5 minutes, the police came over and handed over a few new forms.

Ning Zhi didn't mean to shy away from it, Ning Yuan also went to look at it, but found that it was Liu Xu's recent shopping record.

Activated Charcoal Pack Household Indoor (85g)

Order Remarks: Post

付款时间：2018-3-1018:48:45

Activated carbon bag large bag to remove formaldehyde (2kg)

Order Remarks: SF Express

付款时间：2018-04-1412:31:32

"You actually bought four catties for the second time?"

Ning Yuan took a brief glance, and saw an astonishing number, and almost couldn't help crying out.

"Well, it cost 59 yuan. He bought such a large amount at one time, it can cover an entire room."

The policeman followed suit and scratched his head again, "For ordinary people, they buy a small bag and put it in the wardrobe or shoe cabinet, just like his first order."

This strange thing obviously indicates that there is an unusual motive, and Ning Yuan immediately thought of the pile wrapped around the corpse.

Ning Yuan thought about going to see the form recorded during the autopsy. He remembered that the pile of activated carbon was indeed about four catties, but he decided to weigh it again to avoid misremembering.

Ning Zhi pulled the man back and motioned him to read more detailed records, "Please take a closer look at the time and place and the delivery courier."

The first is the postal service. From the time point of view, it should be the time period mentioned by relaxation.As for the second stroke, Ning Yuan scanned it and subconsciously read it out, "April 4th, SF Express in the same city."

"This day is the time for catkins to die." After Ning Yuan finished muttering, his head suddenly went bright.

This was exactly what Ning Zhi reminded, and he followed suit.

The purchaser was Liu Xu, and the purchase time was a few hours before his death. Combined with the corpse in the basement, it seemed to prove that he committed suicide after committing a murder?

But just relying on the wound on his heart intuitively broke this inference.

"Since he chose to hide the body, he may have made sufficient preparations for the back road, and it is unlikely that he will have extreme behavior."

Ning Zhi obviously guessed what his younger brother was thinking, so he pointed to the entrance of the downstairs and said, "Go back first, I still have something to show you."

"What do you want to do after killing someone?" Ning Yuan didn't turn around with him, and was still stuck in it, unable to extricate himself.

"Hide the body and run."

Ning Zhi took the opportunity to answer the conversation, seeing Ning Yuan staying where he was, went to pull him again, and the two stepped up the stairs.

"Then why was he killed after a few hours instead of running away?"

"There must be something unspeakable about this."

Ning Yuan said a few words to himself, suddenly a flash of inspiration flashed in his head, and he almost couldn't help patting his leg, "I see, could it be Wen Yang who killed him?"

"No, in this case, it is inconsistent with the surveillance camera in the study room."

After he finished speaking, he immediately denied it.

On the way back to the third floor, he was in such a mess that he stopped and walked.

Ning Zhi had no choice but to hold his hand to avoid any bumps and bumps.The moment I reached the door of the office, I felt relieved and pushed the person in quickly.

Ning Yuan paused at the door, Ning Zhi felt a little funny, so he had to show his cards, "Wen Qing was the one who killed Liu Xu, and the result of the footprint comparison has come out."

"At that time, we deduced that the murderer in the catkin case had a shoe size of 37, right?" Ning Yuan just sat down, and asked questions following the train of footsteps.

"Yes." Ning Zhi poured him a glass of water and put it away, then asked, "Then when you did the autopsy, what was the length of your feet measured?"

"Size 37." Ning Yuan took a sip from the cup, and immediately resisted, "But this size is the most common, and many girls are like this."

So by size alone, you really can't tell anything.

Ning Zhi was not in a hurry to refute, but pushed the display screen to Ning Yuan's direction to signal him to look at it himself.

What appeared on the screen was a picture of two footprints.

"On the left is the footprint we collected on the spot, and on the right is the shoe found in Wenqing's rental house, and then used it to print on the same floor."

Ning Yuan looked at it for a while, but couldn't see why, so he had to silently move away from the screen, "Brother, I... I don't understand."

Ning Zhi seldom saw his younger brother with such a confused expression, so he couldn't help but smile mischievously, and tapped the screen in the current posture, "This result shows that the footprints are left by these shoes, from the step length , spacing can be judged. The most important thing is that blood was found under the sole of the shoe, which can be confirmed to be catkins."

Wen Qing was straightforward when killing people, but after Liu Xu fell to the ground, she panicked for a short time because of her lack of experience.

It was during this period of time that the blood from the wound formed a pool, and Wen Qing's shoes were naturally stuck to it.

Then she wiped it again, so it left a swab of blood.After that, she threw the shoes in the shoe cabinet, changed into a new pair of shoes, and went out.

Ning Yuan made up the picture of the scene at that time, and thought of the dark window, and felt a chill down his back.

"But Wen Qing's death was obviously earlier, so this inference may not be reasonable."

Ning Yuan came back to his senses, only to realize that he had already drunk most of the water, and his brother was looking at him.

But he instinctively felt that it was wrong, and immediately made a negative inference, "No, the temperature in the basement is not low, and if the murderer did something else after the murder, it would indeed affect the degree of corruption."

"Also, these are a pair of dancing shoes, I guess they are for Wen Qing to use during the live broadcast."

Ning Zhi deduced that these were Wen Qing's shoes, he filled the cup with water, and took out the A4 paper to make his new mind map.

And Ning Yuan couldn't tell if someone was wearing her shoes to deliberately frame her, which is obviously a bullshit statement.

"Then we can only wait for the family members to come. After the autopsy, we will be able to confirm the exact time of death."

Looking at the glass of water, Ning Yuan couldn't help frowning, and was about to slip away, but Ning Zhi raised his head at the right time, and he was scared.

When he returned to the office, he still had the rustling taste in his mouth, so he had to eat a big white rabbit.

There are more and more clues, but in fact there are paradoxes everywhere.After Ning Yuan finished eating the candy, he also tried to make a mind map, but after a few minutes, he naturally walked into a dead end.

Fang Yuan has been writing work notes in a regular manner, and she has to bite the bullet and ask Ning Yuan when she encounters something she doesn't understand.

She thought she was going to put on a cold face, but she didn't know that Ning Yuan's attitude was still as easy-going as usual.

"what happened?"

Seeing her stunned for a moment, Ning Yuan asked again, "Did I speak too fast just now? Do you want to do it all over again?"

"No, I understand."

Fang Yuan dared not say that she was deserting, so she quickly grabbed her notebook and started rubbing against her seat.

As soon as she got back on her knees, the assistant brother ran between her and Ning Yuan, "That... you guys have a look."

Ning Yuan poked his head and saw that his head, which had already become a beehive, was almost about to explode.

The purpose of entry was the interface of Weibo, and the picture on the screen was the photo of Wen Qing being carried out and preparing to get into the car.

The angle of the photo was chosen very well, and it was enough to prove that it was a close-up shot.

Under this Weibo, there have been many related discussions.