Detective: Open your eyes, I am handcuffed in the interrogation room.

Chapter 598 Zhou Junjie, let’s chat?
After changing a pair of gloves, Chen Yi went downstairs to the hall, where six people sat around the table, including Qin Fei.

When they saw Chen Yi appear, everyone looked over. Boss Wu Changchun and Zhou Junjie thought they had found out something.

When passing by, Chen Yi didn't say much, but just asked where Wu Rui was at the moment, and found out that the other party was in a daze in his room.

This is Wu Rui's habit. At noon, he would basically stay in his room in a daze, immersed in his own world.

After going out of the door and around to the backyard, Chen Yi looked up at the window of the room where Wang Yingjie was, and then looked at the layout of the items in the backyard, and calculated the landing point based on the angle and strength.

Put yourself in his shoes, what would the murderer do with the tape he used to seal Wang Yingjie’s mouth?

It is definitely impossible to keep it around, it is too dangerous. Once discovered, it will be the prime suspect and must be destroyed or thrown away.

It is more difficult to destroy it, but it is easier to throw it away, as long as you don't keep it around.

Even if it was left at the scene, the police could not determine who the owner of the tape was, but no remaining tape was found at the crime scene.

So, could it have been thrown into the backyard through the window after the crime was committed?

There is such a possibility.

That's why he came to the backyard, to try and find it.

If they can't find it, they will search the room of the owner Wu Changchun and his family of three. If they still can't find it, they will wait for enough police force to arrive and conduct a comprehensive search of the entire inn.

After judging for a while, Chen Yi withdrew his gaze.

When throwing away things that you don't want the police to find, you will subconsciously throw them to places where there are a lot of miscellaneous items, so you can ignore the areas near warehouses and large open spaces, and there are no suspicious items at a glance.

Chen Yi started from the beginning and worked his way forward bit by bit, focusing on nooks and crannies that could accommodate small items.

The result was much smoother than expected. After searching for a while, Chen Yi paused, bent down, reached through the messy farm tools, and picked up a rubber ring through the gap on the ground.

The rubber ring is transparent and its width is the same as the tape covering Wang Yingjie's face.

That's right.

Chen Yi leaned in closer to carefully observe the broken part of the tape. He seemed to have discovered something and was stunned for a moment. Then he raised the corner of his mouth and put the rubber ring into the evidence bag.

The case should have been solved. The murderer's plan was not thorough enough and he was too nervous, which led to a huge mistake.

The broken end of the rubber ring in the evidence bag was judged to have been bitten open by teeth.

This is a living habit of many people. It is very convenient to tear off the tape with teeth.

However, in this case, there is a high probability that DNA will be left on the broken edge of the tape.

All organs in the human body continue to metabolize without stopping. The shed cells are the products of metabolism, which contain DNA and can be extracted through body fluids such as saliva.

irrefutable evidence.

If DNA can be extracted from the broken edge of the tape, the identity of the murderer can be identified through comparison.

But right now…it’s hard to say who the murderer is.

More clues are needed to find the murderer before the tape breaks.

By using clues to infer the most likely suspect, and then using the tape as evidence to interrogate him, it is highly likely that the other party's psychological defenses can be broken.

The direction of the investigation in this case was extremely clear, and Chen Yi had foreseen everything from the investigation process to the results.

Returning to the lobby of the inn, Chen Yi did not stop as he passed by several people, but he walked slowly. He deliberately held the evidence bag with his left hand, exposing the contents of the evidence bag to everyone's sight.

If you just look, you can see what is in the evidence bag.

Sure enough, out of curiosity, the five people looked over and stared at what was in Chen Yi's hand. Judging from their expressions, there was nothing unusual.

However, Zhou Junjie shifted his gaze very quickly, his eyes only touched the evidence bag for less than a second before he immediately retracted his gaze. In contrast, the other four people were still looking at Chen Yi until he walked away, as if they were wondering where the other party got the tape from and what the tape had to do with Wang Yingjie's death.

The only person who witnessed the scene of Wang Yingjie's death was Zhou Junjie, and they didn't know that Wang Yingjie's face was covered with transparent tape.

Walking up the stairs, Chen Yi looked back at Zhou Junjie before disappearing.

This person is becoming more and more suspicious. If nothing unexpected happens, it must be him.

In the early morning, Wang Yingjie was yelling in the room. Zhou Junjie entered the room to comfort him. After Wang Yingjie fell asleep and everyone left, he returned, slowly put tape on Wang Yingjie's face, and then pierced his heart with a knife.

Wang Yingjie struggled and fell off the bed and died. Zhou Junjie went to the window and threw away the remaining tape with force. The tape fell into the pile of debris in the backyard. Finally, he returned to his room and flushed the disposable gloves into the toilet.

A few hours later, at noon, he became the one who discovered the body.

Why not just use the toilet in Wang Yingjie's room?

In order to prevent fingerprints from being left everywhere, the gloves cannot be taken off.

There is a problem here.

Peng Xiao can barely be considered a witness to prove his alibi.

Zhou Junjie and Peng Xiao were sleeping in the same bed, how dare he leave to kill someone? Wasn't he worried that Peng Xiao would wake up?
With such a big thing, are we going to gamble on how soundly Peng Xiao is sleeping?
Or is it that Peng Xiaoben is an insider and participant?
With doubts, Chen Yi returned to the room where Zhou Junjie and Peng Xiao were. At this time, He Shixin and Teng Dabin were still searching and no new discoveries had been made.

Chen Yi came to the left side of the bed near the window. This was where the bedside table was. There was a glass of used water on the bedside table. He picked up the glass and tilted it over to observe. There were about ten milliliters left.

I bent down and sniffed the pillow next to me. There was a lingering feminine scent on it. This was where Peng Xiao slept.

So this glass of water is for Peng Xiao to drink.

Holding the glass of water, Chen Yi left the room.

If Zhou Junjie was the murderer of Wang Yingjie, then there are three possibilities as to why he dared to leave the room and kill in front of his girlfriend Peng Xiao.

First, bet that Peng Xiao will not wake up.

Second, collusion.

Third, make sure Peng Xiao will not wake up.

Chen Yi would not let go of any situation. If there were suspicious substances in the water cup used by Peng Xiao, then Zhou Junjie would drug her.

It is still easy to buy sedatives.

After drinking the water containing sedatives, it would be difficult for Peng Xiao to wake up, let alone sneak out of the room, even if there was a lot of noise.

This is the safest method.

Therefore, if the suspicion is correct, Zhou Junjie is really the murderer in this case. Either the two of them conspired, or Peng Xiao was drugged.

When they arrived at the crime scene, Wang Yingjie's body was lying there alone. Su Ying was standing at the table fiddling with bottles and jars of different colors. If she wore a white coat, she would look like a scientist doing experiments.

Obviously, she brought a lot of reagents as backup, had a positive and proactive attitude towards work, and was responsible for herself and others.

Seeing Su Ying's serious look, Chen Yi did not disturb her. He gently put down the cup in his hand and looked at Cheng Hanjun.

Cheng Hanjun came over and whispered, "We didn't find any footprints of the suspected murderer. There are a lot of fingerprints on the door handle. Metal door handles are very easy to leave fingerprints on, and they can remain for a long time. They should be from the innkeeper and other guests."

Chen Yi: "Just get to the point and skip the nonsense."

Cheng Hanjun was embarrassed for a moment and said, "The latest fingerprint has been successfully extracted. I remember that the last two people who touched the door handle were Zhou Junjie, right? If he is the murderer, it will be difficult to deal with."

Chen Yi: "There are no footprints that look like the murderer's... Are you wearing shoe covers?"

Cheng Hanjun nodded: "It should be. The murderer was well prepared and had planned to kill Wang Yingjie. Since it was premeditated, it is unlikely that the boss and his wife did it." Chen Yi took out the evidence bag: "The remaining tape was found in the backyard. The murderer bit it open with his teeth."

Su Ying reacted quickly and looked up immediately: "Use teeth? Wouldn't that solve the case?"

Chen Yi looked at her: "Finish your work."

Su Ying nodded and continued to test.

Cheng Hanjun soon realized that they had the murderer's DNA, and it was only a matter of time before he found out his identity. However, Xigui County was remote and had average economic development, so they probably didn't have the technology to extract and test DNA, and it needed to be sent to the city.

In this case, just hand it over to the Xigui County Criminal Investigation Brigade for handling.

"Captain Chen, take the tape and go ask them. The murderer will probably confess." Cheng Hanjun said.

Chen Yi: "Don't worry, there are still some doubts that have not been clarified."

The room fell silent, leaving only the sound of Su Ying's operation.

About five minutes later, the three beakers in front of Su Ying began to change color. The solution turned cherry red, and the color gradually deepened as time passed.

"It's definitely that one." Su Ying said.

"Phenergan?" Chen Yi was slightly stunned. He searched his memory and quickly remembered, "Promethazine hydrochloride?"

Su Ying put down the beaker in her hand and nodded: "Yes, an antihistamine that can treat various allergies such as asthma, urticaria, etc. It can also be used in combination with other drugs for artificial hibernation."

Cheng Hanjun heard a new term: "Artificial hibernation?"

Su Ying explained: "Artificial hibernation is a medical treatment method that is very effective for severe trauma infection. It is not literal artificial hibernation."

"Oh oh..." Cheng Hanjun nodded, "Forensic Doctor Su, does this mean that Wang Yingjie took Phenergan before he died?"

Su Ying was surprised: "What else? Then what was I testing just now?"

Cheng Hanjun was used to Su Ying's personality and didn't care. He asked, "Does this have anything to do with this case?"

Su Ying: "An overdose of phenergan can have serious side effects, including drowsiness, confusion, blurred vision, dizziness, headaches, nightmares, anxiety, etc. The effect is stronger if taken with coffee.

You see, there is coffee drink. I used three beakers to test at the same time and found that phenergan was indeed present in the coffee drink bottle.

The last beaker is the white powder on the paper sent by Captain He.

It’s all Phenergan.”

As she spoke, she pointed to the drink bottle and paper on the table.

Cheng Hanjun immediately understood: "Wang Yingjie's insanity in the early morning was caused by drinking coffee mixed with Phenergan? That's why he overreacted."

Su Ying said nothing and looked at Chen Yi.

Chen Yi touched his chin and said, "Strange, was it Zhou Junjie who gave him the medicine? Phenergan is not lethal, so why did he give Wang Yingjie Phenergan?"

Su Ying: "It's hard to guess. Just go and ask and you'll know. Feinagan was found in Zhou Junjie's room, but there are two people living in Zhou Junjie's room."

The implication is that Peng Xiao is also a suspect.

Chen Yi nodded slightly: "Phenangan is a small matter, let's focus on the murder first, Su Ying, help me see if there are any conventional sedatives in here."

"Ok."

Su Ying reached out and took the cup, divided the small amount of liquid inside into four equal parts, and then skillfully titrated the reagents into it. The four reagents were different.

After finishing, she bent down slightly to observe it closely, and quickly picked up one of the cups. The liquid in it appeared orange-yellow and was slowly turning into orange-red.

In just a few minutes, the results came out.

"Yes, it's phenobarbital."

When Su Ying's voice sounded, Chen Yi took a look at the reagents used to titrate phenobarbital: sulfuric acid and sodium nitrite.

Cheng Hanjun was shocked and couldn't help but blurt out: "So awesome?"

Su Ying asked: "Are you talking about me?"

Cheng Hanjun: "Yeah, this is too fast. How do you know it's phenobarbital?"

Su Ying had no expression on her face and replied calmly: "I don't know if it's phenobarbital. Captain Chen just mentioned the conventional sedatives, and there are four types of conventional sedatives, diazepam, phenobarbital, clonazepam, and nitrazepam, so I divided it into four parts and confirmed them one by one.

Each type of sedative has a specific test method. Using the knowledge in the book, you can quickly get the results. Isn't that simple? Why do you look so surprised? "

Cheng Hanjun: “…”

He glanced at Chen Yi beside him. It was a correct decision for the other party to choose Su Ying from tens of thousands of forensic doctors. He had a sharp eye.

It sounds simple, but it is not that easy to do. After all, there are countless medicines in the world. You need to master a vast amount of knowledge and apply it skillfully to calmly solve any emergency problems.

Today it was phenobarbital, but next time it won’t be.

Chen Yi seemed not to have heard the conversation between the two. He picked up the liquid that had turned orange-red, and his speculation about the course of the crime was already very clear.

"Let's go, gather on the first floor." After looking for a while, he put down the cup, "It seems that the case can be solved without waiting for the Shuishi Town Police Station to arrive."

ten minutes later.

Lobby.

Judging from the time, the Shuishi Town Police Station should be arriving soon, and now is the time for interrogation.

The five people each got a chair and sat in a semicircle in front of the special case team, far away from each other to prevent the murderer from making a desperate move. If anyone dared to take action, Teng Dabin and others could react instantly and control him.

In order to ensure the formality of the procedure, the special case team formally presented their police officer ID for the other party to confirm.

"I'll only give you one chance." Chen Yi looked at the five people and said, "Since you refused to surrender when I advised you to, then be prepared to bear the consequences of murder.

Even if you come forward and turn yourself in now, it's too late."

When he spoke, his eyes were focused on Zhou Junjie.

All five of them were relatively calm, but having experienced a murder case and faced the police in person, they could not help feeling awkward and nervous.

At this time, Qin Fei stood up and walked over, showing the photo of the murder weapon taken at the scene to his boss Wu Changchun, and asked: "Do you know him?"

Wu Changchun observed it carefully for a moment, and his face changed: "Recognize...recognize it, it's the knife in my kitchen, no no...we didn't kill him, we didn't kill him!"

The four of them looked at Wu Changchun.

Qin Fei returned.

Chen Yi signaled Wu Changchun to calm down: "I didn't say you killed him, Zhou Junjie, let's talk? You were pretty crazy last night, you went to the kitchen and stole a knife to kill someone."

Everyone's eyes instantly focused on Zhou Junjie. Wu Changchun and the proprietress, who had breathed a sigh of relief, were then surprised. How could friends who seemed to be very close to each other be the murderer?

Peng Xiao and Fan Wen were also stunned, their faces filled with confusion and shock. Fan Wen even subconsciously moved a little further away from Zhou Junjie.

"Junjie, you..." Peng Xiao couldn't believe it.

Zhou Junjie was dumbfounded, looking bewildered: "Me? I have been staying in the room the whole time, right Peng Xiao?"

(End of this chapter)