After leaving the warehouse, Gu Chen rushed to the Technical Section of the Municipal Bureau with the objects found in the woods behind the mountain. He handed all the objects to forensic doctor Liu for testing, and performed fingerprint extraction and blood extraction on Liu Xingyun.
Afterwards, everyone took Liu Xingyun back to Furong Branch and to interrogation room No. 1.
Officer Wang and Lu Weiwei interrogated him, while Gu Chen stayed outside.
Gu Chen knew very well that it would be impossible to get this old man to confess before there was no definite evidence.
It is almost impossible for him to reveal the whereabouts of Zhang Hui.
The reason why Lu Weiwei and Officer Wang were allowed to continue interrogating him was to put pressure on Liu Xingyun.
No matter how tough Liu Xingyun is, no matter how tough-talking he is, there will be times when he gets tired.
Disguising yourself is a hard job, but for Liu Xingyun, who has played various roles, he has the characteristics of a liar.
Perhaps the disguise of a fake monk is deeply rooted in his bones, and the more he pretends, the more he thinks he is really a monk.
Gu Chen lay outside enjoying the cool breeze, while Officer Wang and Lu Weiwei continued to use their talkative characteristics and exerted various pressures on Liu Xingyun.
Liu Xingyun, who appears to be strong on the surface, is constantly being stirred up in his thoughts.
At first, Liu Xingyun was able to talk and communicate with everyone, but eventually he got tired of Officer Wang and Lu Weiwei's questions and simply stopped answering.
But this was not a problem for Lu Weiwei. Lu Weiwei gave full play to her teasing characteristics and began to educate Liu Xingyun in various ways.
At this moment, Gu Chen outside received a call from Forensic Doctor Liu, so he quickly pressed the answer button.
"Forensic Doctor Liu, how was the test done over there?"
"The results are already there. I can tell you now that the mark you provided matches Liu Xingyun's thumb."
"Great, this is what I want." Gu Chen snapped his fingers, and then quickly thanked him and said, "Thank you, Forensic Doctor Liu, your news is so timely."
"But Gu Chen, I want to explain the details clearly to you." Afraid that Gu Chen was not very clear, Forensic Doctor Liu continued to explain:
"This mark is Liu Xingyun's thumb, stained with blood on the pillow. The mark is Liu Xingyun's, but the blood is not."
"I understand." Of course Gu Chen understood that the blood could not be Liu Xingyun's at all, but Liu Xingyun's thumbprint was left on it, which was enough to explain the problem.
After getting these replies, Gu Chen asked again: "Forensic Doctor Liu, apart from these test results, did you find anything else?"
There was a brief pause on the other end of the phone for a few seconds, and then Forensic Doctor Liu said: "For the time being, I will tell you the test results you need most. As for other results, we will continue to follow up."
"Okay, then keep in touch at any time."
After Gu Chen and Forensic Doctor Liu exchanged greetings, they both hung up the phone.
With these clues, Gu Chen had a new breakthrough in his interrogation of Liu Xingyun.
Half an hour ago, Gu Chen also sent a picture of the pillow found in the woods to Zhang Hui's brother Zhang Fan.
Zhang Fan also confirmed the evidence on his mobile phone. The pillow Gu Chen found in the woods was indeed an item missing from his sister's room.
In order to confirm, Zhang Fan even sent Gu Chen a picture of another pillow of the same style that matched his sister's room.
Once the two pieces of evidence were combined, Gu Chen felt that it was not a big problem to get Liu Xingyun to confess, so he opened the door and walked into the interrogation room.
At this moment, Lu Weiwei and Officer Wang were already thirsty for interrogation.
Compare wheel tactics.
Obviously, it's Gu Chen's turn now.
Against Liu Xingyun who was obviously tired.
"Liu Xingyun." Gu Chen sat in his seat and raised his head to ask him: "Have you taken Zhang Hui to the woods?"
"I took Zhang Hui to many places." Liu Xingyun's answer was cunning.
This seems to be a one-size-fits-all response.
Gu Chen didn't talk nonsense to him, and directly told him the test information informed by forensic doctor Liu:
"Let me tell you Liu Xingyun, we have found traces on the bloody pillow. The imprint on the blood is the fingerprint of your thumb."
"Thumbprint?" After hearing what Gu Chen said, Lu Weiwei breathed a sigh of relief.
I thought, now I finally have evidence.
However, Lu Weiwei is still too young.
When Liu Xingyun heard the result, he was unfazed.
Gu Chen continued: "And the pillow found on the back mountain happens to be the pillow in Zhang Hui's room. What do you say?"
The scene suddenly became quiet...
Liu Xingyun was stunned, lowered his head and hesitated, as if thinking of a way to escape.
But after a moment, Liu Xingyun said directly: "Yes, I have been to the woods with Zhang Hui before, and we even often go to other places to wander around."
"But what does this mean? We were just walking in the woods that day. Because we often count stars together at night, we often set up tents outdoors. Maybe Zhang Hui brought that pillow? I don't really remember.
."
"Then what's going on with the blood on the pillow?" Gu Chen asked again.
"Who knows?" Liu Xingyun shrugged and said, "I took Zhang Hui to set up a tent outdoors for the last time that day. I originally wanted to spend the night with her, but I drank some wine and took a nap for a while, and then opened the door again.
As soon as I saw him, Zhang Hui disappeared."
Patting his head, Liu Xingyun added: "My head was dizzy that night. When I woke up, I didn't remember much of anything."
"What happened next?" Gu Chen asked.
"Later? Later... I walked through the woods again and was about to go back to the warehouse, but I found a pillow left behind, still stained with blood."
"But I didn't know who this pillow belonged to at the time. Why was it here? It was also stained with blood, so I picked it up out of curiosity and took a look."
"So... I don't know why this fingerprint was printed on the bloody pillow."
"Then why did you pick up the pillow and then throw it away? If you find this situation at this time, you should know that it may be human blood." Lu Weiwei said.
Liu Xingyun nodded silently: "I also know that it may be human blood, but I'm afraid. I'm afraid that I can't explain the matter to Zhang Hui. I was still a monk at the time, and I didn't dare to call the police at all, so I could only
Act like nothing happened and throw the pillow aside."
Glancing at Gu Chen in front of him, Liu Xingyun said weakly: "Comrade police, I really don't know if this is the object left by Zhang Hui."
"It just felt strange at the time, so I picked it up and took a look."
"But when I saw there was too much blood on the pillow, I threw it away immediately and left, so my fingerprints remained on the pillow."
Looking at everyone, Liu Xingyun covered his face and cried bitterly: "Why am I so unlucky?"
Officer Wang glanced at Gu Chen and shook his head.
In this case, we really can't conclude that the murderer must be Liu Xingyun.
Because what he said is indeed possible.
But the probability of this is very rare...
Although we know that Liu Xingyun has the characteristics of deception, since there are no witnesses, theoretically, Liu Xingyun's remarks can be justified.
Based on these clues, Gu Chen, Officer Wang and Lu Weiwei did not get the exact result from Liu Xingyun.
But Gu Chen is certain that the possibility of Zhang Hui surviving is getting lower and lower, and the murderer is definitely related to Liu Xingyun.
After temporarily taking Liu Xingyun into custody, Gu Chen, Officer Wang and Lu Weiwei returned to the Criminal Investigation Group Three office.
When Gu Chen walked back to his seat, the first thing he did was to pick up the water glass on the table and drink it in one gulp.
"What should we do? This Liu Xingyun is really too cunning." Lu Weiwei was so angry that she threw the documents and transcripts on the table and sat back in her seat angrily.
Seeing that Gu Chen was unmoved, Lu Weiwei turned to him and asked: "Junior Brother Gu, are you just going to let him get away with it?"
"Of course not." Gu Chen leaned back and said, "From the current clues, we can see that Zhang Hui was most likely killed by Liu Xingyun, at least on the night she disappeared."
"But what's the use of knowing all this?" Officer Wang spread his hands and sighed helplessly: "The blood on the pillow does have Liu Xingyun's fingerprints."
"But Liu Xingyun's way of defending himself is theoretically sound, even though we all know that this is all nonsense."
"But without strong evidence and no witnesses, it is really difficult to confirm, at least for now."
"Evidence? What other evidence can there be?" Yuan Shasha, who was sitting in the row behind Gu Chen, couldn't help but complain.
At this moment, Gu Chen opened the drawer, took a small transparent evidence bag in his hand, and observed it casually.
Lu Weiwei was stunned and hurriedly asked Gu Chen: "Junior Brother Gu, what is that in your hand?"
"A woman's long hair." Gu Chen said casually.
"A woman's long hair?" Lu Weiwei was stunned and asked with some confusion: "Where did you find this?"
Gu Chen raised his head and said, "Where else could it be? Of course on the bloody pillow."
"That should be Zhang Hui's, right?" Officer Wang said.
Gu Chen nodded slightly: "Maybe, but Zhang Hui's body has not been found yet, and what I need now is a known hair sample of Zhang Hui in order to understand the characteristics of her hair."
Thinking of this, Gu Chen looked around and said: "It seems that I haven't started checking the hair evidence in this case yet. Should I change my identity now? Become a hair inspector?"
"But...Senior Brother Gu, Zhang Hui's body has not been found so far, so you can't test Zhang Hui's hair?"
Yuan Shasha's reminder made Gu Chen's eyes light up.
"Yes, without Zhang Hui's body, how can I extract Zhang Hui's hair? Maybe the hair on the pillow is not necessarily Zhang Hui's."
"That's right." Lu Weiwei nodded silently and said in agreement: "Since Zhang Hui's body has not been found, we cannot conclude that the hair on the bloody pillow belongs to Zhang Hui."
Seeing that Gu Chen was staring at her head, Lu Weiwei felt a little embarrassed and quickly asked Gu Chen: "You...what are you looking at?"
"I was thinking...how can we extract the client's hair without touching the client?"
"That can only be done when the person involved is getting a haircut..." Yuan Shasha thought for a moment and quickly corrected: "That's not right either. The hair that falls off after a haircut doesn't even have roots, so it can't be detected at all."
After hearing what Yuan Shasha said, Gu Chen suddenly snapped his fingers: "I know how to extract it."
"Do you know?" Seeing Gu Chen's confident look, Officer Wang quickly asked him: "Gu Chen, tell me, how can you remove the client's hair without touching the client?"
"It's very simple. We can start with the comb Zhang Hui usually uses to comb her hair."
Seeing that everyone was dumbfounded, Gu Chen quickly gestured with his hands and said: "comb, comb, maybe the comb can extract the hair of the person involved."
"Yeah, why didn't I think of that?" After hearing Gu Chen's words, Lu Weiwei suddenly realized: "I usually comb my hair with a comb, and it will bring out some hair. How could I forget about this?"
"So..." Officer Wang said.
"So we should go to Zhang Hui's house now, collect Zhang Hui's hair, and compare it with the hair I found on the blood pillow in the woods to see if it belongs to Zhang Hui."
"Then what are you waiting for?" Officer Wang was already tired of the battle of wits and courage with Liu Xingyun.
As long as there is a clue that can bring Liu Xingyun to justice, Officer Wang will never tire of it.
Just do it.
Gu Chen stood up directly, waved to several people and said, "Let's go now."
…
…
Drove to the door of Zhang Hui's house.
At this moment, Zhang Fan, who was spending his summer vacation, didn't seem happy.
The disappearance of his sister Zhang Hui made Zhang Fan extremely frightened and even regretful.
If I had been able to call and confirm in time when I received the message from my sister Zhang Hui, I might have discovered something fishy.
But some are just ifs.
“Tuk-tuk-tuk.”
Just when Zhang Fan was lying on the sofa in the living room drinking, there was a knock on the door.
"Who is it?" Zhang Fan yelled helplessly.
"I am Gu Chen from the Criminal Investigation Team Three of Furong Branch." Gu Chen said outside the door.
Hearing that it was Gu Chen's voice, Zhang Fan was startled for a moment, but he quickly sat up and then trotted to the door barefoot, "dong dong dong", and opened the door directly.
This chapter is not over yet, please click on the next page to continue reading the exciting content! "Officer Gu, why is it you?"
"We need to extract a hair sample from your sister Zhang Hui." Gu Chen directly explained the reason.
Zhang Fan scratched the back of his head and asked in confusion: "Take my sister's hair sample? But my sister doesn't even know where she is, how do you extract it?"
Lu Weiwei, who was beside Gu Chen, laughed and said, "You are stupid, you extracted it from a comb. Don't tell me that your sister doesn't even have a comb for separate use?"
Zhang Fan slapped his head: "Yes, how could I forget this? My sister is more than just a comb? She has several."
"Where are they all?" Gu Chen asked.
"There are them in the bathroom and in the room. I'll get them for you right away." After Zhang Fan finished speaking, he walked towards the bathroom.
Not long after, he took out a log comb and said, "My sister Zhang Hui usually uses this special comb, and my sister's hair does still remain on it. Is this okay?"
"Okay." Gu Chen put on white gloves and put the log comb directly into a transparent evidence bag. Then he smiled and said, "No one else has used this comb, right?"
"No, my sister usually uses it, and we all use it in our own way, so there is no conflict." Zhang Fan was also very sure.
Gu Chen nodded slightly: "That's good, now we have to take it to the Technical Department of the Municipal Bureau for testing."
"Okay, but please find my sister quickly." Zhang Fan held his forehead and felt a little frustrated.
I feel like my life is a mess without my sister at home.
Gu Chen patted him on the shoulder and encouraged him: "Please believe that our police will help you find your sister."
…
…
Taking the comb he found from Zhang Hui's house, Gu Chen didn't go anywhere else, but went straight to the Technical Section of the Municipal Bureau.
In the testing room of the technical department, Gu Chen personally took out the long hair that was tangled with the comb on the platform, not even missing every strand.
Gu Chen never even thought that the hair on Zhang Hui's comb could be used as testing samples.
After removing the hair stuck between the teeth of the comb, Gu Chen placed the hair under a stereoscope to view it, which allowed Gu Chen to see the general shape and color of the hair.
Is the hair sample straight or curly? Is it slightly wavy? Is the hair texture coarse?
Because Gu Chen wanted to record the above properties of each hair.
Gu Chen extracted a total of about 50 hairs from the comb.
The next step Gu Chen had to do was to place each hair on a microscope slide.
The purpose of this is to put the hair in a stable environment so that when Gu Chen puts the hair under the contrast microscope, the hair can remain still.
Gu Chen could then put these slides under a microscope to view their internal features.
Through these, we can observe whether there are any larger color spots in Zhang Hui’s hair?
What are the shapes of these color classes?
Are they dense?
Is it distributed throughout the hair?
Gu Chen began to record these situations according to his own requirements.
What kind of color spots are there in Zhang Hui's hair, how often these color spots appear in her hair, etc. These are the focus of Gu Chen's investigation, and then he will observe another hair.
And the same thing, the feature that Gu Chen noticed in this hair, was put under the microscope on another glass slide, and the same phenomenon was observed.
"Zhang Hui's hair still has quite stable characteristics, which is good." Gu Chen took a deep breath and then started to put another slide on it.
But at this moment, Gu Chen suddenly stopped and narrowed his eyes slightly: "Oh my God! What is going on?"
"What's wrong?" Police Officer Wang, who was standing aside and watching, asked.
Gu Chen did not answer immediately, but continued to adjust the instrument.
The expression that followed was equally surprised.
"Any... special discoveries?" Lu Weiwei was afraid of disturbing Gu Chen, so she could only ask him in a low tone.
Gu Chen withdrew his gaze, sat up straight, and then explained to everyone: "Guess what I found? A wig fiber."
"Wig fiber?" Everyone said almost in unison.
"How come there are wig fibers? Aren't they all extracted from Zhang Hui's special comb?" Lu Weiwei said she couldn't understand.
Gu Chen was stunned, then said with a slight smile: "Don't panic, wait until I finish the test before I draw a conclusion."
Then Gu Chen immersed himself in testing again.
It wasn't until Gu Chen extracted all the hair from the comb and tested all the hair one by one that he got the exact answer.
Gu Chen turned to look at everyone and couldn't help but said: "I checked every hair among them, and indeed only that one is a wig."
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