Criminal Psychology

Speculations arose one after another, and Lin Chen Xing Conglian remained silent.

That's right, all the physical evidence is missing, Lin Chen doesn't even suspect that there may be some witnesses who witnessed Duan Wanshan in two days.

The current situation is very interesting. They are surrounded by colleagues and comrades who have always supported them, but they have no way to tell each other that Duan Wanshan is really dead, so you all guessed wrong.

Lin Chen couldn't help coughing, this kind of feeling that the enemy is in the dark and I am in the light is really not good, and it is even more unacceptable that these conspiracies revolve around the dead Duan Wanshan.

Xing Conglian cast a concerned look, Lin Chen looked at the other party's dark eyes under the incandescent light, and said, "Shall we go to the forensic room?"

"it is good."

……

The forensic doctor of Hongjing Police Station is a lady with bright red curly hair.

When they arrived at the door, the forensic doctor was holding milk tea and carrying a bag to get off work.Xing Conglian went over and pressed the door, and pushed the man back into the office.

"Hey, I like girls, stay away from me." Forensic doctor Yu shouted.

"It's okay, I like men." Xing Conglian said.

Lin Chen pushed the door open and went in, only to see that Xing Conglian was pressing the forensic doctor lady into the chair, grabbed the pearl milk tea from her hand, and threw it into the trash can accurately.

"Xing Conglian your sister!"

"Why are you in such a hurry to get off work?" Xing Conglian asked sharply.

"Damn it, brother, it's already seven o'clock in the evening, and I've been working overtime for two hours, okay?" Forensic doctor Yu was very impatient.

"Then sit down for a while."

Xing Conglian dragged a chair while Lin Chen sat down, and greeted the beautiful lady in front of him: "Forensic Doctor Yu."

"Consultant Lin."

"Is there any way to falsify DNA evidence?" Lin Chen asked bluntly.

"Consultant Lin!"

Forensic doctor Yu's face darkened: "It's fine if I don't let me go off work, why come here suddenly to ask such a strange question!"

Lin Chen said: "We suspect that the DNA sample belonging to the suspect Duan Wanshan on the murder weapon in the Stankang case was forged."

For a long time, Forensic Doctor Yu did not speak.The smell of formalin wafted in the air, and the smell of fresh jelly water from the forensic redhead.

"What do you mean?" the forensic doctor raised his legs and asked seriously.

Lin Chen replied: "Duan Wanshan has been abroad and has no entry record. It is impossible to suddenly appear in Hongjing and kill someone."

"You who are engaged in criminal investigation should be able to find hundreds of ways and possibilities for him to come back." Forensic doctor Yu said.

Lin Chen said concisely: "Impossible."

"That's fine, according to what you said, even if someone framed him and stole his blood sample and stained it on the handle of the knife." Forensic doctor Yu switched legs and raised his legs.

"Impossible."

"Why?" The female forensic doctor suddenly leaned forward.

"I can't tell you for now."

"You're trying to force me to death." Forensic doctor Yu leaned back on the chair, as if I've been tested, and you can't help me.

Lin Chen continued to press: "So, we need a possibility, a possibility that Duan Wanshan has nothing to do with this incident, but a blood sample containing his DNA will appear on the handle of the knife."

The red-haired female forensic doctor's expression froze, her willow eyebrows raised high: "I see, you want me to tell you, is there any way to falsify DNA evidence?"

"Yes."

"Have you ever thought about how much pressure will be put on the prosecution in future court debates if a typical case of DNA evidence falsification occurs, and countless defense lawyers will use this to attack the reliability of forensic identification." Forensic doctor Yu asked back.

"But this is an unavoidable problem. In this case, I am sure that evidence was falsified." Lin Chen insisted.

Finally, Forensic Doctor Yu sighed and said, "It's actually very simple."

"How easy?"

"Suppose, I can get your DNA sample, it doesn't need much, even a strand of your hair is enough. A large amount of DNA is amplified through certain techniques, and then a tube of old prisoner's blood is drawn, passed through a centrifuge, Isolate white blood cells containing DNA, and then add your DNA to Lao Xing's blood..."

Lin Chen looked directly at the forensic doctor: "The tube of blood will only belong to me, not him after the judicial appraisal."

The beautiful female forensic doctor nodded solemnly: "This is just the simplest method, and even undergraduates in biology can do it."

"I understand." Lin Chen stood up and greeted, "Thank you."

"You questioned my appraisal result and wanted to run away after saying thank you?"

Lin Chen lowered his eyes and said to Forensic Doctor Yu, "Actually, there is one more thing I want to know."

"Your eyes are very cruel." Forensic doctor Yu looked at him with folded arms.

"I suddenly realized that you didn't explain some things clearly to us." Lin Chen said lightly, "Although I don't know the specific division of the gene pool, you can find out that it is Duan Wanshan's DNA so quickly, which still surprises me. surprise."

"Damn, you are doubting me!"

"I'm looking for answers."

Forensic doctor Yu stared at him for three seconds, took a long breath, took off the hair tie from his left wrist and tied his hair up high, took out his notebook from his backpack, and snapped it open: "Do you know the Dingyuan Forum? "

Lin Chen frowned: "Medical forum?"

"It's the largest medical-related forum in China." Forensic Yu turned on the computer, "I'm an administrator of a sub-forum, so I go up to deal with site affairs basically every day." Forensic Yu paused, "I'm explaining this to tell you , I am not provoking trouble."

Lin Chen nodded.

"It's not like this style of painting if I want to really pick things up." Forensic Doctor Yu clicked on the forum, entered the keyword "plagiarizing Stankang" in the search box, and then pressed the Enter key, "About a month ago, someone posted posted a post, implying that Stankang plagiarized Duan Wanshan's research results, because the two are academic experts, and the discussion was quite heated. But the host didn't provide any key evidence, so let it go."

Lin Chen's heart trembled, and he finally realized where the anxiety in his heart came from.If the other party plans to frame Duan Wanshan, they will definitely make a complete chain of evidence, which includes not only physical evidence, but also the motive for the murder, and now that this post exists, the motive for the murder is ready to be revealed.

Duan Wanshan was plagiarized by Stankang because of his research results, and he returned to China to murder Stankang with a grudge.

"After Stankang's death, this post was upvoted again by someone with a heart." Forensic Doctor Yu said meaningfully, "You know..."

Xing Conglian came over to glance at the various conspiracy theories on the webpage, and shouted: "Dynasty!"

"Why didn't you say it before?" Lin Chen asked the forensic doctor Yu, "You knew about the existence of this post, so you deliberately went to the citizen gene bank to check Duan Wanshan's DNA, right?"

"Hey, you are forbidden to look at me like that!" Forensic doctor Yu's apricot eyes widened, "I obviously hid this post because I was on Duan Wanshan's side, okay? Can I not report his DNA?"

The young man pushed open the door quickly and came in. Seeing the three people in the forensic room, especially the red-haired woman, they took half a step back: "Why don't you talk first?"

"Get over here." Xing Conglian said.

Wang Chao walked up to the forensic doctor step by step. Seeing the laptop on the table and the contents on the computer screen, he quickly rushed over and dragged the mouse to examine it carefully.

In the end, the young man said to them very apologetically: "I'm sorry, Boss Chen, I was negligent. I didn't expect this would involve an online debate."

Xing Conglian didn't joke with him anymore, he just said, "Check your IP."

Wang Chao nodded and started to work quickly.For a while, there was only the sound of typing keyboards and mice rapidly in the office. Looking at the ever-changing computer screen, Lin Chen had even worse guesses in his mind.

"Yes." Chao Chao casually tore off a sticky note and wrote down a string of numbers.

"The specific address of the person who posted it." Xing Conglian said.

Wang Chao turned his head and continued working. Not long after, his brows became more and more tight: "The posting address is in Hongjing, which is very close to our home..."

Lin Chen raised his eyes suddenly.

Wang Chao stared at the screen and read: "No. 7 Cangjia Lane, darling pet shop."

When Lin Chen heard the words "pet shop", the blood on Lin Chen's face faded instantly, and he coughed violently.Seeing this, Xing Conglian felt his heart tighten, and hurriedly patted him on the back.He held Lin Chen's hand, only feeling that his palm was hot: "I'll take you back to the hospital first, and then go to the pet store."

"No need." Lin Chen interrupted him, suppressing the discomfort in his lungs, and looked up at Forensic Doctor Yu.

"You mean to let me get off work because I have something private to talk about right now?"

"Sorry." Lin Chen nodded.

Forensic Doctor Yu pointed to his laptop: "I told you that you are not allowed to peek at the pornographic videos inside."

"You can take it away." Lin Chen said.

"You didn't say it earlier." The beautiful female forensic doctor glared at them, picked up her notebook and left. When she was near the door, she turned her head and gave them a worried look.

The door closes.

"What happened?" Xing Conglian asked.

Lin Chen took a deep breath: "That's a post from Duanyang."

Lin Chen couldn't describe the feeling in his heart at all, maybe because he had a fever again, he felt chills all over his body.

In fact, after experiencing everything in the rainforest, he would never doubt Duan Yang's feelings for Duan Wanshan. If possible, Duan Yang would be happy to die for Duan Wanshan.

Well, since Duan Yang had no intention of framing Duan Wanshan, this matter has turned into—perhaps a long time ago, someone deliberately used Duan Yang to design and frame Duan Wanshan.

Every step Duanyang thought he took to avenge his teacher, every trace left on the Internet, may have been designed to push Duan Wanshan into the clutches of the abyss in the eyes of the instigator behind the scenes.

If Duan Wanshan hadn't died, all of this would have happened naturally, and Duanyang's thoughtful behavior would have hurt the teacher.

It's a pity that Duan Wanshan died...

This kind of arrangement may be just a small amount of malice, but it is as strong as ink, and the smell is extremely fishy.

Lin Chen's mind was chaotic for a moment, but no matter what, there were some things that had to be done: "We need to confirm two things."

Xing Conglian nodded.

"First of all, in order to confirm the real purpose of those who forged DNA evidence, we need to confirm with Duan Yang whether there is anyone else who knows the news that Teacher Duan has died besides us." Lin Chen paused, then said, "Secondly, We must learn from Duan Yang about the whole process of Stankang plagiarizing Teacher Duan’s academic research results. If the murderer didn’t improvise to frame Duan Wanshan after seeing Duan Yang’s post, then this is a deliberate conspiracy. In my opinion, the latter more likely."

"But...but do we want to tell Duanyang about this?" Wang Chao began with difficulty, "How uncomfortable he must be."

Lin Chen looked at the young man's troubled face and said, "He has the right to know."