Rebirth 78, the beginning of the marriage was broken off by the female educated youth

Fisherman's knot variant?

"What is this?" Forensic Doctor Wang was obviously unfamiliar with the knot that Li Xiangnan was talking about.

Not to mention that the assistant Xiao Dan didn't recognize it. He stared at the knot raised by Li Xiangnan for a long time, completely confused, and shook his head like a rattle.

"Did Old Duan teach you?" Guo Qian instantly understood why Li Xiangnan knew this kind of knot!

"That's right!" Li Xiangnan nodded without hesitation, saying, "My college roommate, Duan Sijiu, is a fisherman! When he was hanging clothes in the dormitory, he felt the sunlight wasn't strong enough, so he tied a rope in front of the window using this kind of knot. I was curious at the time, so I asked him how to tie it..."

He held up the knot and spoke word by word, "This knot ensures it won't come loose easily after bearing weight, and it gets tighter the more you pull it. Look at this knot, it's tied neatly, obviously by an expert! As everyone knows, Xu Sheng is an intellectual, so how did he know how to tie this knot? This is a knot used for special occasions!"

Forensic Doctor Wang understood. "So, only fishermen or mountaineers would learn to tie this kind of knot, to prevent themselves from falling or to secure items on a boat?"

"Correct!"

Li Xiangnan nodded: "This knot is beyond Xu Sheng's living habits, it is obviously not his own way!"

Guo Qian said admiringly, "So even if there are no cloth shoes, no smell, and no signs of struggle, this alone is enough to arouse suspicion - Xu Sheng didn't commit suicide!"

"That's fair to say!" Li Xiangnan lowered the knot. "Then, following what Forensic Doctor Wang just said, think about Xu Sheng's recent mood and state. Has he expressed any desire to end his life?"

"Absolutely impossible!"

Guo Qian shook his head in a determined tone. "During the interrogation the afternoon before yesterday, Xu Sheng was still citing Freud's theories to defend himself. His thoughts were clear, and there was no sign of despair. He even defended himself and wanted to fight for the longest possible life sentence!"

"Then things get interesting," Li Xiangnan sneered, "A person who didn't want to die was killed here. Why?"

motivation!

All crimes require a sufficiently strong motive.

This is what makes people take risks!

So, whose interests did Xu Sheng touch, causing someone to have murderous intentions towards him?

Did he not hesitate to use countless resources to set up all this in the cell, resulting in a carefully planned and almost successful closed-room murder case?

If Li Xiangnan had not come in person, he probably would not have found so much evidence to prove that Xu Sheng's death was not an accident or suicide!

Of course, Guo Qian will find evidence to prove homicide, but it will definitely be later than himself!

"Forensic Doctor Wang, have all the details been taken care of?" Li Xiangnan asked at this time.

"It's all done! Actually, I finished it within the first hour I was here, but in order to make the chain of evidence more complete, I deliberately dawdled here for two hours, waiting for you to come and take a look, so as to prevent the crime scene from being destroyed as much as possible!"

Forensic Doctor Wang said cunningly.

Li Xiangnan nodded, but suddenly shouted, "Xiao Dan, go ask the supervisor for a roll of tape."

"What are you gluing?" Assistant Xiaodan was stunned and didn't react.

Forensic Doctor Wang next to him was also stunned for a moment and looked at Li Xiangnan with some confusion.

"Film or tape will do!" Li Xiangnan waved his hand and emphasized.

Guo Qian and Forensic Doctor Wang looked at each other, somewhat bewildered.

Li Xiangnan didn't explain, but waved his hand.

"Go!" Forensic Doctor Wang was confused, but he also urged his assistant.

"Yes!" Xiaodan opened the prison door and walked out quickly.

The three of them waited patiently in the prison, while Guo Qian and Forensic Doctor Wang were curious about what Li Xiangnan would do next.

Only three minutes had passed when Xiaodan hurried back.

Li Xiangnan took the film, tore it open, and taped it near Xu Sheng's neck. He demonstrated, "Watch carefully, Xiaodan. Use my method to get evidence for everything you suspect!"

Forensic Doctor Wang was shocked and stared at him, "You want to take..."

"fingerprint!"

Li Xiangnan said with narrowed eyes.

"Fingerprints?" Guo Qian and Forensic Doctor Wang looked at each other and were shocked.

"Human fingerprints are a type of biological information, and each person's fingerprint is unique! If the murderer's fingerprints are left here and we collect them, then things will become simple. We can directly identify the murderer!"

boom!

As soon as these words came out, the eyes of forensic doctor Guo Qianwang and his assistant Xiao Dan suddenly widened, their scalps instantly went numb, and ecstasy appeared in their eyes.

"Is it possible?" Xiaodan was speechless.

Li Xiangnan also began to explain.

Article 132 of my country's Criminal Procedure Law stipulates that in order to determine certain characteristics or injury status of the victim or suspect, a physical examination may be conducted, fingerprint information may be extracted, and biological samples such as blood and urine may be collected.

This was a resolution adopted at the Fifth National People's Congress in 1979 and came into effect in January this year.

However, nationwide, public security organs rarely use fingerprints to investigate cases, and the practice has not been widely popularized.

What Li Xiangnan wants to do is to help the police, starting from today's Xu Sheng case, to speed up the process of fingerprint investigation and increase the efficiency of solving the case!

Of course, he also knew that this matter did not become a reality until the nationwide fingerprint crime-solving campaign was launched in 03, which realized the first nationwide fingerprint information network comparison and marked the establishment of a modern fingerprint crime-solving system.

Now that there is no Internet, we can only collect fingerprint information within a certain range for comparison, but it is better to have it than not.

Xu Sheng died in prison. His death was suspicious. Judging from various information, it was murder.

Then Li Xiangnan would have to bet that the person who killed him would reveal a flaw in his fingerprints.

As long as one fingerprint is identified and matched with someone in prison, the murderer will definitely be brought to light.

of course.

Before he came, many people had been to the scene, but there were not enough of them and they were also recorded by the prison. Once there were fingerprints beyond these people, the truth would be close!

"Consultant Li!" Forensic Doctor Wang was already completely impressed by Li Xiangnan. "Your knowledge is truly vast. Honestly, at my age, I feel like I've wasted my life in your presence!"

"Me too!" Guo Qian raised his hand.

"Me too!" Assistant Xiaodan couldn't help but express his opinion.

The four of them smiled knowingly.

Li Xiangnan waved his hand and said, "Thank you guys! Search all the suspicious places as much as possible and collect fingerprints! Then take some time to collect fingerprint information from the entire prison. Remember, everyone, including prisoners and guards!"

"Yes!"

The three of them took action immediately as if they had been injected with chicken blood.

Li Xiangnan looked around, picked up the psychology book on the table and took a look, then walked out of the cell, walked into the corridor, took out a cigarette from his pocket and started smoking.

He flipped through the book "Application Examples of Child Psychology in Practical Applications" while smoking a cigarette and looking at Deputy Warden Shi who was standing outside an office not far away.

After he flipped through the book for a while, his eyes suddenly became sharp.

There were many annotations on the pages, with pencil lines underlining some of the words.

There are not many words on each page, but there are a lot of drawings before and after.

It feels like someone drew it accidentally.

But these details are enough to attract Li Xiangnan's attention.

He closed the book, walked up to Deputy Warden Shi, and asked casually, "Warden Shi, who helped Xu Sheng borrow this book?"

"Huh? What's the problem?"

What's the problem?

The problem is big!