C78

When Chen Hui came out of the medicinal material bank, it was about time for him to leave school. He did not go to the school doctor's office anymore and directly went out of the school to wait for Ye Mengchen.

Not long after, Ye Mengchen came out of the school, and Chen Hui and Ye Mengchen got on Ye Family's carriage to return to the Mountain Water Flower Garden.

Chen Hui carefully observed Ye Mengchen. Her mental state was not bad, and there were no hidden ailments.

However, this situation changed after dinner.

Not long after Ye Mengchen finished dinner, her entire body became extremely sleepy. She looked a little dispirited, and quickly returned to her room to rest.

The Mr. And Mrs Ye Qihong was naturally very worried. Chen Hui said: "I'll be preparing, I'll prepare some for Ye Mengchen in two days. I'll go out later to make some preparations!"

Chen Hui did indeed want to go out, but, it was not for what he said. His purpose in going out, was to meet with Lin Rong.

After Chen Hui came out of the Mountain Water Flower Garden, he took the initiative to give Lin Rong a call. Lin Rong received a call from Chen Hui, and told him to wait at the intersection.

Chen Hui did not ask much, he only asked Lee Jin about the statement.

Lee Jin had already finished recording, and Lin Rong had also repeatedly reminded him to keep it a secret before allowing him to leave the Criminal Police squad.

"Lee Jin's statement should be able to be used as evidence, right?" Chen Hui asked at this time.

Lin Rong nodded her head and said: "Of course, if there is a link in the chain of proof, without Lee Jin's records and evidence, even if we obtain the fingerprints and catch the person who snuck into medicinal material bank, there is no way for us to prove that he stole anything. With Lee Jin's records and evidence, as long as we catch the person who infiltrated our medicinal material bank, we can prove that he is a senna leaf who went in to steal!"

The chain of evidence is a legal term for the chain of proof formed by a series of objective facts and objects.

In the course of solving a crime, the police should collect the evidence widely. When the witness testimony and trace evidence combine to form the main link of the crime suspect, which can prove the crime process completely, the police can judge the suspect and take the necessary criminal investigation measures.

In other words, unless the crime scene was apprehended, the police would have to use all the evidence to form a complete chain of evidence.

The senna leaf was stolen from the medicinal material bank of the school. However, if it was not for Lee Jin's records and evidence, even if the suspect was caught, if the suspect refused to admit that he stole the senna leaf's body through the medicinal material bank and claimed that he stole other medicinal ingredients, then the evidence would be insufficient.

Furthermore, Lee Jin's statement and evidence were enough to prove that someone had infiltrated the medicinal material bank and stole the senna leaf s from the medicinal material bank. This involved a sequence issue, and catching the culprit who snuck in was already enough to form a complete chain of evidence.

Not long after, Ye Rong brought Chen Jian to the Criminal Police squad and went straight to his office. There was an elderly police officer waiting there, and when he saw that Ye Rong had returned, he immediately stood up and said, "Captain Lin!"

"Division Chief Zhang, sorry for troubling you." Ye Rong immediately pointed at Chen Hui and introduced him to the police, "This is the Division Chief Zhang Cheng from our Municipal Bureau Technology Department. In terms of leaving marks, his skills are the best."

Zhang Cheng immediately shook hands with Chen Hui, and smiled, but did not say anything.

"Should I bring Division Chief Zhang to the school to obtain his fingerprints?" Chen Hui looked at Lin Rong and asked.

"Up till now, the situation in this case is still unclear. The culprit behind the poison is a link, the senna leaf was stolen from the school's medicinal material bank, the thief is someone else, we cannot reveal ourselves." Lin Rong looked at Chen Hui and answered: "That's why I wanted Management Head Zhang to teach you how to extract a fingerprint for yourself."

"Can I?" Chen Hui asked with uncertainty.

Zhang Cheng laughed and said, "There are a lot of ways to extract a fingerprint, such as powder, magnetic powder, laser, and many other chemical methods, and there are also a lot of different methods. Captain Lin had already told me about the situation previously, the suspect would enter the medicinal material bank through dismantling the anti-theft window, and his fingerprint would be left on the metal and glass.

Zhang Cheng was right, the powder method was the easiest method to extract a fingerprint. Choose a powder with a large color contrast and sprinkle it on the surface of the item to extract the full fingerprint.

However, simplicity often meant the premise was enough. The powder method could only extract fingerprints from non-absorbent items, such as metal, glass, and tiles.

"Is it really that simple?" Chen Hui still did not believe him, and said: "It's not that I'm afraid of taking responsibility, but that I'm worried that I'm not professional enough, and will affect the resolution of the case!"

"It's really simple." Zhang Cheng said, "I guarantee that you will learn it as soon as you learn it!"

Chen Hui nodded his head, and did not say anymore, and followed Zhang Cheng to learn how to use the powder method to retrieve a fingerprint.

It was indeed very simple, had learnt it after Zhang Cheng taught him once, but after learning it, Chen Hui still asked him about the things to take note of.

Zhang Cheng naturally spoke everything he knew.

"If you have enough time, you can even take the footprints from the medicinal material bank!" After Zhang Cheng finished speaking, he said to Chen Hui: "Although after taking out the fingerprint, the chain of evidence can be said to have formed, but adding another layer of evidence will still make the chain more complete, and will be of great help in solving the case."

"Alright, I understand!" Chen Hui nodded and agreed.

Zhang Cheng said, "I'll wait here tonight. If you retrieve your fingerprint, I'll bring it back to the team for comparison!"

"I may not be able to get my fingerprints until late." Chen Hui said: "There are a lot of people in the school, it's only late at night when it's quiet that I won't be discovered."

"It's fine. In our line of work, staying up late is a very common thing." Zhang Cheng said with a smile.

"Then I'll be leaving first. I need to ask Lee Jin for the key, I can't just go through the window and enter medicinal material bank like a suspect." Chen Hui said with a smile.

Lin Rong made Zhang Cheng stay in her office to wait. She sent Chen Hui out of the squad and directly drove him to Lee Jin's home.

The statement that Lee Jin made had his detailed information, including his home address, phone number and the like. This saved Chen Hui a lot of trouble, so he did not need to ask Former Principal Chen Hong for his number.

Lee Jin received the phone call from Lin Rong and went downstairs early to wait outside the small district. When Lin Rong and Chen Hui appeared, he immediately gave the medicinal material bank key to Chen Hui.

"I'll return the key to you tomorrow." Chen Hui said.