"Consultant Lu, all the evidence you want is here." Qi Huan brought Mu Feng to the evidence room and called out the evidence that Lu Xiyan wanted to view.

One cardboard box and five evidence bags are arranged neatly.

From left to right, Lao Jia was the first one. He opened the bag and poured out the things inside, matches, a small cloth bag, a belt, and some fragments of banknotes, copper coins...

Then there are Xie Changgui's, Tian Sen's, Zhang Zhijian's, and Wu Yougen, which are mostly caring things, including wallets, banknotes, oceans, cigarettes, lighters, and amulets.

"Where is Red Pill, why didn't Red Pill be found?"

"Xie Changgui confessed that he did not carry the Red Pill with him, but hid it in the compartment under the bed of his sleeping bed. Whenever he was given to Weng Xiong, the Inspector had sent someone to search the safe house." Qi Huan explained.

"Why are there only personal belongings and their clothes they wear?" Lu Xiyan asked.

"After searching, they were asked to wear clothes..."

"I'm confused, clothes are important evidence. Why not leave their clothes?" Lu Xiyan asked sternly, "Don't you know that any of them is suspected of murder?"

"Consultant Lu, this has been searched. You can't let them sit naked in the work room, right?" Qi Huan was stunned.

"Doesn't the class room have a number clothes? Even if there isn't, it's okay to buy them a few sets of old clothes?" Lu Xiyan snorted. The clothes might be directly exposed to poison. If the poisoning person is accidentally injured, this is the most direct evidence.

These people just searched and didn't find that they just let them go. It's too hasty.

No wonder the case cannot be solved in this way.

"Go to the detention room immediately and bring me all the clothes of the five people. Do you know what to say?" Lu Xiyan ordered.

"I know." A layer of sweat appeared on Qi Huan's forehead. He thought to himself that Lu Xiyan, who looked warm, was not weaker than Detective Tang.

More than ten minutes later.

Qi Huan came in with five plainclothes agents, each holding a bunch of clothes in his hands. This guy was quite smart and didn't mix the clothes of the five people together.

"You all know whose clothes you have, right?" Lu Xiyan asked.

"Know!"

"Very good, search me carefully. The key is the cuffs, collars and pockets. Don't let me go if there are any clues." Lu Xiyan ordered.

"yes!"

"Let's start." Lu Xiyan waved his hand, and the five began to check each of the five people according to the search process Lu Xiyan said.

Lu Xiyan and Qi Huan stared at the five people's inspection actions.

"Consultant Lu, no notice!"

“…”

"Consultant Lu, come and see..." One of the agents raised his hand and shouted.

Lu Xiyan walked over quickly.

During the inspection, the police opened a pocket and found that some tobacco had accumulated in the corner, which looked quite fresh.

"Is it just a little tobacco worth such a fuss?" Qi Huan also leaned over and said unhappy, "There is no bit of tobacco left in the pocket of the smoker?"

Qi Huan is right. After the cigarette is opened and put in his pocket, some tobacco always runs out and falls into his pocket. This situation is often found in the pockets of people who often smoke, which is strange.

But Lu Xiyan didn't think so. The tobacco in the pocket of this dress didn't seem to be scattered, but it seemed like someone deliberately crushed it.

“Whose coat belongs to this coat?”

"Report to Consultant Lu, it's Tian Sen's." The inspector replied.

"Does Tian Sen smoke usually?" Lu Xiyan asked Qi Huan. Although he had read Tian Sen's file, the information in the file could not represent everything.

"I also smoke occasionally, but it's rare." said an agent.

"I'll ask, does anyone know what brand of cigarettes Tian Sen usually smokes, the faster the better." Lu Xiyan ordered.

"Okay, I'll go now."

"You guys keep checking, find me a brush, and have a soft hair, and a bag of evidence."

"yes."

Carefully collected all the tobacco in the corner of his pocket, put it in a paper bag, and then sealed it up. He intuition told him that the tobacco would be the key to cracking the traitor's poisoning.

Soon after, Qi Huan hurried in.

"Consultant Lu, Tian Sen usually draws red tin bags."

"I'll buy a pack back." Lu Xiyan ordered, and Qi Huan said directly, "I have already ordered Ma Xiaowu to go out and buy it."

"Smart!" Lu Xiyan nodded.

...

After coming out of the laboratory of the forensic department, Lu Xiyan ordered Qi Huan lightly: "You can interrogate Tian Sen. If nothing unexpected happens, he is the traitor who poisoned Weng Xiong."

"It's him?" Qi Huan was shocked.

"Go to work, I'll find you Detective Tang." Lu Xiyan nodded.

"good."

Tang Jin's office was only about an hour and a half before Lu Xiyan left his office.

"Brother Tang, fortunately, I'm not disgraced."

"Have you found the murderer?" Tang Jin's eyes were glaring out. His subordinates had been struggling for a long time and found nothing. When Lu Xiyan arrived, he solved such a difficult case in less than two hours.

"The murderer was secretly secret. He thought he had crushed the cigarette butt with his fingers and hid it in his pocket. He thought he was unaware of it, but he was still exposed in the end." Lu Xiyan took out a paper bag of evidence.

"Cigarette butt?"

"Yes, the way the murderer poisons is not food or water, but cigarettes." Lu Xiyan said, "According to my inference, the murderer pretended to be convenient. He passed by Weng Xiong's cell. Weng Xiong was an addict. He must have been stinging his heart when he smelled the cigarette. So he asked the murderer for a cigarette, which gave the murderer a chance. He handed over a poisonous cigarette. How could Weng Xiong have his life?"

"Then what happened to this cigarette butt?"

"After Weng Xiong smoked, he died, he would naturally leave cigarette butts. The murderer pretended to be the first to discover Weng Xiong's death and wanted to destroy evidence. The ashes on the ground could be filed with his feet and could not be detected at all. However, the cigarette butt that had not been burned was not kept at the scene. He could only put them in his pocket first and threw them away when there was no one. However, the murderer was smart but was mistaken. If he threw them away at the scene of death at will, even if we saw it, we would not pay attention. He hid in his pocket and crushed them with his hands, disguised as tobacco remaining in his pocket. He had passed the inspection. It was normal for a smoker to have some tobacco left in his pocket. However, he forgot that after the tobacco was burning, the smell was different, not to mention that the tobacco was poisoned..." Lu Xiyan explained carefully.

Tang Jin was stunned when he heard this.

"Brother Tang, of course these are just reasoning and guessing. However, if you can find out whether there are burning marks between Weng Xiong's fingers and analyze the toxins in the tobacco and compare them with the poisons in Weng Xiong's place, then it will be almost certain."

"No need to look for it. I have checked Weng Xiong's body in detail. There are signs of burning and yellowing between his index finger and middle finger of his right hand." Although Tang Jin could not find the murderer, he was not a person who was eating. How could he not find such obvious details?

"Inspector, I've called it, I've called it..." As soon as he finished speaking, he saw Qi Huan pushing the door happily.

"Is the murderer Tian Sen?"

"That's right, Consultant Lu is really amazing. He actually noticed clues from a little bit of tobacco and pulled out the traitor hidden among us." Qi Huan was extremely excited.

"Okay, I understand. I will deal with Tian Sen's affairs. I can't say much to the outside world!" Tang Jin explained.

"Yes, Inspector." Qi Huan has been following Tang Jin for several years, so how could he not know the principle of "family scandals should not be made public". If people outside know about it, then the political department would be embarrassing.

Twist...

"Come in?"

A middle-aged man in his forties came in. He was thin, wearing a long robe, with a stiff expression, and his face seemed to be like someone owed him some money.

"Inspector General Cheng, please sit down!" Tang Jin was stunned for a moment when he saw the visitor.

In addition to Tang Jin, there is also a powerful figure in the Chinese arrest, Cheng Ziqing, the veteran inspector general. He is the leader of the entire Political Department.

In other words, he is responsible for most of the intelligence work of the Political Department. Of course, he is only responsible for collecting some situations in the French Concession, especially the Chinese.

Cheng Ziqing is still a member of the Qing Gang and is a sworn brother with Boss Du. His is less prominent than many people, but his energy is definitely not small.

"Detective Tang, Tian Sen is my person. I want to take him away. Please give me some convenience." Cheng Ziqing said to Tang Jin directly without sitting there.

"Inspector Cheng, is this not in accordance with the rules?" Tang Jin was slightly stunned. He didn't expect that Cheng Ziqing asked him for someone as soon as he spoke, but this person was actually Tian Sen.

"Boss Du issued a killing order, Weng Xiong must die!"

Tang Jin was stunned for a moment. Weng Xiong's death was actually related to Boss Du, which he had never expected.

"Inspector Cheng, do you know what consequences will be caused by Weng Xiong's death at this critical moment?" Tang Jin was a little angry. It was a pity that Weng Xiong was not willing to cherish, but at this time, the Japanese used Zhou Yuanquan to be assassinated and caused trouble in the French Concession.

It is hard to say whether killing a Weng Xiong will anger the Japanese, but at least it will make things complicated.

He almost misjudged that this was the Japanese instructing him behind the scenes and deliberately causing trouble for him. Now, it was the one who Boss Du ordered to kill him.

"Weng Xiong is a member of the Qing Gang. He broke the rules set by Boss Du. If he becomes a traitor, he will only have a dead end. Detective Tang, as for your trouble, Boss Du will not treat you badly." Cheng Ziqing said.

"Okay, Tian Sen, I can leave it to you, but he can't stay in the French Concession."

"Detective Tang don't worry about this. I will arrange to send him to Hong Kong immediately. As long as Detective Tang gets a good net, it's enough." Cheng Ziqing clasped his fists and said.

"Who will take the blame for Weng Xiong's death?"

"If the murderer is not caught, he is naturally a Japanese." Lu Xiyan naturally understood very well. At this time, he spoke without hesitation.

"This must be Lu Xiyan and Lu's consultant, indeed, he has his own tricks!" Cheng Ziqing said with a rare smile on Lu Xiyan.

"Inspector Cheng is polite."

"Detective Tang, let's make up for this affection, let's say goodbye." Cheng Ziqing bowed slightly, shook his long sleeves, turned around and left.

"Brother Tang, I should leave too. Don't worry, I will rot in my stomach and no one will say it." Lu Xiyan said to Tang Jin, who was so angry that he couldn't make a comeback.

"Thank you for your hard work, Brother Lu, I'll send someone to take you back."

"No need, I'll go to Zhendan University." Lu Xiyan remembered that Meng Fanxing came to Zhendan University for the first day today. He didn't know what the situation was, so he wanted to go and take a look.

Tang Jin waved his hand, and he was wondering, how could he tell the French about this?
Chapter completed!