September 20, 2009, 12:53.

Panyun City Criminal Investigation Detachment, Conference Room. Li Xiaoyun held a report in his hand, Liu Hanbiao and Bian Guan each prepared a transcript, and all the members of the team were present.

"I believe you should have completed the task I assigned, for the sake of my face, or the face of that meal. In a word, everyone has worked hard. Especially Li Xiaoyun, Sister Xiaoyun. However, we still need to delay some time, so let's summarize the information collected and do an analysis of this case. Sister Xiaoyun, let's start with you. Lang Zhijiao said loudly.

"Okay, Team Lang. The deceased, Wu Jianguo, male, 37 years old. According to the comprehensive judgment, he died of poisoning of a poisonous protein called Acacia Zi, and the time of death was between 9 and 10 o'clock last night. Acacia seeds, also known as acacia beans, acacia toxin is a toxic protein found in the seeds of the leguminous acacia bean. The lethal dose ingested by adults was 0.1 μg/kg~1.0 μg/kg, and after testing and analysis, the blood content of the deceased exceeded 20 times this standard, and the internal organs of the deceased had ulcerated. After verification and comparison, the bottle of red beans was retrieved on the spot, which was acacia beans. The vomit of the deceased and the red bean and barley porridge in the pot also contained the toxin. Team Lang is right, the lethal thing should be acacia beans. Li Xiaoyun recounted competently, suddenly paused, and then said: "However, Team Lang." Acacia toxin is partially inactivated at 60 degrees Celsius for 30 minutes, mostly inactivated at 80 degrees Celsius for 30 minutes, and completely disappeared at 100 degrees Celsius for 30 minutes. The temperature of boiling porridge is also 100 degrees Celsius, and the time should be about half an hour. However, a large amount of acacia toxin can still be detected in the porridge in the pot. ”

"Well, I'll explain it to you later. Brother Biao, tell me about the situation over there. Lang Zhijiao said indifferently.

"Team Lang, we learned that the deceased was a well-known chemistry teacher in school, honest and kind, and had a very narrow social circle, so he was familiar with several teachers, and they all had some exchanges in teaching. By the way, he also has a good relationship with a female dance teacher, and he only met because of some literary and artistic activities at school. When talking, it was obvious that she was very sad. As for Lu Hai, he is a casual and fashionable person, because he teaches physical education, he basically does not communicate with other teachers in the school. He was in the same office as the female dance teacher, and it was not surprising that the three of them knew each other. By the way, the deceased had a part-time job and was working as a tutor. He has not visited the family where he is a tutor. Just now, the bank faxed the list of the financial status of several people. The deceased basically gave his wife Wang Shufen 10,000 yuan every quarter, which should be a subsidy for the family. It is worth noting that the deceased paid 30,000 yuan this month, all of which was remitted to Wang Shufen's bank account. After investigation, 15,000 yuan of them was transferred to the name of the insurance company a few days ago. After verification, two years ago, Wang Shufen bought a comprehensive life insurance for the deceased worth more than one million. Otherwise, there was no abnormal flow in the couple's account. Lu Hai's bank account is also a daily expense, as well as the transfer of salary. By the way, Lu Hai had a withdrawal record a year ago, and he withdrew it one by one at the ATM, with a withdrawal amount of 150,000 yuan. I guess I lent it to a friend. Nothing else has been discovered for the time being. ”

After Liu Hanbiao finished speaking, he sat down. All the clues showed that the deceased should have committed suicide, and he thought so. Even as a veteran criminal investigation police officer, he felt that his previous visits were in vain. However, inexplicably, he had a hunch that the deceased would be the same as the newcomer Lang said, it was he who killed and murdered.

"Brother Biao, what's the name of that female dance teacher?" Lang Zhijiao asked.

"Team Lang, her name is Fang Ya." Liu Hanbiao replied.

When Lang Zhijiao heard this, he smiled slightly and nodded.

"Qin Wan, what is the result of the fingerprint comparison?"

"The Huilang team, the current comparison results, all of them are the fingerprints of the deceased. A set of fingerprints collected in the kitchen is an overlapping fingerprint, and the technical team is still separating them. It should be around three o'clock in the afternoon, and it will be done. Qin Wan said.

"Team Lang, our inquiries about the family of the deceased and the informant Lu Hai are not of much use. This is supposed to be suicide, right? Maybe the deceased's heart is already fragile......"

Bian Guan, who had not spoken, had no bottom in his heart, and whispered tentatively.

"No!" Lang Zhijiao squinted at Bian Guan, and then said solemnly: "This is a murder. Remember that the lives of the dead are as important as ours, and the dead are greater. There are so many people who commit suicide, but at least we should have respect for life. Also, every person, event, and object around the deceased records the messages they send to us during and after their death. All I need to do is use this information as an argument to prove the only truth. All we can do is to return the truth to the dead, and as for justice, it is still left to the law to judge. ”

"Oh...... Team Lang, I was wrong. Bian Guan bowed his head.

"Well, I don't blame you." Lang Zhijiao looked at everyone and continued: "There are three reasons why I said that this is a murder, not a suicide. First, the so-called suicide note on the computer is a love letter. Second, the deceased Wu Jianguo was an excellent chemistry teacher. Third, the relationship between Wang Shufen and Lu Hai is that of an underground lover. ”

Hearing Lang Zhijiao's words, several people were surprised, and their eyes were slightly solemn. Every time he said a reason, the eyes of several people widened a little.

"Okay, I'll explain. First, say it was a love letter because it was the body of an email and it wasn't sent. Recipient, I haven't checked it yet, if my guess is right, it should be the female dance teacher named Fang Ya, not Wang Shufen. If it is a suicide note, it should be sent to his wife Wang Shufen, the content of the suicide note is complete, and the signature is signed, why not send it? The deceased was suddenly poisoned, too late? The study was clean and tidy, and it was clear that the deceased was not in the study when the toxicity first appeared. The lethal dose of an adult is 20 times, and I believe that it is impossible for him to finish the suicide note and walk out of the study without leaving a trace. So, I think I went to the living room halfway through the writing because of something. In addition, I checked the emails sent by the deceased's mailbox, and there were no less than 20 of them from the same recipient, all of which were love letters. Signed: Yours Country. And this letter, signed: Wu Jianguo. Obviously, it was not written by the deceased. In other words, someone else has adapted it and has already done it. Individual keys on the keyboard, fingerprints blurred, apparently wiped by someone. So, it's an unfinished love letter that has been tampered with. Secondly, the deceased was an excellent chemistry teacher and should have knowledge in this area, which is acacia bean poisonology. Acacia beans, one bean is enough to kill him, if he wants to kill himself, it is enough to eat one. The evidence shows that the red bean barley porridge is cooked, but the acacia beans are ground before being put into the cold porridge, or the toxic protein has long been inactive. If he understands these poisons, why bother so much? Obviously, this is also a forgery by someone else. Moreover, everyone seems to be able to feel the underground relationship between Wang Shufen and Lu Hai. It's just that you're not sure. And I dare! Between the two of them, the name is intimate, and it is difficult to change it for a while. The eyes of each other are even more embarrassed. Of course, with all this, I don't dare to conclude their relationship. I asked the technical department to check the call records of the deceased, Wang Shufen and Lu Hai. On the surface, Wang Shufen also had occasional contact with the deceased. It's only a few calls a month. However, Lu Hai spoke to an unfamiliar local number at least once a day, and each time it lasted less than half an hour. At first, I just thought it was a good friend of Lu Hai, and I didn't pay attention to it. However, Tencent News was sent to my mobile phone that there was a typhoon in the south yesterday. Therefore, even if there is a plane at night, it is impossible for Wang Shufen to take off, let alone to our Panyun City today. After association, I asked the technician to check the owner of the unfamiliar number, which was Wang Shufen. She lives in Panyun City. The two people closest to the deceased were talking in a panic intentionally or unintentionally, obviously trying to cover up something. They may have been involved in the murder, or they may have conspired with it. ”

After Lang Zhijiao finished speaking, he raised his scarred eyebrows and glanced at everyone. But everyone was immersed in the sigh of Lang Zhijiao.

"Team Lang, since this is the case, then let's arrest someone!" Bian Guan said in surprise.

"Xiaobian, are you reckless again...... Learn from Team Lang, you are not a few years old from Team Lang. I didn't hear that it was 'maybe', but it was just a possibility, and there was no evidence yet. Liu Hanbiao said.

"That's it! Border pass, it's not bad to guard the border pass, but it will only dry up. Seeing this, Qin Wan also muttered a few words.

"Dry rack? Hehe, if you don't eat, I guess I don't have the strength to do it. Okay, I'm in for a treat, let's choose a place. Fill your stomach first, and then let's catch the real murderer. ”

"Okay, Team Lang is really sympathetic to the people!"

"I'll lead the way, Team Lang."

……

After speaking, Lang Zhijiao went to a restaurant called "Tofu Roast Goose" with the group.

At the same time, a brown sedan quietly arrived and stopped on the opposite road, but no one got out of the car for a long time. In front of the car, there was a relatively large western restaurant, and a man with short hair with a sturdy physique also walked in at the same time as the car stopped.