Zheng Yifeng said solemnly: "Team Leader Shang, it's more than three o'clock in the morning, you and Secretary Hai should go to rest first!" Raise your spirits and come for me tomorrow morning. Shang Siqi said secretly: "I don't care, but Hai Xiangpei is old, and when he first spoke, his eyelids drooped." Shang Siqi thought of this, so she nodded yes.

After a long time, in the Public Security Bureau, Captain Tian said to Zheng Yifeng: "The items that are slightly related to the case are all in this bag." Zheng Yifeng took the bag into his hand and opened it to take a look. Then, he said to Captain Tian: "You take me to meet the interrogation team of the Provincial Commission for Discipline Inspection who was on duty at the time of the incident, I have something to ask them." Captain Tian said suspiciously: "Because the food was bought by the members of the life group, we focused on the members of the life group. Zheng Yifeng said: "The murderer may have taken advantage of this to make you mistakenly think that the person who drugged was a member of the life group." ”

In the police office, Zheng Yifeng asked a member of the interrogation team named Shi Yanzheng: "Before Li Fuchao died, were you on duty?" Shi Yanzheng said: "Yes! Zheng Yifeng said: "You can describe the situation again." Shi Yan said solemnly: "After dinner, I changed shifts with Sun Yuzhong, and during this period, the other members of the interrogation team did not have any abnormal behavior. Zheng Yifeng asked, "What about Li Fuchao?" How did he behave at the time? Shi Yanzheng pondered for a moment, and he said: "He asked Sun Yuzhong for coffee, and Sun Yuzhong gave him a cup of coffee, but Li Fuchao said that a cup could not solve the difficulty." So, Li Fuchao drank three cups of coffee in a row. Zheng Yifeng secretly thought: "There should be no problem with the coffee, if there is a problem, the forensic doctor will definitely be able to check it out." ”

Zheng Yifeng said sharply: "Who of you is Sun Yuzhong?" As soon as the words fell, I saw a man with a white face like jade and said, "I am!" After Sun Yuzhong and I changed shifts, I ate, ate, leaned back in my chair, fell asleep in a daze, and did not wake up until dawn. As soon as I opened my eyes, a bad premonition arose, and I hurried to the interrogation room, but it was too late, Shi Yan was asleep on the table, and Li Fuchao, who was sitting opposite him, had his arms drooping, his eyes open, and his pupils dilated. I ran up to him and ran my hand to his pulse, only to find out that he was already dead. At that time, I hurriedly woke up Shi Yanzheng and called the police. Then, we found that the whole group members on the top floor were basically in the same situation as the two of us, all of them fell asleep after eating. ”

Zheng Yifeng asked: "Do you remember what suspicious objects were in the interrogation room at that time?" Sun Yuzhong thought for a while, and then he said: "In the interrogation room, there is a large rectangular table, on which are placed paper and pens, hot water bottles, and lamps. Zheng Yifeng asked, "Is there only these things?" Sun Yuzhong nodded yes. Zheng Yifeng said: "Then what is this? As he spoke, he pulled out a wall clock from his bag. Sun Yuzhong looked at it and said, "This is indeed the clock hanging on the wall of the interrogation room, I forgot it for a while. Zheng Yifeng sneered: "Don't pretend! You're the murderer! Sun Yuzhong said in surprise: "Secretary Zheng, I'm not!" ”

Suddenly, Zheng Yifeng pointed at Shi Yanzheng with the ring finger of his right hand, and said sharply: "I'm talking about him!" Shi Yanzheng said in surprise: "Secretary Zheng! Don't talk nonsense! I was asleep at the time, how could I kill someone in my dreams! Zheng Yifeng said disdainfully: "Don't quibble!" The truth is in your face! Just now, when I took out the wall clock and questioned Sun Yuzhong, your right hand rubbed back and forth on your thigh a few times. What are you nervous about? Then, when I said that Sun Yuzhong was the murderer, your cheeks were raised and wrinkled, the corners of your mouth were slightly upturned, and your eyelids were contracted, which was a happy reaction. What's more, the surprised reaction on your face is more than a second, why are you pretending? Shi Yanzheng said calmly: "I don't understand what you're saying." Zheng Yifeng sneered: "If you weren't the real murderer, your expression by now should be a tight forehead, drooping eyebrows, and tightly closed lips." And you are so calm! Why do you want to kill ......" Without waiting for Zheng Yifeng to finish speaking, Shi Yanzheng turned around and ran.

As soon as Shi Yan took a step, his body couldn't move. He only felt like he was carrying a copper tripod on his right shoulder. In the blink of an eye, his body collapsed to the ground. Captain Tian, who was standing on the side, hurriedly ran to Shi Yanzheng's side and grabbed him. Captain Tian was secretly surprised: "This Secretary Zheng's legs are fast, and with only one right hand, he pressed him down, and he hid it deeply!" ”

The next day, after the police initially interrogated Shi Yanzheng, Zheng Yifeng learned that after Shi Yanzheng was infected with drugs, he used all his belongings to smoke white powder, and then he had no money, so he had to borrow from friends and classmates, and panicked to do business. Last month, his bank account suddenly increased by 200,000 yuan, and he was overjoyed to withdraw the money. But there is no such thing as pie in the sky!! Last week, he received a call from a stranger, who threatened Shi Yanzheng that if he did not do what he was told, he would pass on Shi Yanzheng's drug use to the unit. If he was dispatched, he would call 300,000 yuan to Shi Yanzheng's bank account afterwards. Shi Yanzheng felt that he had no way out, and as soon as he thought that he could get another 300,000 yuan afterwards, he gritted his teeth and agreed to him.

Just the day before "Shuanggui" Li Fuchao, the man called Shi Yanzheng again and told him to press the yellow button on the back of the wall clock in the interrogation room, and take the opportunity to put sleeping pills into the meal. At that time, Shi Yanzheng asked the man in confusion, and the man threatened Shi Yanzheng that if he asked more, he would shake out the matter of his drug use. So, Shi Yanzheng did as the man said helplessly. What he never expected was that his understatement would ruin Li Fuchao's life. The wall clock is a murderous mechanism, on the surface of the wall clock, there are seven small, unrecognizable holes with the naked eye, and there is a high-level program circuit board in it, which writes the specific information of Li Fuchao, Shi Yan is pressing the yellow button, it is to start the mechanism and program in the clock, after it is activated, the clock will shoot seven colorless and tasteless "ice needles" from the seven holes to Li Fuchao's seven dead holes.

When Shang Siqi and Hai Xiangpei came to the police station, Zheng Yifeng was sleeping on a desk. Captain Tian told the two of them the details of the case. Shang Siqi said: "Shi Yanzheng is just a puppet, the real mastermind behind the scenes, I don't know who it is!" ”