psychochemist

Chapter 37 The disappearing suspect
Police officer Xiao Zhang: "That day, there were four of us, Zhang, Li, Zhao, and Xiao Guo. We were in charge of tracking this suspect. For three consecutive days, we were almost inseparable. He never left our sight. Supermarket, walking, we all followed him, and it was the three of us to complete the mobile tracking task, Guo Na did not participate, because we had received professional training after all, and Guo Na was easily exposed. We were as careful as possible, so we believed that he was Don't notice us."

Yu Fan asked again: "Is there anything unusual in this process? He walked back and forth repeatedly? He suddenly accelerated his running? Or was there any behavior that made you feel that your stalking might be exposed?"

Xiao Li also spoke: "There is nothing unusual, he didn't even stop to look back, he probably didn't notice us."

Yu Fan: "Where is the last place where it disappeared?"

Xiao Zhao: "At his house."

Yu Fan was surprised: "Oh? Did you find his home?" Yu Fan said, he saw a bag of potato chips on the office table out of the corner of his eye, so he opened the potato chips and distributed them to everyone. While eating potato chips, he continued to chat attentively.

Xiao Zhao: "Yes, his house is an ordinary family area without an elevator. There are 7 floors in total. The suspect's house is on the fifth floor. There are only two families on the first floor, and there is only one exit. It is actually very easy to follow. After the suspect went upstairs, we installed a surveillance camera at his door. We just waited to catch the turtle.”

While talking, Xiao Zhao's eyes were full of hope. After following for so many days, he finally saw the hope of capturing it. It seemed that a group of hunters had cornered a wounded wild deer, and they were waiting for this wild deer. Released the last bit of wisdom on his body, and finally caught him with nothing.

Yu Fan: "What next? Disappeared?"

Guo Na said: "Our car is parked downstairs, and we take turns to keep an eye on it. We videotape the whole process of people entering and leaving this building. He hasn't come out for three whole days."

Yu Fan asked again: "What about eating? Takeaway?"

Guo Na: "Well, takeaway, these days we order takeaway, usually at noon, at 6 pm, and at midnight for supper, which makes us all hungry."

Chen Frameyang knocked on the table: "Be serious."

Guo Na stuck out her tongue again in embarrassment: "Then on the fourth day, there was no takeaway, but someone came to turn on and off the lights in the morning and evening. On the fifth day, we felt something was wrong, so we went up and knocked. The door, no response, we broke in and there was no one in the house, I'm pretty sure he didn't come out through the window because I was down there staring at the window."

Yu Fan rested his chin with one hand: "Evaporation? Interesting, can I have a look at your surveillance video?"

Chen Xingyang: "Of course, I actually didn't watch the video a few times, because the time was too tight, so I called you directly. Now every second that passes, we are more disadvantaged."

I thought I could catch a turtle in the urn, but I didn't expect this turtle to be a turtle that can burrow in the ground.This is often the case with people. Those who drown are those who can swim, and those who screw up are always sure things. The wind and waves will be over, but the gutter is the easiest to capsize.

Yu Fan nodded, while distributing potato chips to everyone. It is said that snacks can relieve people's tension.

The Hong Chashi in the video is a dwarf about 1.5 meters tall. In a northern city like XA City, this kind of dwarf is rare, so it is easier to be recognized and tracked.Yu Fan took a closer look at the monitor, and lowered his head with his chin in thought.

Sometimes the most conspicuous is the least conspicuous.

A smile suddenly appeared on the corner of Yu Fan's mouth: "I know how he disappeared."

Everyone was amazed, how did you find out so quickly?
Chen Xingyang also joked: "Old Yu, don't jump to conclusions, but I still want to hear your thoughts."

Yu Fan pointed to the monitor: "Look, every time he ordered takeout, he opened the door ahead of time, and then the little brother who delivered the takeaway came, knocked on the opened door, and then had a few words with the inside, I guess the general content should be 'come in and put the food on the table for me', from the beginning to the end, the suspect did not show up."

Yu Fan paused, glanced at the surprised crowd, and continued: "But don't you think it's strange? We usually order takeaway, shouldn't we wait for the takeaway to come and then knock on the door before opening? How can we open the door in advance? In winter, the door is so cold, and he lives alone, and he himself is a weak person, usually open the door, what if bad people come in, even though he himself is a bad person. Then, on the third day, his The accomplice came over pretending to be a delivery boy, and entered the door in the same way, then put him in a delivery box and took him away. The reason why you saw a light switch on the fourth day should be remote control. Now this kind of smart light It’s everywhere, and this is already a tactic to slow down. The reason why there is no takeaway on the fourth day is because there is no one who can open the door on the fourth day.”

Everyone was dumbfounded. Such an explanation seemed to make sense. Chen Xiangyang asked Yu Fan: "Old Yu, such a big living person, can the takeaway box fit?"

Yu Fan: "The general takeaway box is already 50cmX37cmX37cm in size. He only needs to choose a slightly larger takeaway box, which can completely accommodate a 1.5-meter person. And it is difficult to be noticed."

Guo Na also scratched his head in doubt, trying to remember, and said: "I think it's a bit strange to say this, why did they come into the house to deliver food, but why did we ignore this detail later, this is a mistake."

Yu Fan: "Actually, you all know the law of material exchange. Changes bring about the exchange of matter or energy. Grasping the variable is the key to cracking the code. Just let an outsider look at these evidences, and it is easy to place suspicion on the delivery of food. On my little brother. It's just..."

Chen Jianyang couldn't wait: "Just what? Old Yu, don't be a fool."

Yu Fan said calmly: "You are not outsiders, or you were forcibly drawn into the game by your opponent."

Guo Na blinked his big eyes, wondering: "What do you mean?"

Another smile appeared on the corner of Yu Fan's mouth: "Answer me a question first, did you swallow all the chewing gum I gave you just now?"

Everyone was startled, confused by Yu Fan's nonsensical question, and their thoughts jumped out of the case. Everyone had eaten the chewing gum issued by Yu Fan just now, but everyone searched their mouths with their tongues, and they couldn't find it. I was surprised to find that the chewing gum in my mouth was all——disappeared! ! !

　Often it is the last key that opens the door - rubber plasticizers
　　
　
(End of this chapter)