Chen Fan still didn't understand, so I pointed to a surveillance camera on a telephone pole on the side of the road and asked him to go to the police station to call up the surveillance video of those three days. There are almost no surveillance cameras in this area, except for crowded places. Luckily, because the street is so crowded, a surveillance camera was installed on the pole.

Chen Fan realized something, didn't have time to ask more, and immediately ran towards the police station. Chaoyangji's guy was completely impatient, and I didn't let him stay longer, and just let him go back. Luo Feng asked me if I suspected that someone was in this neighborhood, taking advantage of the crowds, and replaced the money in the pockets of the guy and the boss.

I nodded, Luo Feng felt a little incredible: "The boss and guys of Chaoyang Ji won't be so stupid, they have been exchanged for money three times in a row, and they haven't found out yet?" ”

I frowned and said that I would take a look at it when Chen Fan took out the surveillance video. After waiting for about an hour, Chen Fan finally ran back sweating profusely. Luo Feng complained about how Chen Fan had been gone for so long, Chen Fan said that because he had made a big statement in the police station before, most of the police officers were very disgusted with him, and it was not easy to take out the surveillance video.

We didn't waste any time, we immediately found a video store and played the surveillance footage at that time. The surveillance cameras are old-fashioned, the picture is not particularly clear, and there are stutters from time to time. On the streets, there are dense human heads, which makes it even more difficult to see.

We maxed out the surveillance footage, and we watched more closely when it was time for the guy to deliver the food on the first day. Sure enough, we saw a man pushing a bicycle across the road, and we couldn't see his face clearly, but looking at his clothes and the way he looked at his bicycle, we could confirm that he was the guy who delivered food from Chaoyang Ji.

When the food was delivered, nothing unusual was found, and about half an hour later, the guy who delivered the food pushed the cart back again. This time, we slowed down the surveillance footage because there were so many people that we could barely see the head of the food delivery guy. After closer inspection, we still didn't find any strange clues.

We broadcast the surveillance footage from the next two days on the other two machines. In this comparison, we finally found some clues.

There are three days in total, the first two days are meals delivered by the guys, and the next day is the meals delivered by the boss. They all passed through the crowded street, and, because there were so many people, they all walked in carts. Every day, on their return journey, we found a man with an inch in his head, very close to them.

The picture is too blurry, and there is no way to directly identify whether the person walking next to them is the same or not. On the surface, this is not surprising, because the surveillance cameras only captured their heads, and the entire crowd below them was blocked.

The man, who had been following the guy and the boss, only separated when they walked out of the crowded area. Soon, they all disappeared from the visual range of the surveillance cameras. However, on the last day, when the guy who was sticking to the boss and his buddies was about to leave the surveillance camera viewing area, I noticed one of his movements: he raised his hand and wiped it on his forehead.

Luo Feng asked me what was strange about this action, I thought about it, and told Luo Feng that people's actions can often reflect a person's heart, which is also a classic view of criminal psychology. As I spoke, I pointed to Chen Fan, who was pinching his chin and thinking, and said that Chen Fan pinched his chin, indicating that he was in thought.

Raising your hand and brushing it on your forehead may be a sign of relaxation. And, I noticed that this person only did this action on the last day, and it is likely that he thought that everything had been done, so the nerves that had been tense relaxed so he inadvertently did this action.

"It's not absolute, either." Chen Fan is a policeman after all, and he also has some research on criminal psychology: "Perhaps, he just felt hot and wiped his sweat?" You see, after he wiped his forehead, he shook his hand, which was clearly sweating. ”

Chen Fan said, and replayed the picture.

I smiled slightly: "Action and psychology have never been necessarily related, everything is just subjective speculation." But there are many subjective performances, strung together, it becomes the key to solving the case, as a policeman, don't you still understand this truth? ”

With the development of criminal science technology, objective evidence is becoming more and more important, but after all, criminal science technology is limited, and subjective evidence and reasoning still occupy an important position. Chen Fan didn't quite understand it yet, so I only asked him rhetorically: "On such a cold day, if it weren't for strenuous exercise, might you sweat to the point where you need to wipe your forehead with your hands and shake it off?" ”

Chen Fan finally reacted: "You mean, this person is the suspect, he is sweating because after he took the meal, he ran to catch up with the guy and the boss, and then replaced the money in their pockets?" ”

"It's just speculation." I said, "Accuracy is not guaranteed. However, the three times the food was delivered, it was all noon. ”

Most of the people in that residential area are migrant workers, and they either go back in the evening or at noon, because they are too tired and are taking a lunch break. Assuming that the suspect immediately goes out of the house and downstairs after receiving the meal, the possibility of being discovered is very small, and if he pretends to be casual, even if he is seen, others will not pay attention, and the police will naturally not ask anything if they ask later.

It's entirely possible to get out of the residential area, take a shortcut, and catch up with the guy and the boss.

Luo Feng's brows were also frowning tightly, and he asked me how sure I was, and I shook my head, emphasizing once again that this was just my speculation. Luo Feng still couldn't believe it, because although there were many people in that block, the street was very narrow, and the person who looked like an inch had only walked with the guy and the boss for only five seconds.

In five seconds, you need to open the zipper of the person's fanny pack, pull out a piece of money inside, stuff the pre-prepared paper into it, and finally close the zipper of the fanny bag, which is too difficult. They were still walking, and that person had to promise not to be discovered by anyone else, Luo Feng really couldn't think of anyone who could do it, even if it was some thieves and pickpockets, they might not be able to do it.

That's what bothers me. I thought of Fat Ji, and there was an inexplicable extra coin in Fei Ji's pocket, and when Fei Ji was still alive, I tried to carefully put a dead coin into Fei Ji's pocket, but it was immediately discovered by Fei Ji.

We thought about it for a long time, but we didn't figure it out.

Time passed very quickly, and by the time we came out of the video shop, it was almost dark. Chen Fan sighed and lit a cigarette. He was upset and said that if there was no way to solve the case within the expected time, he would no longer have the face to be a police officer.

Everyone was tired, and when they got back to the hotel, everyone went to sleep. I was lying on the bed, the little ghost was lying next to me, when I was in a daze, the phone in the hotel rang, I picked it up and listened, it was the waiter at the front desk who called, the waiter said that there was a copy of my mail, and asked me to go down to pick it up.

I rolled out of bed and retrieved the mail.

It was a letter, no sender, only my room number. I asked the waiter, and the waiter only said that someone threw it at the front desk, and the person only said that he would give the letter to the guest with the room number, and then left immediately. The waiter described the man's appearance, saying that the man had wrapped himself tightly and was wearing a mask.

I opened the letter, and there was only a piece of stationery and an old photograph inside.

The moment I saw the photo, my heart tightened.

There are two people in the black-and-white photo, one is my dead dad and the other is me. I was very impressed by this photo, which was taken in front of a park with my dad when I was a child. At that time, I was only five or six years old, and my father was relatively young.

The two people in the photo have smiles on their faces, but the smile looks harsh.

I immediately unfolded the folded letterhead, and on the huge letterhead, there was only one line of words: If you want to take revenge, leave the port area immediately, go to Beijing to find me, I can help you, and then stay in the port area, your life is not guaranteed.

Except for this line, the letter is not even signed. I quickly searched my mind for someone who might send me this letter, but after thinking about it for a long time, I didn't think it was. It just so happened that at this time, Luo Feng came to knock on the door, I handed him the letter, and Luo Feng was also shocked after reading it.

He immediately asked me who sent the letter, and I shook my head and said I didn't know.

Luo Feng scolded with some annoyance: "Is this person missing a string in his head, he doesn't even say who he is, how can you find him." ”

Luo Feng's voice woke up the little ghost. Looking at the time, it was already past eleven o'clock in the evening.

Luo Feng asked me if I wanted to leave the port area directly, because this was not the first time that someone asked me to leave the port area, otherwise my life would be in danger. I thought about it, shook my head, and said that it wasn't going to be the last day and a half. Moreover, the origin of this letter is not clear.

"This case must be solved." I said to Luo Feng: "I feel more and more that this case has something to do with the person I am looking for. ”

We waited for a while, and Luo Feng's subordinates finally collected all the two lists. When I got the list, I took a deep breath, and I put all my hopes on this list.

There were two lists, one for the rural village and the other for the secular disciples of Sansongguan, and I took the two lists and looked them up one by one. Luo Feng is very reassuring, on the list, in addition to their names, there are also some basic information about each of them, including their occupations.

Although I already knew the general situation, I was still slightly stunned when I saw the list of secular disciples of the Three Songs, especially their professions.

Each of them is really very successful, and in all walks of life, they are all people with heads and faces.

Finally, I found an overlapping name.

"The murderer, it turned out to be him, so that everything can be explained."