"Do you really know this pattern?" Wang Shen looked at Xu Xiaolin with suspicious eyes.

"Of course." Xu Xiaolin answered Wang Shen's words, and at the same time spread out her palm to Wang Shen, and motioned for Wang Shen to show her the banknotes in his hand.

"Give her a pair of gloves." Wang Shen commanded the police beside him.

Xu Xiaolin took the plastic gloves and put them on her hands, and took the banknote from Wang Shen's hand. Xu Xiaolin held the banknote high. When the sun shines on the banknote, the lines on it become more obvious. Xu Xiaolin didn't look at it for long, and returned the note to Wang Shen.

"I already know what this pattern is." Xu Xiaolin looked at Wang Shen with confidence, and smiled proudly.

"Oh? Are you sure? Wang Shen really didn't know why Xu Xiaolin was familiar with this pattern.

"You still don't believe me." Xu Xiaolin's face was full of innocence and sighed. "But it's okay, when I'm done, you can go and check it. You're right, this pattern is the pattern of the sole. And this texture comes from the haute couture products of a certain luxury brand. ”

"How do you know this?" Wang Shen looked at Xu Xiaolin with a surprised face.

"Officer Wang, how can I say that I am also a well-known writer, and I am also a woman. So, I'm more concerned about luxury. This pattern is from a luxury brand's new collection this summer, and it's a high-end model, which is worth a lot of money. Xu Xiaolin makes no secret of her love for luxury. However, Xu Xiaolin's income can indeed support her consumption.

"In this case, you can start with the shoes of this brand and find the relevant purchase history." Wang Shen muttered quietly.

"The brand's haute couture products are available in limited quantities. The store keeps the details of the customers who bought the product. Moreover, since it is sold in limited quantities, the number of people who buy it should not be too large, and you should be able to get the results you want by going to the store and checking it. ”

"You're really clear about the management of such a brand."

"Of course." Xu Xiaolin smiled proudly again. "You see, you don't want me to help solve the case, and I didn't help this time."

"Okay, I have the opportunity to invite you to dinner, and I will repay you."

"Captain Wang, I have taken your words to heart. Okay, I still have something to do, let's withdraw first, you can check slowly. After Xu Xiaolin finished speaking, she disappeared into the crowd in a dashing manner.

The noisy atmosphere at the murder scene gradually subsided. Liang Li's body was transported away pending further autopsy. Wang Shen went to the luxury store according to the clues provided by Xu Xiaolin. The employees of the luxury store knew Wang Shen's identity and were very cooperative with the police. It didn't take long for the staff of the luxury store to provide the police with all the information of all the customers who had purchased the shoes. Wang Shen didn't have time to carefully study the list of customers, but drove all the way back to the police station.

The surveillance records that Wang Shen requested had been sent to his mailbox. Wang Shen downloaded the monitoring records to his computer. Taking advantage of this gap, Wang Shen looked through the purchase records at hand. One unfamiliar name after another skipped in front of Wang Shen's eyes. Suddenly, a slightly familiar name pierced Wang Shen's line of sight.

Song Mu? The name seems somewhat familiar. Wang Shen recalled everything about the name. Wang Shen suddenly woke up, Song Mu was not the psychological counselor when Han Mo was alive. By the way, if it weren't for San's traffic accident. Wang Shen's original purpose that day was to visit the psychological counselor. Wang Shen suddenly thought that he seemed to have checked the file of this psychological counselor before. Wang Shen immediately turned on his computer and found it, it was this photo. Judging from the photos, Song Muguo is really an elegant man.

Wang Shen clicked on the surveillance video and searched for the suspicious characters in the video at double speed. The results of the surveillance were the same as Wang Shen expected, and there were almost no suspicious characters found in the video in the early hours of the morning. But in the rush hour video, a familiar figure appears in the crowd. This person is wearing a mask, but no matter from the face shape or temperament, this person is exactly the same as Song Mu. Wang Shen fell into deep thought again. If this counselor is the murderer of Liang Li, or even the culprit who caused Sang's traffic accident, then what is his motive? It seems that the source of all the recent cases is Han Mo's death. From this point of view, could it be that Song Mu is also trying to help Han Mo take revenge? A psychological counselor should not have such strong feelings for his patients. If a reasonable explanation is found, Wang Shen can only come to one judgment: the relationship between Han Mo and Song Mu is by no means as simple as that between a patient and a doctor.

Through Liang Li's case, I returned to Sang's case again. If Sang's traffic accident was also caused by Song Mu, what was the purpose? By the way, the handsome man who gave the money to San. If this man were Song Mu, everything would make sense. Song Mu bought Sang and asked Sang to testify against Zheng Wu for killing Han Shuang. But Song Mu didn't want his identity to be exposed, so he designed to kill Sang. Because when Song Mu and Sang were trading, they happened to be bumped into by Liang Li. In order to prevent Liang Li from revealing clues about herself to the police, Song Mucai killed Liang Li.

In order to confirm his suspicions, Wang Shen picked up the phone again, and according to Sang's call records, Wang Shen retrieved surveillance video near several of the public telephone halls. Because the talk time of the payphone is recorded with exceptional accuracy, the surveillance video retrieval is very targeted. Wang Shen's eyes were fixed on the man in the video. Sure enough, it was the same man who used the payphone to call Sang back several times. The man was wearing a hat and a mask, and his face was not visible from the surveillance at all. But in terms of body type, it is very close to Song Mu.

But how did Song Mu cause Sang's traffic accident? Wang Shen left the police station and returned to the location of Sang's traffic accident. Wang Shen stood under the convex lens and carefully observed the convex lens. Wang Shen took out the flashlight that had been prepared long ago from his pocket, observed the surrounding road conditions, and after confirming that it was safe, he turned on the flashlight against the convex lens. Wang Shen blinked, the light reflected from the convex lens was indeed quite dazzling. Wang Shen only uses an ordinary small flashlight. But what if you change it to a flashlight, what will the result be?

Where did the killer create the bright light? On the street? Unlikely. If someone is on the street with a strong flashlight shining a prominent lens, it will definitely arouse the suspicion of others. Where is it? Wang Shen frowned, and began to take himself as the center of the circle, and rotated in a circle, carefully observing the surrounding environment. After a complete rotation, Wang Shen's eyes lit up. Wang Shen was pleasantly surprised to find that across the street, directly opposite the convex lens, there was a large signboard that read "Dr. Song's Psychological Clinic". The window of the clinic is facing the convex lens, which is only twenty or thirty meters away. The location is quite good, taking advantage of the time and location.

Wang Shen rearranged the murderer's thoughts on causing a traffic accident in his mind. There are several elements that are indispensable in order to create this seemingly unexpected traffic accident. First, the murderer must be familiar with the fact that this intersection is an accident-prone area. And there are only two kinds of people who know about this situation, the traffic police and those who often haunt the neighborhood. The psychological clinic is here, and Song Mu is naturally very familiar with the situation at this intersection. Second, this intersection is the usual route of the freight company, and the murderer must know the approximate time when the truck passes through this intersection. For this, even the traffic police will not notice. The only people who can notice this are the regular residents of the neighborhood. Third, when you master the above two points, it is relatively simple to cause unexpected traffic accidents. The murderer only needs to calculate the approximate time for the truck to pass through this intersection, and then lead the victim to this intersection, design a time for the victim to cross the road, and then use a strong flashlight to interfere with the driver's line of sight. This makes for a perfect traffic accident case. The whole case seems to be too perfectly designed, but it makes sense. It's just that this murderer is really a rare "delicate" person.

Now that he has figured everything out, it's time for Wang Shen to visit this Doctor Song. Wang Shen glanced at the signboard of the psychological clinic and walked in the direction of the psychological clinic.

"Hello, do you have an appointment?" As soon as Wang Shen walked into the psychological clinic, Song Mu's secretary greeted him.

"I'm a friend of Dr. Song, and I'll come to him for dinner after work." Wang Shen's level of fabricating lies can be said to be excellent.

"Huh? That's right. But Dr. Song is not in the office now. The secretary looked at Wang Shen apologetically.

"How so?" Wang Shen deliberately showed a very surprised look. "Yesterday I made an appointment with him to have dinner with him today."

After listening to Wang Shen's words, the secretary laughed. "It may be that Dr. Song stayed up late to work last night, so he is too tired now."

"Staying up late at work?" Wang Shen still deliberately showed a surprised expression and looked at Song Mu's secretary in front of him.

"Yes, Dr. Song seems to have taken on a tricky patient recently, so he studied the patient's medical records all night yesterday." It can be seen that the secretary admires Song Mu very much. When she mentioned Song Mu, her eyes were full of admiration.

"How do you know that Song Mu was working overtime all night last night?"

"Because, I was there yesterday." After saying this, the secretary's cheeks flushed, and he lowered his head embarrassedly.

"Have you been with him all night?" Wang Shen once again showed a surprised expression.

"Let's just say that I didn't leave until the early hours of the morning and went home for a little rest." The flush on the secretary's face became heavier.

"At work, he's still working so hard." Wang Shen showed that he knew Song Mu very well. However, Wang Shen muttered in his heart, if the secretary's words were true, then all previous assumptions would have to be overturned. No, through monitoring, Wang Shen can determine that Song Mu must have been to the scene of the murder. What went wrong? "Have you ever entered Song Mu's office at night?"

"Huh?" The secretary was obviously puzzled by the question raised by Wang Shen. However, the secretary shook his head anyway.