Not long after Xu Lang called Liao Yi over to help, Fan Yang also came back after investigating the scene.

"What are the results of the site investigation?" Xu Lang asked.

After Fan Yang put down the toolbox, he picked up a cup of tea on the table that was already cold, and drank it in a big gulp.

After drinking, he raised his hand and wiped the corners of his mouth casually, and then said: "Although the circuit of the bathroom switch has been burned by high temperature, there are still a lot of traces, according to the investigation results, the line has indeed been touched by people, as long as a person touches the switch, it will be instantly electrocuted, and the strong current will instantly pass through the human body, causing its death." ”

"Did you collect fingerprints at the scene?" Xu Lang asked.

Fan Yang shook his head helplessly and said, "When the murderer committed the crime, he wore gloves and did not leave any fingerprints at the scene. ”

"What about shoe prints?"

"The scene was damaged, and only half of the shoe prints were collected."

"Half a shoe print?" Xu Lang looked at Fan Yang in surprise.

Fan Yang nodded and said: "Yes, there is only half of it, it is left by rubber shoes, although there is only half of it, but according to the pattern comparison of the shoe prints, it is exactly the same as the one left by Nie Fang's family at the scene." ”

"The man in black again?" Xu Lang frowned.

Fan Yang knew what Xu Lang was thinking, and she nodded.

Xu Lang fell into deep thought, at the crime scene of Nie Fang's case, the seventh group of shoe prints was found, and the owner of this group of shoe prints has not been found until now, and Tang Zhiyong's murder scene also found shoe prints with the same pattern? Could it be a coincidence?

Xu Lang shook his head, feeling impossible, whether it was Nie Fang's villa or Tang Zhiyong's house, they were all places where rich people lived, and the people who came in and out of their homes were either rich or expensive, and it was unlikely that such cheap shoes would appear, could it be a worker?

Xu Lang shook his head again, the shoe prints that appeared in Nie Fang's house, if it were said that the workers in his mechanical processing factory left, barely made sense, after all, the people who work in the factory generally wear relatively cheap shoes, but, it stands to reason that it is impossible for the workers in the factory to know where their boss lives, and even if they do, they can't get in, not to mention, Tang Zhiyong is the senior leader of Fuyuan Group, and the people he knows are not ordinary workers, and it is impossible for him to let people wear such cheap shoes. Enter his room.

This is not that Xu Lang discriminates against those who wear cheap shoes, but that everyone's social circle is determined by their share and status.

"Who the hell is this man in black?" Ding Haoqiong asked on the side.

Yes, who the hell is this man in black? He once appeared at the scene of the two murders of Nie Fang and Bu Pengfu, if the seventh set of shoe prints of Nie Fang's family was left by this man in black, then Tang Zhiyong's shoe prints should also be left by him, but Bu Pengfu's family did not find these shoe prints, why is this?

There have been three homicides in a row, and it seems that each of them was killed by suicide or accidentally.

Nie Fang committed suicide by climbing into the crematorium, Bu Pengfu committed suicide with strong sulfuric acid, and Tang Zhiyong was electrocuted, it seems that their deaths are not like murder, however, the cause of Bu Pengfu's death has been determined, he was choked to death by his own vomit, his body was corroded by strong sulfuric acid after death, and the suicide scene was faked, and Tang Zhiyong's case, although he died of accidental electrocution, however, the wiring of the switch was tampered with, it is obvious that this is a long-planned murder, so, Did Nie Fang commit suicide? Or was it murdered? Could it be that the cause of Nie Fang's death was the same as Xu Lang's previous assumption? Xu Lang wasn't sure.

Xu Lang told Ding Haoqiong what he thought in his heart, and after Ding Haoqiong listened, he covered his fist with one hand, put it to his mouth, frowned, thought about it, and said, "Have you found a problem?" ”

"What's the problem?" Xu Lang asked.

"From the time Nie Fang's case occurred to the present, our investigation results show that Nie Fang's case is completely like he is unable to repay because he owes a huge amount of foreign debts outside, and in the end, he chose to drag his children and wife to die together, as if he was preparing to commit suicide." Ding Haoqiong said.

Xu Lang and they nodded, indeed, until now, Nie Fang's case is still unqualified, and there are many doubts that cannot be explained.

"However, in Bu Pengfu's case, not long after the incident, we figured out the cause of the other party's death, and knew that Bu Pengfu died accidentally, and the murderer faked the fake scene of Bu Pengfu's suicide after his death."

"Tang Zhiyong's case, only a few hours have passed since the incident, and we know that he did not die accidentally, but was deliberately murdered, don't you think it's strange?"

After listening to Ding Haoqiong's words, Xu Lang frowned, looked at Ding Haoqiong and asked, "What do you want to say?" ”

"Have you noticed that the murderer's modus operandi is gradually degrading?" Ding Haoqiong looked at Xu Lang and said.

"Deterioration of modus operandi?"

Xu Lang groaned.

After Ding Haoqiong's question, Xu Lang also discovered this problem, from Nie Fang picking up the suicide case that seemed to be perfect, to Bu Pengfu's suicide case, and then to the current Tang Zhiyong accidental death case, as the frequency of the case is getting faster and faster, the murderer's modus operandi is not only not becoming more and more proficient, but is gradually degrading.

If it is said that Bu Pengfu's case was because Bu Pengfu was choked to death by his own vomit, which was an accidental death, and this result disrupted the murderer's crime plan, then, when he went to Bu Pengfu's house, Bu Pengfu should have died, since the other party was dead, there was no need for him to fake the illusion that Bu Pengfu committed suicide with strong sulfuric acid, first, the other party was dead, he didn't need to do it at all, and second, the more the murderer did, the more clues left at the scene.

However, the murderer still chose to do this, why is that? Everything that every murderer does at the scene has a purpose, so what is the purpose of the murderer who faked the scene of Bu Pengfu's murder?

There are only two possibilities.

First, the murderer and Bu Pengfu have a deep hatred, and he did this completely to vent his anger.

Second, it deliberately falsified the scene, interfered with the police's thinking on handling the case, and brought the police into trouble.

Xu Lang thought of these two possibilities, and felt that there might be both of these possibilities, since the murderer chose such cruel means when he killed Nie Fang, and if Bu Pengfu did not die accidentally, he might be in a deep coma when he was alive, and was put into strong sulfuric acid by the murderer, and died of corrosion by strong sulfuric acid little by little, if it wasn't for the fact that strong sulfuric acid could not completely corrode the human body, if it wasn't for the forensic doctor who found vomit in the trachea of the deceased Bu Pengfu that was not completely corroded, then, Maybe Bu Pengfu's death will really make the police think that Bu Pengfu committed suicide with strong sulfuric acid, if this is really the case, then the murderer's purpose has been achieved.

If the murderer's plan to kill Bu Pengfu is the same as Xu Lang guessed, then what about Tang Zhiyong's case?

Compared with Nie Fang, who was burned to death in the crematorium, and Bu Pengfu, who was corroded and died little by little in strong sulfuric acid, it seems that Tang Zhiyong's death is too simple.

Electrocution to death, although it will also experience a lot of pain before death, but, in the strong current, the pain suffered by the human body is actually very short, less than three minutes, people will die, compared to Nie Fang and Bu Pengfu, the murderer when killing Tang Zhiyong, the method seems to be too rough, although the murderer did not leave fingerprints at the scene, but the scene not only left shoe prints, but also left the line was made of hands and feet This fatal flaw, which makes the experienced criminal police know what is going on at a glance.

Judging from the cases of Nie Jihua and Bu Pengfu, the murderer is a person with a strong sense of anti-reconnaissance, his thinking is very agile, and his modus operandi is very cruel. Is it a parody crime?

Xu Lang said his thoughts, and after Ding Haoqiong listened, he shook his head and said: "It shouldn't be a crime of imitation, whether it is Nie Fang's case or Bu Pengfu's case, we have not disclosed the details to the media, and there should be very few people who know that these two people died, and it is impossible for there to be an imitation crime so soon." ”

Xu Lang shook his head and glanced at Ding Haoqiong, and then, Xu Lang thought of a possibility, could it be that the murderer of Nie Fangbu Pengfu and the murderer of Tang Zhiyong were not the same person?

When Xu Lang raised this question, Ding Haoqiong was stunned, and he didn't dare to draw conclusions easily.

After a few people, after being silent for a while, Ding Haoqiong looked at Xu Lang and suddenly asked, "By the way, how do you know that the next person to be killed is Tang Zhiyong?" ”

Hearing Ding Haoqiong ask, Xu Lang simply said the assumption that he was about to say just now, but didn't say it.

After listening to Xu Lang's hypothesis, several people showed incredulous expressions, and they all felt that Xu Lang's hypothesis was too bold and incredible.

Fan Yang said: "Team leader, this is unlikely, right? ”

Xu Lang hadn't spoken yet, but Ding Haoqiong frowned and said, "It's not that there is no such possibility, perhaps, this assumption of the team leader is the assumption closest to the truth, isn't Tang Zhiyong dead?" ”

Indeed, whether it is Nie Fang, Bu Pengfu, or Tang Zhiyong, who died not long ago, it seems that they are all related to the bankruptcy of Zhou Yuanjia's company and his suicide twelve years ago.

"Now that Nie Fangbu Pengfu and Tang Zhiyong are dead, if it is really the same as the team leader's assumption, then won't the next victim be Tang Chundong? Where is she? Fan Yang asked.

Xu Lang turned his head, nodded towards the No. 1 interrogation room, and said, "It's inside." ”

"So what's next?" Fan Yang asked subconsciously.

Xu Lang thought for a while and said: "Continue to look for Nie Wenxing, if he really doesn't die, then, he must know something, find him, you may know the truth about Nie Wenxing." ”

Fan Yang nodded, then looked at Xu Lang and asked, "However, even if you find Nie Wenxing, you can only find the truth about Nie Wenxing, what about the case of Bu Pengfu and Tang Zhiyong?" ”

Hearing Fan Yang ask, Xu Lang also fell silent.

Suddenly, Xu Lang remembered one thing, he remembered the casino opened by Brother Hua that Fat Boy had mentioned, he remembered that Lu Xing once said that this casino was opened by a foreigner named Jack and Zhou Yuxue, Nie Fang had been to this casino before his death, since he couldn't find any other breakthrough now, could he start from the casino?

Thinking of this, Xu Lang looked at Fan Yang and asked, "By the way, where is Du Ziqiao of the second criminal investigation team now?" ”

"After he surveyed the scene with us, he went to the Public Security Bureau, what's wrong?" Fan Yang looked at Xu Lang puzzled.

Xu Lang did not answer Fan Yang's question, but directly dialed Tian Yongchun's phone.

"Hey, Tian Bureau, I need your help."

"How to help, you just say it."

"Notify the Criminal Investigation Team 1 and the Criminal Investigation Team 2, as well as the Criminal Investigation Detachment in the north of the city, to conduct a surprise inspection of an underground casino in the north of the city."

Tian Yongchun was silent on the other end of the phone for a moment, and then said: "The casino is related to the case that your CSY is solving now?" ”

"Yes."

"Alright, I'll inform them to assist you CSY."

After Xu Lang hung up the phone, he said to Ding Haoqiong Luo Jiayan: "You come with me to the scene." ”

Then, Xu Lang turned his head to Fan Yang and said, "You stay in CSY, show Tang Chundong to me, don't let her leave here." ”

Fan Yang nodded.

After Xu Lang arranged the task, he took the firearm and left CSY with Ding Haoqiong and Luo Jiayan.

————

Just as Xu Lang and the others walked out of CSY, Xu Lang saw a woman walking towards CSY with a large bag of things.

After Xu Lang and Ding Haoqiong saw this woman, they were stunned for a moment, this woman, Xu Lang and Ding Haoqiong knew each other and met once, she was Tang Chundong's personal secretary Chen Huan.

After Chen Huan saw Xu Lang and Ding Haoqiong, he walked a few steps quickly, came to them, and asked with a smile, "Officer Xu, Officer Ding, hello." ”

"What are you doing here at such a late hour?" Xu Lang looked at the big bag of food that Chen Huan was carrying in his hand, and asked with a frown.

"Oh, that's right, I just received a call from our general manager Tang, she said she was in your CSY, didn't eat dinner, and was hungry, let me bring her something." Chen Huan explained with a smile.

Xu Lang stared at Chen Huan for a while, then nodded and said, "Then you can go in." ”

"Thank you, Officer Xu."

Chen Huan nodded hurriedly and said with a smile.

Xu Lang waved his hand, he was going to meet the people in the underground casino for a while, and he wanted to meet Deng Feizhang, who was nicknamed Brother Hua, and he didn't care about Chen Huan, who suddenly visited.

After Xu Lang and the three of them left CSY, Xu Lang came to the side of the car and sat in the driver's seat, while Ding Haoqiong sat in the co-pilot, as for Luo Jiayan, she did not get into the car, she chose to ride her own motorcycle, when she came out, Xu Lang had already told them the address of the casino, by the way, Xu Lang also told Du Ziqiao and the first criminal investigation team and the captain of the Chengbei criminal investigation detachment through mobile phone text messages, so that they could get ready.

After getting in the car, Xu Lang and the others left CSY and headed towards the Chengbei Casino.

————

Chen Huan was carrying a big bag of food, and after watching Xu Lang and them drive away, her bright eyes narrowed slightly, not knowing what she was thinking.

When Xu Lang and the others were completely far away, she walked into CSY with her things.

After Chen Huan entered CSY, she found Fan Yang and briefly told Fan Yang the purpose of her coming to CSY.

Fan Yang learned that Chen Huan had Xu Lang's permission, so he took her to the No. 1 interrogation room, after all, Tang Chundong is not a criminal suspect, she is now the target of the police's key protection, and Chen Huan is her personal secretary, so naturally she will not embarrass the other party.

Fan Yang took Chen Huan to the No. 1 interrogation room, and after explaining a few words, she returned to her desk and continued to work.

After Chen Huan walked into the inquiry room, he put the food in front of Tang Chundong.

After Tang Chundong saw Chen Huan, he frowned a little unhappily and said, "Why did you come?" I'm dying of hunger. ”

"I'm sorry, Mr. Tang, there is a bit of a traffic jam on the road, I come and go, I'm really embarrassed, I ......"

However, without waiting for Chen Huan to finish speaking, Tang Chundong waved his hand impatiently, opened the bag, took out the food and began to eat.

Tang Chundong was already hungry, originally, she thought that she would spend a wonderful and romantic night with Xu Lang tonight, but she didn't expect that after seeing Xu Lang, she was brought here and didn't even eat dinner.

Chen Huan brought Tang Chundong's favorite food, although the things were not very expensive, but they were all very elegant, Tang Chundong ate happily, while Chen Huan stood aside, looking at where Tang Chundong was eating, the corners of his mouth hooked a touch of arc.

————

When Chen Huan walked into the interrogation room, CSY came with two more people, one big and one small, two women to be exact.

It was none other than Ning Yanran, deputy director of the Municipal Public Security Bureau, and Xiao Yueyue, who were carrying a lot of food in their hands.

For Ning Yanran, the members of CSY are no strangers, and Fan Yang hurriedly came over to say hello after seeing Ning Yanran.

"Ning Ju, why are you here?"

Ning Yanran looked around for a week, but she didn't see Xu Lang, she said with some doubts: "I know that you are still working overtime, I guess you haven't eaten dinner, so I will bring you something to eat." ”

"Thank you, Ning Bureau." Fan Yang said with a grin.

Ning Yanran shook her head and didn't say anything.

At this time, Xiao Yueyue raised her head, looked at Fan Yang and asked, "Sister policeman, where is my father?" ”

"You are?" Fan Yang only noticed Xiao Yueyue at this time, so he asked curiously.

"Is this your daughter?" Fan Yang raised his head, looked at Ning Yanran and asked.

Ning Yanran shook her head and said, "No, this is the daughter of your team leader, named Xu Yueyue." ”

"Sister, where's my dad?" Xiao Yueyue asked, still tilting her little head.

Fan Yang squatted down, stretched out his hand, held Xiao Yueyue's arm, and explained, "Your father went out on a mission. ”

"Is it dangerous?" Xiao Yueyue asked worriedly.

"Nope." Fan Yang said with a smile.

"Oh."

"How old are you?"

"Six years old."

"Did you go to school?"

"Went to school......

It's just that before Xiao Yueyue's words were finished, there was a sudden sound of something falling to the ground in the No. 1 interrogation room, and then there was a woman's heart-rending scream.

"Ah......h