After Xu Lang and Ning Yanran left the No. 1 interrogation room, they entered the No. 2 interrogation room, and in the No. 2 interrogation room, Xu Lang saw the suspect Yang Xuewen.

Yang Xuewen and Zhu Hongfang are different, first of all, the appearance of the two people is different, Zhu Hongfang is slightly chubby and dark-skinned, while Yang Xuewen is white and fat, which is related to his profession, after all, the people who open restaurants have better food, and the difference in appearance is only one of them.

Second, Zhu Hongfang is an old worker who has worked in a mechanical processing factory for more than 20 years, this is Zhu Hongfang's first job, and it is also the last job so far, Zhu Hongfang has little contact with outsiders in addition to contact with colleagues and leaders in the factory on weekdays, so, relatively speaking, Zhu Hongfang is still relatively simple, and Yang Xuewen is different, he is a restaurant, and the people who go to his restaurant to eat are all kinds, what kind of people have, there are more contacts, and if you want to retain customers, you will naturally say anything, can say anything, and his knowledge is wider than that of ordinary people, so Yang Xuewen's mouth is very capable of speaking.

However, after Yang Xuewen saw Xu Lang and Ning Yanran walk in, he saw Xu Lang sitting in the interrogator's position, while Ning Yanran was sitting next to him, holding a pen and ready to record at any time, he knew that Xu Lang's identity was definitely not ordinary, a few days ago, after he was brought to the Public Security Bureau, he knew Ning Yanran's identity, he was the captain of the second criminal investigation team, and since Xu Lang was able to sit in the position of interrogator, Xu Lang's position must be higher than Ning Yanran's, and it was not difficult for Yang Xuewen to see this.

After Xu Lang sat down, he didn't beat around the bush with Yang Xuewen, he still got straight to the point, and said what he had just said to Zhu Hongfang before saying it to Yang Xuewen, although Xu Lang saw that Yang Xuewen was not a very good character to deal with, but what he didn't expect was that after Xu Lang asked those questions, Yang Xuewen's answer was almost the same as Zhu Hongfang's, and he kept saying that he didn't kill anyone, he was the one Zhu Hongfang killed, and the tone of saying this was the same as Zhu Hongfang, very determined, which made Xu Lang more and more confused.

Next, Xu Lang asked Yang Xuewen to tell in detail what he had experienced before and after the incident, Xu Lang found that Yang Xuewen was not lying, although what Yang Xuewen said this time was not the same as what Ning Yanran said when they interrogated Yang Xuewen last time, but the essence is almost the same, the difference this time is that Yang Xuewen pushed the person who killed Shen Jun to Zhu Hongfang in one force.

Xu Lang is not a fool, Ning Yanran is naturally not either, for Yang Xuewen's little trick, he knows very well in his heart, but he just sees through it and doesn't say it.

After listening to Yang Xuewen's narration, Xu Lang didn't ask any questions, gave Ning Yanran a look, and the two of them didn't say a word, and left the second interrogation room.

After Xu Lang and Ning Yanran walked out of the No. 2 interrogation room, they did not go back to the No. 1 interrogation room, but came to the office area of the second criminal investigation team.

After coming to the office area, Xu Lang casually found an empty chair and sat down, lit a cigarette, Ning Yanran sat next to Xu Lang with the interrogation transcript, watched Xu Lang smoke, and then asked, "Did you find anything suspicious?" ”

Xu Lang didn't speak, just smoked, after the interrogation of Zhu Hongfang and Yang Xuewen, Xu Lang did find a lot of suspicions, and at the same time determined some things.

First of all, Xu Lang determined that whether it was the honest Zhu Hongfang or the somewhat clever Yang Xuewen, neither of them was the murderer who killed Shen Jun, as for why neither of them was a murderer, there are the following reasons.

First, whether it is their own story, or according to the police investigation, it is proved that Zhu Hongfang, Yang Xuewen and the deceased Shen Jun, they did not know each other before they died, even if they all lived near Rainbow Road, if they were in the countryside, living on a street, it was impossible to not know each other, but this is not a rural area, but a city, in the rapid development of the economy now, living on a street, there are many people who don't know each other, and it is normal, no one will kill a person they don't know at all, of course, there are no absolutes in the world, In previous criminal cases, there were some extremely vicious and psychopathic criminals who would kill people they didn't even know, but in this case, neither Zhu Hongfang nor Yang Xuewen had the motive to do so.

Second, Zhu Hongfang is an old worker in a machinery processing factory, with a stable income, as long as the factory does not close down, he can retire after working in the factory for a few more years, even if he retires, he can get a lot of pension, and Zhu Hongfang is almost fifty years old, and he has accumulated a lot of property over the years, there is no need to kill a person with a bad record, he can't do it, the same is true for Yang Xuewen, he has a wife, a restaurant, and children, although the restaurant is not big, But big and small are also a career, and there are hundreds of yuan in the account every day, and there is no need to kill Shen Jun.

The first two points say that they have no motive to kill, so third, according to their confessions, Xu Lang determined the existence of a fourth person at the scene in addition to the three of them, although Xu Lang got the answer from the forensic doctor Ye Xuefei, but got the exact answer from Zhu Hongfang and Yang Xuewen, although this answer has no conclusive evidence to prove, but Xu Lang firmly believes that there is a fourth person at the scene.

There are several reasons why a fourth person was present at the scene.

First, putting aside the deceased Shen Jun, who was the person who sent the note to Zhu Hongfang and Yang Xuewen?

Second, who are the people who stunned Zhu Hongfang and Yang Xuewen?

If the person who delivered the note and the one who stunned them were both the same person, and this person was Shen Jun, then why did he do it? What is the motivation for this? Why did he lock himself up in the barn after doing this?

Third, if the first two things were done by Shen Jun, then who was the one who locked the warehouse from the outside?

The third point is the most important point, and it is also this point that relieves Shen Jun's suspicion of committing the crime.

After confirming that Zhu Hongfang and Yang Xuewen were not the murderers of Shen Jun, and ruled out that the person who sent the note to Zhu Hongfang and Yang Xuewen and stunned them was not Shen Jun, then there must be a fourth person at the scene, so who could this person be? It's not clear for the time being, after confirming these things, Xu Lang still has some doubts in his heart.

First, who was the person who killed Shen Jun? Why did he kill Shen Jun? Why do you have to involve Zhu Hongfang and Yang Xuewen? If this person has a deep grudge against Shen Jun, then he can directly find a place to kill Shen Jun secretly, there is no need to go to great lengths to do so?

Second, according to Zhu Hongfang and Yang Xuewen's account, when they woke up for the first time, they found that they were in the warehouse and were woken up by Shen Jun, and it was Shen Jun who found that the door was locked from the outside, and it was Shen Jun who proposed to lock the door from the inside, and it was Shen Jun who took a brick to defend himself, and this brick was the murder weapon that killed Shen Jun, but according to the memories of Zhu Hongfang and Yang Xuewen, during this period, both of them touched the brick, and Shen Jun did not touch the brick, but when the technical department inspected the brick, The fingerprints of the deceased Shen Jun were found on it, which is very strange.

Third, after Shen Jun locked the door from the inside, he once yelled, saying that someone was going to murder him, so who was going to murder him? But whether it is Zhu Hongfang or Yang Xuewen, it is not clear who wants to murder Shen Jun, which is very strange.

Fourth, Zhu Hongfang and Yang Xuewen recalled that when they knocked on the door of the warehouse, they found that Shen Jun seemed to be wearing gloves on his hands, but it was dark in the warehouse at that time, and they had no lighting tools, so they were not sure, for the warehouse was very dark, this Xu Lang and Ning Yanran could be sure, because Xu Lang had closed the door of the warehouse during the day, it was already more than ten o'clock in the morning, it was almost eleven o'clock, the weather outside was very good, after Xu Lang closed the mountain gate, the light inside was indeed very dark and dark, so, why did Shen Jun wear gloves? Could it be because he forgot to take off his gloves after work? There is a possibility, but the odds are too small.

Fifth, Zhu Hong's two interrogation records mentioned that after they fell asleep for the second time, he once felt that someone had moved his body after he fell asleep, although he was asleep at the time, in a state of half-dreaming and half-awake, but it is certain that someone had moved his body, and the most critical point was that when they slept, they slept with their heads facing the wall and their feet facing the door, but when they were woken up from outside the next day, they found that they were sleeping with their feet facing the wall and their heads facing the door. It was also proved by Yang Xuewen.

The sixth point is that when he was investigating the scene in the morning, Xu Lang found the nails on the wall to the right of the entrance door of the warehouse, and Xu Lang did not find the nails at the scene.

The last point, which also makes Xu Lang feel weird, is that when Zhu Hongfang and Yang Xuewen were found by Liu Maocai and Qin Yumei, they were still in a coma, and they were woken up from the outside by Liu Maocai and Qin Yumei banging on the door, and after they woke up, they immediately ran to the warehouse door, and while answering and responding to the shouts outside, they took off the latch, and the two-way secret room became a one-way secret room, and only the people outside twisted the outside lock, that is, the wire, and the door opened.

Originally, this detail sounded nothing, but Xu Lang always felt weird, as for what was strange, Xu Lang couldn't say it for a while, in short, he just felt strange.

Although Xu Lang can be sure that Shen Jun was not killed by Zhu Hongfang and Yang Xuewen, but who killed Shen Jun, Xu Lang does not know, and the most critical point is that there is no actual evidence to prove that Shen Jun was not killed by Zhu Hongfang and Yang Xuewen, but there is no conclusive evidence to prove that Shen Jun was killed by Zhu Hongfang and Yang Xuewen, although the murder weapon found at the scene has the fingerprints of Zhu Hongfang and Yang Xuewen, and they all have the blood stains of the deceased Shen Jun, But these alone still can't completely prove that Shen Jun was killed by the two of them, or by one of the two of them.

"Xu Lang, Xu Lang..."

Just when Xu Lang was smoking in silence, Ning Yanran, who was sitting on the side, couldn't wait, and called Xu Lang several times.

Xu Lang was interrupted by Ning Yanran's voice, Xu Lang raised his head, looked at Ning Yanran blankly, and asked, "What's wrong?" Something? ”

When Ning Yanran heard this, she looked at Xu Lang with a blank face, Ning Yanran rolled her eyes, and asked angrily, "Did you find any problems?" ”

Xu Lang nodded.

"Then tell me about it." Ning Yanran's eyes lit up, and she hurriedly urged.

Xu Lang didn't sell it, so she told Ning Yanran everything she thought just now, and Ning Yanran nodded frequently after listening, obviously she agreed with Xu Lang's idea.

When Ning Yanran heard Xu Lang say the last suspicious point, she also frowned, feeling that the scene where Liu Maocai and Qin Yumei rescued Zhu Hongfang and Yang Xuewen was strange at that time, at that time, she couldn't say what was strange, and in the end, Xu Lang suddenly thought of something.

Xu Lang snuffed out the cigarette in his hand, looked at Ning Yanran and asked, "If you are Liu Maocai or Qin Yumei, you know that there is a high probability that the person you are looking for is closed in a room, do you knock on the door first to wake up the people inside, or open the door first and then wake up the people inside?" ”

This time it was Ning Yanran's turn to look at Xu Lang blankly, she didn't understand why Xu Lang asked, but she still subconsciously replied: "It must be to open the lock outside the warehouse first, and then wake up the people inside after finding that the door inside the warehouse is locked." ”

"Then why did you do that?" Xu Lang asked.

Ning Yanran pursed her lips and said with some disdain: "Of course it's an instinctive reaction?" Didn't you do that when you encountered such a situation? ”

After listening to Ning Yanran's words, Xu Lang finally understood that he always felt that the scene where Zhu Hongfang and Yang Xuewen were rescued was weird, and now after asking Ning Yanran, he finally understood what was strange, that is, the order of opening the door was wrong, just like Ning Yanran said just now, in this case, most people open the door outside the warehouse first, and find that the door of the warehouse is locked from the inside, so they will knock on the door and call the door, this is the first reaction of people, and it is not like Liu Maocai and Qin Yumei, call the door first, It is a bit unrealistic to wake up the two people who are still asleep inside and then open the door.

Xu Lang figured this out, and Ning Yanran also figured out the truth after Xu Lang asked this question, so the two of them looked at each other and smiled, everything was silent.

However, although what Ning Yanran said was right, this was just her own practice, and she was also a police officer, and her approach might be different from ordinary people, so in order to verify this idea, Xu Lang asked Ning Yanran to find dozens of volunteers and divide them into several groups to do an experiment.

The experiment is actually very simple, prepare a house with only one exit like the warehouse at the murder scene, lock a person inside, lock the door from the inside, and then lock the door from the outside, so that there is a two-way secret room, if only one side is opened, the two-way secret room becomes a one-way secret room, the secret room is still a secret room, the people inside still can't get out, and the people outside can't get in, and then tell the volunteers that there is a person inside who is locked in and needs them to be rescued, but they are not told, In addition to the door being locked on the outside, the door is actually locked on the inside, go and see what they will do in the face of this situation?

The experiment was very simple, and the results of the test were smooth, and all the volunteers, without exception, after being told that there was a person locked inside, their first reaction was to unlock the door first, and after finding that the door was locked from the inside, they called the door and woke up the people inside.

After the experiment was over, Xu Lang asked Ning Yanran to find Zhu Hongfang's wife Qin Yumei and the security captain Liu Mao to come over to inquire about the situation.

Zhu Hongfang's wife, Qin Yumei, came to the Public Security Bureau soon after receiving the notice, but after receiving the call, Liu Maocai told the police that he was on vacation today and only returned to his hometown last night, and he has not returned to S City yet, and if the police want to ask him any questions, he will need to wait until tomorrow.

After learning of this situation, the police had no choice but to ask Qin Yumei first.

It was Xu Lang who was in charge of the inquiry, and Xu Lang first asked Qin Yumei to describe the situation of the day in detail.

According to Qin Yumei's account, on the first night of Shen Jun's death, when Zhu Hongfang came home from work, he found a note at the door, Zhu Hongfang saw the note, and returned home with the note, and told Qin Yumei that someone wanted to sell low-cost and high-grade home-brewed liquor, Zhu Hongfang wanted to buy these boxes of liquor, and Qin Yumei also agreed, after all, Zhu Hongfang neither smoked nor matched in his life, let alone went out to fool around, he only liked the habit of drinking two sips of wine when he had nothing to do, and Zhu Hongfang wanted to buy wine, Qin Yumei naturally couldn't disagree.

So, after obtaining Qin Yumei's consent, Zhu Hongfang left the house, and when he went out, Zhu Hongfang neither brought a mobile phone nor money, and even the note was casually thrown at home by Zhu Hongfang, but the note was lit by Qin Yumei as a fire paper, and Qin Yumei's move made Zhu Hongfang say that he received the note and went to the scene There is no evidence.

Qin Yumei thought at first that Zhu Hongfang was just going to talk to people about wine and would come back soon, but what she didn't expect was that Zhu Hongfang didn't come back, which made Qin Yumei feel a little uneasy, and the next morning, seeing that Zhu Hongfang didn't come back, she thought that her husband was going to work in the factory, but when she went to ask, she found that Zhu Hongfang didn't go to work at all, and the leaders of the factory asked her when they saw Qin Yumei, Zhu Hongfang didn't come to work, and it was at this time that Qin Yumei felt that things were not good.

After she returned home, she thought about it for a while, and first prepared to call the police, but after thinking about it, Zhu Hongfang just didn't return for a night, and he was missing for less than 24 hours, even if he called the police, he would not file a case for investigation, and Zhu Hongfang was almost fifty people, and he didn't come back one night, neither went to work, nor went out to eat and drink with friends and colleagues, so something must have happened, so she went to the abandoned factory according to the place Zhu Hongfang told her when he left.