According to the accounts of the four people at the scene, and after the investigation of the scene, the police temporarily identified the suspects as Zhu Hongfang and Yang Xuewen.

First of all, a bloody brick was found at the scene of death, and after the inspection of the police technical department, it was found that the murder weapon that caused Shen Jun's death was this brick, and the fingerprints of Zhu Hongfang and Yang Xuewen were found on the bricks, as well as the fingerprints of the deceased Shen Jun, and there was no fingerprint of the fourth person.

Then, the police collected blood stain samples on the clothes of Zhu Hongfang and Yang Xuewen, and compared them with the blood stain samples of the deceased Shen Jun, and the comparison results determined that the blood stains on the clothes of the two of them were the deceased Shen Jun's.

It can be seen that the murderer of Shen Jun must be one of Zhu Hongfang and Yang Xuewen, or both of them are murderers of Shen Jun, but in the interrogation room, Zhu Hongfang and Yang Xuewen unanimously determined that the other party was the murderer and he was innocent, which made the second criminal investigation team in charge of interrogation deadlock.

If according to the normal process, there is physical evidence and human evidence, in fact, the two of them can be judged guilty, but whether it is the person killed by Zhu Hongfang, or the person killed by Yang Xuewen, or the person who the two of them killed together, it is still unclear, and there are still many doubts in this case investigation.

First, who is the person who left a note for Zhu Hongfang, Yang Xuewen, and Shen Jun, this person has never appeared from beginning to end.

Second, when the three of them came to this abandoned factory, who stunned the three of them? Is it the one who left them a note.

Third, it is undoubtedly certain that Shen Jun was killed by others, but who killed Zhu Hongfang and Yang Xuewen is worth exploring, although the killing tools were found at the scene and there were two witnesses, but what was the motive for the killing? If it is said that it is for those boxes of highly home-brewed liquor, but the three people did not see those boxes of liquor from beginning to end, and the police did not find those boxes of liquor when they searched the scene, which makes no sense.

Fourth, if it wasn't Zhu Hongfang and Yang Xuewen who killed them, then who would have killed Shen Jun? Could it be the one who left notes for the three people? Or wait until three people come to the scene and stun their fourth? However, why did this person kill Shen Jun? If he was just trying to kill Shen Jun, why did he deceive Zhu Hongfang and Yang Xuewen here? Is it to blame them? But if this is the case, then just find one of them, so that after killing Shen Jun, the fourth person can directly blame Zhu Hongfang or Yang Xuewen, and there is no need to make the police investigation deadlocked like now.

The most important point is, what is the motive for the killing? Whether it is premeditated murder or passion murder, there is a motive for killing, so far, the reason why it is impossible to determine who is the murderer of Zhu Hongfang and Yang Xuewen is actually very simple, that is, what is their motive for killing Shen Jun? To figure this out, we must first investigate the social relationships of the three people.

First of all, Ning Yanran, the person they investigated was the deceased Shen Jun.

A few months ago, a body was found in a public toilet near Caihua Road, although the case has been solved, but not long after, there was another homicide on Caihua Road, and it was killed in a two-way secret room, so nearby residents are concerned about this case.

Not long after Shen Jun's body was found, Shen Jun's family came to the Public Security Bureau to identify the body, and Shen Jun's family did not recognize Shen Jun's bloody face when they saw Shen Jun's bloody face smashed by bricks, and finally Shen Jun's wife recognized the deceased as Shen Jun according to a birthmark on Shen Jun's neck.

In order to determine that the deceased was really Shen Jun, the police took a DNA sample from Shen Jun's son and compared it with the DNA sample of the deceased.

Shen Jun, male, 49 years old, is a veteran employee of a nearby machinery factory.

After the identity of the deceased was determined, the police took Shen Jun's family to identify Zhu Hongfang and Yang Xuewen, and asked them if they knew these two people.

Since Shen Jun's family is not Zhu Hongfang and Yang Xuewen, the police let Shen Jun's family go back first, and the police launched an investigation around Shen Jun.

First, Shen Jun is also a worker in a nearby factory, but it is not the machinery processing factory where Zhu Hongfang is located, but another machinery factory, and Shen Jun and Zhu Hongfang really don't know each other.

Second, Shen Jun has a criminal record in the Public Security Bureau, he has worked in the factory for more than ten years, although the work performance is good, but this person has a bad habit, that is, he likes to steal, likes to take some things in the factory secretly home for his own use, and even secretly took out some parts produced by the factory to sell, because of this incident, he was discovered by the leaders of the factory, and sent Shen Jun to the local police station, Shen Jun was detained for a few days and compensated part of the company's losses. But because Shen Jun is an old worker in the factory and has good skills, the factory did not fire Shen Jun and still let him work in the factory.

Third, some time ago, Shen Jun had a quarrel with another old worker of the factory, the reason was because the old worker found that Shen Jun had not reformed after the last theft, but continued to steal parts from the factory and sell them, this old worker is called Meng Yong-Kang, fifty-two years old this year, a few years older than Shen Jun, he and Shen Jun entered the factory with front and back feet, the personalities of the two people are incompatible, Meng Yong-Kang is an honest person, and Shen Jun is a greedy small-cheap person, at work, Two people often quarrel over work, and in private, the two of them don't get along with each other.

According to this clue, the police found this Meng Yong-Kang.

After Meng Yong-Kang was taken to the Public Security Bureau, he confessed that he did not deal with Shen Jun, and he was not used to seeing Shen Jun always stealing factory parts to sell, and he also admitted that some time ago, he did go out to sell because Shen Jun stole the company's parts, and the two had a quarrel, but he flatly denied that he had anything to do with Shen Jun's death.

Of course, the suspect said that he had nothing to do with the deceased, and the police would definitely not believe it, unless he could provide an alibi, the good news is that Meng Yong-Kang did have an alibi on the day of Shen Jun's death, and the people who proved Meng Yong-Kang's alibi were not one or two, but hundreds of people could prove it at the same time, because the factory where Shen Jun worked 24 hours a day, divided into day shift and night shift, Shen Jun worked day shift, and Meng Yong-Kang happened to work on the night shift, and on the night of Shen Jun's death, Meng Yong-Kang had been working in the factory.

Although Meng Yongkang had a motive to kill, he did not have the time to commit the crime, and there was a complete alibi, so Meng Yongkang's suspicion was ruled out.

After the investigation of Shen Jun was fruitless, the police turned around and went to investigate the suspects Zhu Hongfang and Yang Xuewen.

Yang Xuewen is indeed the owner of a restaurant near the factory, according to the survey of diners who often go to Yang Xuewen's restaurant to eat, they all reflect that although Yang Xuewen is a bit of a businessman, he is not a bad person, the dishes are okay, he usually likes to drink, and he can get home brewing in the countryside, which attracts many diners who like to make home wine.

According to the investigation of Yang Xuewen's relatives and friends and Shen Jun's relatives and friends, it was found that Yang Xuewen and Shen Jun did not know each other, although Shen Jun also worked in a nearby factory, but he had never been to Yang Xuewen's restaurant to eat, Shen Jun usually ate in the factory canteen, or went home to eat.

Some of these investigation results can prove that Yang Xuewen is not lying, and he and Shen Jun do not know each other, but the murder weapon found at the murder scene has his fingerprints on it, and the clothes he is wearing do have Shen Jun's blood stains on them, which is something that Yang Xuewen can't explain clearly.

And the investigation of Zhu Hongfang is the same, Zhu Hongfang is an old worker of the machinery processing factory, usually eat in the factory canteen when he goes to work, and the food in their factory canteen is still very good, after work, Zhu Hongfang went home, ate and drank at home, when Zhu Hongfang's house was searched, he did find some high degree of home wine, but these wines were bought a long time ago, Zhu Hongfang went to the rural relatives to buy, which was not only proved by Zhu Hongfang's wife, It has also been proved by many of Zhu Hongfang's friends.

It can be seen that Zhu Hongfang did not lie, he did not know Shen Jun, and the investigation of the case reached a deadlock here.

After listening to Ning Yanran's narration, Xu Lang pondered for a moment, and then asked, "Do you know this Zhu Hongfang and Yang Xuewen that you are talking about?" ”

Ning Yanran didn't think about it, and said directly: "Before coming, we have already investigated, Zhu Hongfang and Yang Xuewen don't know each other, they only met on the night of the murder, and there are many people who can prove this." ”

Hearing Ning Yanran say so surely, Xu Lang didn't ask anything more, he picked up the cigarette case from the coffee table, took out a cigarette from it and lit it, thinking about the whole case.

First, Zhu Hongfang, Shen Jun, and Yang Xuewen didn't know each other, and they all went to the abandoned factory based on a note.

Second, although Shen Jun was murdered, the tools of the crime were found at the scene, the bloody brick, which had the fingerprints of the deceased, as well as the fingerprints of Zhu Hongfang and Yang Xuewen, but this does not prove that the two of them killed Shen Jun, for two reasons, first, according to Ning Yanran's retelling, on the night of the crime, Zhu Hongfang and the three people came to the abandoned factory one after another, and after they came, they were stunned, and then appeared in the warehouse, they were very scared after waking up, so they found a brick in the warehouse to defend themselvesIn this process, all three people have touched the brick, and naturally they will inevitably leave their fingerprints on the brick at that time; Second, Zhu Hong put the three of them without knowing each other, which makes it impossible to have a vendetta, or love killing, the only possibility is to kill people for money, this wealth is those boxes of high-level home wine, but this is completely inexplicable, first of all, whether it is at the scene or in the home of the three people, I didn't find those boxes of high-level home-made wine, secondly, a few boxes of home-brewed high-grade wine are not worth much, according to the general market, these boxes of home-brewed high-grade liquor are worth tens of thousands of dollars at most, There is no need for Zhu Hongfang and Yang Xuewen to kill people for a few boxes of high-height home wine, even if they want to kill people for wine, but what about wine? So far, there is no trace of these boxes of high-altitude home wine, and although the two of them have the time to commit the crime, they have no motive to commit the crime.

Third, if Zhu Hongfang and Yang Xuewen did not lie, then on the night of the crime, in addition to the three of them, there must have been a fourth person at the scene, and this fourth person was the person who passed the note to the three of them, and at the same time the person who stunned them.

Xu Lang told Ning Yanran what she thought, and after listening to it, Ning Yanran thought about it and nodded, obviously she agreed with Xu Lang's opinion, but then Ning Yanran frowned, looked at Xu Lang who was smoking and asked, "Then according to your meaning, it wasn't Zhu Hongfang and Yang Xuewen who killed Shen Jun?" ”

Before Ning Yanran could finish asking, before Xu Lang could answer, she asked and answered herself.

"If Shen Jun wasn't killed by the two of them, then who would it be? The fourth person to show up at the scene? But it's a two-way secret room, huh? At that time, there were only three of them in the secret room, and there was no fourth person? ”

Seeing Ning Yanran's frowning appearance, Xu Lang spit out a smoke ring and said with a slight smile: "Captain Ning, have you noticed that you have overlooked a very important thing. ”

"What's that?" Ning Yanran looked at Xu Lang puzzled.

"That note." Xu Lang said.

"Note?"

"Zhu Hong's note was burned by his wife Qin Yumei, and Yang Xuewen's note was lost, where is there any note?"

When Ning Yanran said this, her eyes suddenly lit up, she raised her head to look at Xu Lang, and said with a glittering look in her eyes: "You mean the note in the hand of the deceased Shen Jun?" ”

Xu Lang nodded.

Seeing Xu Lang nodding, Ning Yanran slapped her thigh and said loudly, "Why didn't I think of it?" ”

"Smack"

With a crisp sound, Xu Lang, who was smoking, almost jumped up from the sofa, because Ning Yanran slapped not his thighs, but Xu Lang's thighs, Ning Yanran's slap was not small, and Xu Lang was only wearing a pair of underwear, with a thin pair of casual pants on the outside, Xu Lang didn't need to look at it to know that he must have left a distinct slap mark on his thigh.

"Your uncle, I want to slap you on your thigh, why do you slap me, your sister." Xu Lang extinguished the cigarette butt in the ashtray and complained while rubbing his slapped thigh.

Hearing Xu Lang's scolding, Ning Yanran's face was also very embarrassed, she wanted to say something, but she didn't know how to explain, at this moment, Ning Yanran suddenly frowned, and said puzzledly: "No, we didn't see the note in Shen Jun's hand at the scene, and when Shen Jun's wife came to the Public Security Bureau to identify the body before, we asked her, and she didn't know about the note." ”

When Xu Lang heard this, he raised his eyebrows, and felt a little strange, Yang Xuewen's note was lost and couldn't be found, and Zhu Hongfang's note was burned by his wife Qin Yumei, it stands to reason that the note in Shen Jun's hand should still be there, how could it be gone, if he came to the scene after seeing the note, then it should still be there, if Shen Jun didn't come to the scene because of the note, then why did he come? Is it to steal some scrap copper and rotten iron to sell? Impossible, Ning Yanran said just now, it was an abandoned factory, and the things that were a little valuable in it were sold, and it was impossible for anything valuable to be left there, the only valuable thing was those rusty big machines, and it was impossible for Shen Jun to move these things alone.

As for what the truth of the matter is, it is still necessary to return to the scene and see what the scene looks like, so that Xu Lang can have an intuitive impression, and maybe he can find something, so Xu Lang stood up and said to Ning Yanran: "Let's go, just guessing is not enough, let's go to the scene to see." ”

"yes, let's go."

As soon as Xu Lang said this, Ning Yanran immediately stood up and walked towards the door.

Xu Lang, who had just stood up, looked at Ning Yanran's impatient back, Xu Lang stopped and stood in place without moving.

Ning Yanran, who had already walked to the door, didn't hear the footsteps, and felt a little strange, so she turned around and saw that Xu Lang had no intention of leaving, so she asked puzzledly, "Are you going to the scene to have a look?" Why don't you leave? ”

Xu Lang looked at Ning Yanran's beautiful face with a pair of dark eyes, and looked at it for a full minute, and then said slowly: "You came to me, just let me go with you to investigate the scene, right?" ”

As soon as Xu Lang said this, Ning Yanran's face suddenly showed an embarrassed look, Xu Lang was right, the reason why she came to see Xu Lang was to pull Xu Lang back to the scene of the murder with her, and see if Xu Lang could find something useful at the scene.

Seeing Xu Lang standing in place and not moving, Ning Yanran walked quickly to Xu Lang with a smile on her face, grabbed Xu Lang's arm with both hands, and kept shaking: "Why don't we eat and leave?" ”

Xu Lang was dizzy by Ning Yanran's shake, Xu Lang shook off Ning Yanran's hand, and said angrily: "Don't shake, I'm really afraid of you, let's go now, finish reading it early, finish it early, so that I can calm down early." ”

After speaking, Xu Lang took the lead and walked towards the door.

Ning Yanran looked at Xu Lang who was changing shoes at the door, and the corners of Ning Yanran's mouth hooked a touching arc, but Xu Lang didn't notice this scene.

After Xu Lang changed his shoes, the two went out together, and Ning Yanran drove and took Xu Lang to the murder scene on Caihua Road.