Solving the case: Combining the police dog's olfactory genes at the beginning

Luo Fei stared at Cheng Wei. This guy was not slow to react. He knew that the police could easily confirm that Zhao Yi was pregnant, so he directly confessed that he had lied to Lin Gang.

"After knowing that Lin Gang killed your father, you not only did not think of calling the police to arrest Lin Gang, but you even wanted to help Lin Gang escape from legal sanctions. Does this mean that you have no feelings for your father at all?" Luo Fei He asked, staring closely at Cheng Wei.

Cheng Wei shook his head, "No, I have a very good relationship with my father. After I found out that my father was accidentally killed by Lin Gang, I felt extremely sad. This is the father who gave birth to me and raised me, and he is also my only father in this world." relatives."

"I wanted to call the police to arrest Lin Gang, but what would happen? If I catch Lin Gang, would my father be able to come back? This is not possible. If you die, you will die, and Lin Gang is my good friend. I asked him to steal the money. In a way, it was my fault that led to this tragedy, and I have a lot of responsibility."

"So after thinking about it for a long time, I gave up the idea of ​​calling the police to arrest Lin Gang. Of course, I was also afraid that the police would really catch Lin Gang. If Lin Gang confessed, he would be implicated. After all, my father is gone, but I still want to live, little Yi is still waiting for me, I can’t let anything happen, I can’t let Xiao Yi lose me and live alone.”

Cheng Wei's statement can be said to be watertight. It was obviously thought up a long time ago. Luo Fei did not believe that Cheng Wei could make up such a complete statement now.

"You lied. We learned that you don't have a good relationship with your father?" Luo Fei asked coldly.

"That's the misunderstanding that outsiders have about us. Our father-son relationship is very good, but we just haven't shown it." Cheng Wei explained.

Luo Fei didn't ask again. He knew that in the current situation, even if he asked again, he wouldn't be able to get anything out of it. He gave Cheng Wei a cold look, and then called Sun Jun out.

Soon Luo Fei and Sun Jun left the interrogation room together.

Outside the interrogation room, Zhao Donglai and Zhang Fan, the leader of the second team, were both there.

"Captain Zhao, this guy is very calm and cunning. If we can't find tangible evidence, I guess it will be difficult to get him to tell the truth." Luo Fei and Zhao Dong came to report.

Zhao Donglai frowned. He also saw what happened in the interrogation room just now. Cheng Wei looked like a very calm and smart person. This kind of person is really difficult to deal with.

"In the case of Cheng Zhiyou's murder, it can be said that Cheng Wei only asked Lin Gang to steal money from the beginning to the end. Coupled with some coincidences in time, this resulted in this seamless murder. Cheng Wei did nothing else. It seems like it was just an accident. We want to find evidence of Cheng Wei's murder. Unless Cheng Wei takes the initiative to admit it, I think it will be difficult." Zhang Fan also said with a solemn face.

Luo Fei did not speak. Judging from the current situation, it must be said that Cheng Wei used an accident to kill Cheng Zhiwei. This was indeed a very clever method. It is really difficult to find evidence in this case, but Cheng Wei really had no choice but to let Lin Have you ever done anything except steal money?

"It is indeed difficult, but no matter how difficult it is, we will still solve it. The purpose of our criminal police is "to solve murder cases" and "never let any bad guy go." Zhao Donglai said firmly at first, and then looked at Luo Fei and Zhang Fan, " You go down and think carefully about how to investigate this case. At twelve o'clock, we will hold an impromptu meeting in the conference room to gather everyone and discuss it again."

"yes"

"yes"

Zhang Fan and Luo Fei nodded.

Luo Fei came out of the interrogation room and went directly back to the third group's office.

In the office, Sun Jun and others were discussing the case.

"This is really difficult to handle. Excluding the fact that Cheng Wei instigated Lin Gang to steal money, the murder of Cheng Zhiyou can be said to be an accident. How can we find evidence?" Wang Yong looked irritated.

"Yeah! How can we find evidence for this? It's too difficult to find evidence." Zhao Cheng also followed suit.

Sun Jun said: "There can be no perfect murder. As long as it is a murder, there will definitely be evidence, but we haven't found it yet."

Luo Fei also agreed with Sun Jun's words. There can be no flawless murder. As long as it is murder, there will definitely be clues left.

"Team Leader"

"Team Leader"

Seeing Luo Fei come in, Sun Jun and others greeted Luo Fei one by one.

"Well, come here. Team Zhao will hold an impromptu meeting at 12 o'clock to analyze the case. Our team will have a brief meeting to discuss it first." Luo Fei walked towards the case analysis panel.

Luo Fei wiped the blackboard clean, and Sun Jun and others came over.

"Now let's sort out our thoughts."

"First of all, let's presuppose that Cheng Wei is the murderer of Cheng Zhiwei?" Luo Fei said, raising his hand to write Cheng Wei-murderer on the blackboard, and then wrote the reasons and conditions for committing the murder next to it. .

"Secondly, there is the reason. Why did the murderer kill Cheng Zhiyou? He and Cheng Zhiyou have a father-son relationship. What hatred is there between them?"

"One more thing is that the murderer wants to carry out his own murder plan, so what are the conditions for the murder?" Luo Fei pointed at the blackboard and asked continuously.

"The cause of the murder is not known, but the conditions for the murder are obvious. First, Lin Gang was asked to steal money in the room. Second, Cheng Zhiyou happened to come back when Lin Gang stole the money." Sun Jun answered.

"Then there are two questions. First, how did Cheng Wei determine that when Lin Gang stole the money, Cheng Zhiyou just came back? You must know that Lin Gang entered the room, found the money in the bedroom, and then went out. All of these together could be at most It's only ten minutes, how can Cheng Wei guarantee that Cheng Zhiyou will be back within these ten minutes?" Luo Fei asked.

"This" Sun Jun thought for a while, but couldn't think of a suitable reason for a while.

"Could it be that Cheng Wei called Cheng Zhiyou and asked him to come back?" Wang Yong looked at Luo Fei and asked.

"The people in the second team checked the communication records of the deceased. The deceased did not receive any calls that night." Luo Fei shook his head and answered.

"Secondly, Lin Gang broke into a house to rob and was caught by Cheng Zhiyou. Why did Lin Gang kill Cheng Zhiyou? There are cases of break-ins and robberies, but those are small-probability events. Cheng Wei really wanted to murder Cheng Zhiyou. Do you think he was betting on this small probability? Incident?" Luo Fei continued to ask.

Sun Jun shook his head, "The probability is too small. Cheng Wei wants to murder Cheng Zhiyou in this way. I think it is unlikely to work unless he is lucky."

"But the reality is that Cheng Wei did it. Lin Gang successfully killed Cheng Zhiyou. Do you think it was an accident with a small probability?" Luo Fei then asked.

The members of the three groups either frowned or scratched their heads.

"I can't figure it out at all." Wang Yong felt that his brain cells were dying rapidly. He really couldn't figure it out, and then gave up thinking completely.

"Actually, the first point should be easy to figure out, and that is a matter of habits. Cheng Wei and Cheng Zhiyou have a father-son relationship. Cheng Wei should be well aware of all Cheng Zhiwei's daily habits."

"I guess Cheng Zhiyou must have a habit, mostly a daily habit, which is to come back around ten o'clock in the evening. That's why Cheng Wei asked Lin Gang to steal money at ten o'clock. In this way, the probability of Lin Gang and Cheng Zhiyou bumping into each other will increase infinitely. As for whether the specific situation is like this, we can just verify it with the neighbors around Cheng Zhiyou."

"One more thing, have you ever thought about it? Lin Gang went to steal money, and there is a certain irrationality in holding a knife. It's not a burglary, he just stole money. I think few thieves would steal with a knife. Money, right?”

"Secondly, the deceased Cheng Zhiyou was stabbed eight times in total. Lin Gang broke into the house and was discovered by Cheng Zhiyou. According to a normal person's logical thinking, the first thought at this time must be to run away. However, according to Lin Gang's own confession, he was in a state of confusion at the time. He was blank, so he stabbed him with a knife, and Cheng Zhiyou grabbed his shoulder, so he stabbed and chopped at Cheng Zhiyou randomly."

"This is nothing in itself, but I thought about it carefully and simulated the scene in my mind. But no matter what, the direction of the two stab wounds on the deceased's lower back cannot be explained."

"Just now, taking this opportunity, let's decorate the office and simulate the scene at that time to see under which circumstances Lin Gang could cause two stab wounds on the deceased's lower back." Luo Fei ordered .

Then several people roughly arranged the office according to the decoration of the living room of the deceased Cheng Zhiyou.

"In this way, Wang Yong plays the deceased Cheng Zhiyou, and Sun Jun plays Lin Gang. You should all understand the situation, but I still tell you. First, the deceased entered the door and turned on the light, and saw Lin Gang who was about to leave. Lin Gang looked at The deceased stabbed the deceased with a dagger. The deceased grabbed Lin Gang's shoulder, and Lin Gang couldn't get away. He stabbed and slashed randomly. The two of them struggled together, and the deceased finally fell on the sofa. "Luo Fei explained the situation.

"Captain, can I not play the role of the deceased?" Wang Yong said with a bitter look on his face.

"You are about the same height and shape as the deceased. If you don't play the role of the deceased, whoever will play the role of the deceased should stop beeping." Sun Jun said dissatisfied.

"Okay, get ready. Remember from now on, you two are the murderer and the deceased. Let's get started. Let the three of us go over there and don't affect their performance." Luo Fei handed Sun Jun a piece of chalk. , acted as a knife, and then walked aside with Zhang Fan and Zhao Cheng.

Then Wang Yong walked out of the room and closed the office door.

Sun Jun holds the bag in his left hand and chalk in his right hand.

"The pen should be in your pocket at this time." Luo Fei frowned and reminded Wang Yong.

When Sun Jun heard this, he quickly put the pen into his pocket.

The deceased, played by Wang Yong, opened the door and entered the house, turned on the light next to him, and then saw the murderer, played by Sun Jun, in the living room.

The two were stunned for a moment, and then Sun Jun took out the chalk and stabbed Wang Yong hard.

Wang Yong was stabbed, but it was not fatal. Wang Yong immediately grabbed Sun Jun's shoulder. Sun Jun tried to break away, but couldn't. Sun Jun then slashed and stabbed Wang Yong frantically.

Wang Yong was already in the drama at this time, and subconsciously hugged Sun Jun, and the two struggled together.

Later, the deceased played by Wang Yong lost too much blood and was exhausted, so he was pushed down on the sofa by the murderer played by Sun Jun. Sun Jun saw that the deceased was not moving, so he hurriedly left the room.

"Team leader, how are you?" As soon as it was over, Wang Yong got up and asked quickly.

Luo Fei looked at the chalk marks left on Wang Yong's body. Except for the marks on his abdomen and hands, there were no marks on his lower back, and then frowned.

"No, let's do it again. This time, you two struggled together, and then they both fell on the sofa. The murderer stabbed the deceased on the sofa, and he must have been stabbed in the lower back." Luo Fei said.

Sun Jun and Wang Yong didn't waste much time. They would definitely try to simulate the case again and again.

Then the two conducted a new simulation.

"No, Wang Yong, the deceased you played should not have the strength to resist at this time."

"No, Sun Jun, the murderer you are playing, you are holding a knife in your hand right now. Where is your knife?"

In the office, Luo Fei recalled the scene of the crime in his mind, correcting Wang Yong and Sun Jun's actions over and over again.

However, no matter how he simulated it, there was no way to explain the direction of the two knives on the deceased's lower back. Sun Jun wanted the direction of the knife to be the same as the direction of the wound on the deceased's lower back, so he could only use a very awkward posture, which was inconsistent with common sense.

There was only one situation in which Sun Jun stabbed Wang Yong, and the direction of the knife edge on Wang Yong's lower back was almost the same as the direction of the wound on the deceased's lower back. That was when the deceased, played by Wang Yong, died, and Sun Jun walked to the middle of the sofa and stabbed him. The dead man makes a last-ditch attack.

"So, Lin Gang performed a last-ditch attack on the deceased after he fell on the sofa? But didn't Lin Gang say that he was in a panic at the time? Why did he think of a last-ditch attack? Could it be that Lin Gang lied?" Sun Jun asked.

Luo Fei also frowned. The last hit did not make sense, but it didn't seem right to Luo Fei that Lin Gang was lying.

But what if Lin Gang didn't lie? Does that mean there was a third person at the scene? After Lin Gang left, he saw that the deceased was not dead, so he performed a follow-up shot.

Cheng Wei

Almost immediately, Luo Fei thought of Cheng Wei, this handsome and calm man.

Could it be that from the beginning, Lin Gang was Cheng Wei's scapegoat? What Cheng Wei thought was that Lin Gang could kill Cheng Zhiyou. If Lin Gang didn't kill Cheng Zhiyou, Cheng Wei would kill him himself. Cheng Zhiyou framed Lin Gang.

So after Lin Gang killed someone, Cheng Wei entered the room and checked the situation. He saw that the deceased had only been stabbed but not dead, so he stabbed him twice more.

Just when Luo Fei was thinking crazily.

"Team leader, the meeting is starting at twelve o'clock." Wang Yong reminded from the side.

"Then let's go."

Then the three groups rushed to the conference room together. At this time, almost everyone from the criminal police team was in the conference room.

After waiting for a while, when everyone had arrived, Zhao Donglai asked everyone to express their opinions on the current situation.

"Team Zhao, there is a new situation on the forensic side. We just discovered it and haven't had time to report it to you yet," Yang Mei said.

"What's going on?" Zhao Dong came to look at the technical room.

Xiao Ma, the forensic doctor in the technical room, stood up and replied: "That's right, Captain Zhao. After we dissected the body, we found that several stab wounds on the deceased were somewhat different. We found that there were four stab wounds on the deceased's abdomen, and there were obviously many wounds on the body." There was a large piece of bruised and abrased skin, while the two wounds on the deceased’s lower back were neat and smooth without any bruises.”

"So we suspect that the stab wounds on the deceased were caused by two knives of the same shape but with different sharpness."

On the other side of the third group, Sun Jun and others immediately looked at Luo Fei as soon as they heard the forensic doctor Xiao Ma's words. This was completely consistent with the situation they had just simulated.