Since the last thunderstorm stopped, it has been a sunny day, and on the only road from Dawang Village to the county seat, a Santana full of people is driving slowly, and the road is no longer as muddy as a few days ago, and it is much easier to walk than when I came to Dawang Village on the first day.

Because the words and deeds of the suspect Wang Wu (nicknamed Wang Dacang) were very suspicious, the first team of the criminal police decided to take Wang Dacang to the county bureau for further interrogation and investigation and fingerprint comparison.

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After coming to the county bureau to complete the formalities, Shao Dong sent Wang Wu's fingerprint materials to the technical room and asked Wu Wei for comparison, Wu Wei told everyone that the fingerprints, footprints and DNA on cigarette butts left at the scene did not belong to the deceased, that is, it was very likely to come from the suspect.

Li Tie and Wang Bo went through the formalities and first sent Wang Wu to the detention center for interrogation. Everyone is waiting for the results.

Wu Wei used a day to make a detailed comparison of Wang Wu's fingerprints, and after the results came out, everyone was relieved, Wang Wu's fingerprints were completely consistent with the fingerprints left on the windowsill at the scene, and the footprints at the scene were also very consistent with the characteristics of the soles of the liberation shoes worn by Wang Wu's feet. Cigarette butts left at the scene

Through the comparison of the public security intranet, it was found that Wang Wu had a criminal record, which was 7 years ago, Wang Wu was dealt with by the S Provincial Police on charges of fraud, pretending to be a monk, and defrauding people of property in the name of eliminating disasters, and was sentenced to three years in prison.

This kind of deception of pretending to be a monk and Taoist priest seems incredible in modern cities, but in many remote villages and towns with backward information, many people are still deceived.

Li Tie led everyone to the county detention center to interrogate Wang Wu, Li Tie and Shao Dong were responsible for interrogation, and Wang Bo recorded.

Li Tie was silent, looking at Wang Hu coldly without saying a word, Wang Wu sat on the interrogation chair with handcuffs, his body trembled slightly, and his eyes revealed surprise and horror.

"Wang Wu!" Li Tie suddenly shouted, Wang Wu's body trembled violently, and Ai Ai said: "The government, I, I am wronged." ”

Shao Dong read the fingerprint identification results to Wang Wu.

Li Tie asked, "Wang Wu, the fingerprints left by the murderer at the scene are completely consistent with your fingerprints, what else do you have to say?"

"I, I know you suspect me, I really didn't kill the dog. Wang Wu panicked.

Seeing that Wang Wu was still reluctant to confess, Shao Dong said on the side: "Wang Wu, you have a criminal record before, and it's not the first time you've dealt with us, you should be clear about our policies, be lenient in confession, be strict in resisting, think about it." ”

Wang Wu muttered: "I didn't kill the dog, I really didn't kill the dog." ”

Li Tie said word by word: "You think that if you don't confess, we will have no choice, right? You must understand that according to the law, even if we do not make any confession, as long as we have enough evidence to prove that the suspect is the murderer, we can still convict you and sentence you!"

"I, I, I just stole some money. Wang Wu said.

Li Tie and Shao Dong glanced at each other, and then asked, "Be specific." What happened that day?"

"Probably...... On the night of the 26th, that is, in the early morning of the 27th, since the dog came back, dressed up and looked very generous, playing mahjong every day, I felt that he should have made a lot of money outside, I didn't deal with him, I was thinking about making some money to spend, I was afraid of his revenge if I came hard, so I paid more attention to him in those days, I knew that he played mahjong every night until late, and generally didn't go home until two or three o'clock in the morning to sleep, stayed up for most of the night, and must have slept deeply when I went home, so I set an alarm clock in the second half of the night, while he was asleep, I climbed over the wall into the yard, the door of the living room was locked, and the bedroom window was openI could hear the sound of snoring from the window of the dog's bedroom, so I got into the bedroom from the window and stole more than 1,000 yuan from the dog's bedroom. Wang Wu recounted the experience.

Facing a suspect with a criminal record, Li Tie is very distrustful in his heart, because this kind of person knows the process of police interrogation very well, and can avoid the severity of the confession, trying to reduce or even escape legal punishment.

Li Tie then asked, "You stole the money, didn't Li You notice it?"

"His clothes were at the head of the bed, and I took the money from the pocket of his clothes, and he was still asleep, and I didn't dare to linger, so I ran out. Wang Wu said.

"Where did you run from?" asked Li Tie.

"The gate in the yard was unlocked, it was bolted, and I opened it and ran out. Wang Wu said.

Shao Dong asked: "In other words, according to what you said, the door is open after you leave, and anyone can enter, right?"

"Yes. Wang Wu said.

Li Tie asked: "Then let me ask you, what is the contradiction between you and Li Youjia?"

"That was a few years ago. ”

Shao Dong said on the side: "If you ask you what contradiction it is, you will say that it is contradictory, but I didn't ask you about the time." ”

"Yes, yes, my family and the farmland of the dog egg family are adjacent, because there is a drainage canal from my field, my family has about three points of land, separated to the dog Dan's house, the dog Dan's father said that the three points of land are his family, at that time the village people have no money, life is tight, barely able to eat, so these grains are very important to every family at that time, I have a conflict with his family, and later when harvesting, because of the ownership of this land, our two families have also fought, life has gradually improved in recent years, although our two families occasionally meet or do not speak, but there has been no quarrel, friction like ours is very common in the countryside, not to the point of your life or death. No matter how much you don't understand the law, you know that killing pays for your life. Wang Wu said.

"You stole Li You's money, and then Li You died tragically at home, is there such a coincidence?" Shao Dong was puzzled.

After explaining the facts of the crime of stealing, Wang Wu seemed to be relieved and said: "What I said is true, you can investigate, I really didn't kill anyone." ”

Because there was no tangible evidence to prove that Wang Wu had killed someone, he had to end the interrogation of Wang Wu, and everyone was thinking about it along the way, but no one spoke.

In the investigation of the case, it is common to encounter setbacks, such a murder case with bad means, the fingerprints and footprints are consistent, and the suspect admits to being at the scene and does not admit to committing the murder. This situation is very rare, and although Wang Wu's confession seems reasonable, it still cannot rule out Wang Wu's suspicion of murder.

What is needed to crack the case is a complete chain of evidence, and only by finding the entry point again, such as finding the murder weapon, or the suspect confessing to the murder process and details, can the murderer be confirmed through the restoration of the scene.

"Hello Captain. Shao Dong got up and said, Li Tie and Wang Bo both stood up.

Deng Kai, the captain of the criminal police brigade, pushed the door and walked in. He smiled behind his back and said, "Sit down, I'll come and see." ”

"Why are you so sad?" the case has encountered a problem?" Deng Kai asked.

"Team Deng, we have encountered some problems, but we are still working hard to investigate, and we will continue to Dawang Village tomorrow. Li Tie replied.

"I listened to Lao Wu report this case to me, and I learned that you have been investigating in Dawang Village, I am very concerned, I asked Wu Wei to understand the case yesterday, I just heard that you are back, I came over immediately, you look at this. Deng Kai said, took out a file bag and handed it to Li Tie.

Li Tie opened the paper bag, took out the information and looked at it, and said, "Serial murder?"

"Look, the murderer's modus operandi is similar to the serial murder case more than ten years ago?" Deng Kai said.

Li Tie opened the file and threw himself into it, forgetting that there was still a captain by his side.

"The case in Dawang Village was not a murder with a sharp stabbing weapon, there were no traces left at the scene, in order to prevent the footprints from being exposed, the murderer's feet were also wrapped in cloths, towels and other disguises, and the deceased was a wealthy local person. Deng Kai asked.

Shao Dongdao: "Yes, captain, you are all right. ”

Wang Bodao: "Captain Deng, is the murderer in the serial murder case a person?"

After analysis, the murderer was a single person, and he was a middle-aged man, and now he should be a middle-aged man. It has been 15 years since the first case of the serial murders, and the deceased were between 24 and 33 years old. Now let's study and analyze the murderer's modus operandi, whether there is any possibility of combining the cases for investigation. Deng Kai analyzed.

Li Tie closed the file and said solemnly: "Deng Brigade, from the murderer's modus operandi and murder weapon habits, in the Dawang Village homicide case, an unfinished cigarette butt was found at the scene, and the martial forensic doctor extracted DNA from the cigarette butt, and it can already be determined that the cigarette butt was not smoked by the deceased, but it is not certain that it was not left by the suspect." ”

"Among the seven cases of serial homicide, the scene of one of the cases had a palm print printed on the wall calendar and bloodstains, because the criminal investigation technology was backward at that time, DNA technology was not applied at that time, and at the time of the crime, the investigators had never heard of what was called 'DNA', so they only extracted evidence from the scene as much as possible, because of the lack of clues, these seven cases became unsolved. The calendar was also packed into an evidence bag and placed in a filing cabinet. Deng Kai said.

Shao Dongdao: " In the early 90s of the last century, China's public security system can do biological evidence identification, most of them are just to check the blood stains of ABO blood type, 91 years when China introduced DNA fingerprint technology, as the first generation of DNA identification technology, this technology to complete the detection requires a large number of samples, must be a complete piece of tissue, or a tube of fresh blood, the DNA extracted from the calendar is very small, the technical conditions at that time can not do any results, but in the past ten years, China's DNA identification technology has achieved rapid development。 After 2000, the first-generation DNA fingerprinting technology was gradually replaced by "fluorescently labeled multi-locus STR composite amplification detection technology". Compared with the first generation of technology, this technology only needs a small number of DNA templates to meet various identification needs, not to mention that we also have a university scholar Wu Wei, which can be fully operated. ”

While speaking, everyone looked at Shao Dong, Deng Kai asked with a smile: "Haha, interesting, this shows that you worked hard when you were studying, you told me all these martial arts you said, I have handed over the physical evidence wall calendar to Wu Wei back then, and it will be up to you to solve the case later." ”

"Yes, Captain. Shao Dong said.

Deng Kai said: "Good performance, do a good job." In the future, you will be given a heavier burden organizationally. Deng Kai said.

"Yes!" Shao Dong said.

"You study the file, you have been very busy recently, the bureau has limited manpower, Lao Wu is leading 2 teams to investigate a case of abduction and trafficking of women, so I can't send you more police, only hard work. Deng Kai said and walked up to Li Tie, patted Li Tie on the shoulder and said: "Lao Li, I heard that you are stationed in Dawang Village, and you have worked hard recently, and when the net clearing operation is over, I will give you a vacation, but there is a premise, that is, you must complete the task for me." ”

"Don't worry, Brigade Deng. Li Tie said.

Deng Kai took out half a Chinese cigarette from his pocket, handed it to Li Tie and said with a smile: "Take it, I quit smoking, your sister-in-law doesn't allow me to smoke." ”

Li Tie smiled with a cigarette. "Thank you, Team Deng, say hello to my sister-in-law for me. ”

"Hmm. Deng Kai waved his hand, turned around and walked out.

Wang Bo gave Shao Dong a thumbs up and smiled: "Brother Dong, cow wow." ”

Li Tie opened the box of cigarettes and said, "Come, two boys, each take two packs." ”

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