Criminal Investigation Chronicle

At 2016 am on November 11, 2, the Yanjing Police Station received a report and found a body at the back door of a bar in Yanjing City.The criminal police on duty rushed to the scene. The victim was a young male, tall and thin, who had a hole in his chest with a sharp knife.When Zhao Lei arrived, the scene had already been dealt with. After on-site investigation and identification, the victim was named Li Jun, aged 3. He died between 20 am and 11 am on November 2. The cause of death was that his chest was pierced by a sharp knife, causing A heart artery ruptured and died.There were slight signs of fighting at the scene, and the murderer's footprints were collected at the scene. According to the footprint analysis, the murderer was between 12m1 and 1.7m in height and weighed 1.8kg to 65kg. He should be a man with a strong Kongwu.It was learned that the victim was a frequent visitor to the bar, unemployed, and from a good family background. He basically drank at the bar three or four days a week, sometimes alone, and sometimes with a few friends. On the night of the incident, the victim drank alone at the bar. In the booth near the back door, it is speculated that it is convenient to go to the back door nearby, because there is still a lot of wine on the table, and according to the bar staff, Li Jun usually leaves very late in the middle of the night. "Li Jun was drinking alone in the bar at the time, and he didn't have any conflicts with anyone. This kid is a regular customer here, and he gets drunk occasionally, but he tastes very good. Even if he drinks too much, he never makes trouble. Many people in the bar know each other. Him." A waiter said.Zhao Lei picked up Li Jun's phone, but the phone was unlocked. After opening the phone, the phone was still stuck on a social software dialog box. Zhao Lei swiped a few times and looked at the chat history. The person with the cat, whose profile picture is a young and beautiful girl, the conversation record is very simple, "Are you coming tonight?" "Well, but later." "Okay, wait for you." Sit by the back door, I'll go in through the back door." "Why?" "I'm afraid of being seen by my friends, I told my friends not to go out tonight, it's not good to be seen." "Yeah, understand, I'm here, sit down In the innermost booth, you can see it from the back door." There are not many chat messages, starting at ten o'clock in the evening, and the last message was sent by Li Jun at 70:11.Zhao Lei asked the technicians to write down the relevant information of the kitten, and then asked the bar staff to identify it. "This girl often comes here too. I haven't seen her tonight. She seems to know the deceased. I've seen them drinking together." After collecting relevant evidence, Zhao Lei and his group returned to the police station.

According to the information obtained from Li Jun's parents who rushed to the police station, Li Jun's parents both had good jobs and had a good family background. Li Jun did not continue his studies after graduating from high school and found several jobs, but because he was too young and inexperienced, Unable to endure hardship, he didn't work for a long time, so he became idle at home.But Li Jun is not a lazy dude, although he doesn't have any formal job, he often helps out his cousin's art and play shop. The young man works hard and helps his cousin sell a lot of goods, earning more than enough pocket money.After investigating Li Jun, it was found that Li Jun has a good relationship with others, and I have never heard of any grudges with others. Although he often goes to clubs, the customers and staff of the bar all said that Li Jun has never had any incidents with anyone in the bar. Conflicts, simple social relations, not like vendettas.Moreover, Li Jun doesn't have a girlfriend yet, so love murder is basically ruled out.After Li Jun was killed, the wallet was still in his pocket, and his property was not lost, nor was he murdered for money.

In the early morning of November 11, the police found Kitty Kitty, whose real name is Shen Shan, 2 years old, a native of Yanjing, similar to Li Jun, who did not study after graduating from high school, and was an apprentice in a beauty shop. We met in a bar, and we have known each other for more than ten days. We had two drinks together, and we got along very well.However, Shen Shan did not contact Li Jun that day, and Shen Shan's mobile phone happened to be lost on the afternoon of November 19st.After hearing that Li Jun was killed, Shen Shan was about to cry. She said that she had a good impression of Li Jun, but she didn't expect that Li Jun was killed, and someone came out and invited Li Jun to the bar.

"Where did you lose your phone?"

"I don't know. On the afternoon of the 1st, I went out from the beauty shop to eat, and went to the snack bar I often go to. After eating, I found that my mobile phone was lost. When I called again, it was turned off, because it was replaced by my mother. The old mobile phone is not worth much, and the store is busy, so I didn’t care, so I told my family, and my mother comforted me and said it’s okay, I’ll buy a new one, if I knew it, I should have called the police immediately, then Li Jun might be I won't be killed..." As she spoke, Shen Shan sobbed with self-reproach.

After confirming with Shen Shan's family and the store, what Shen Shan said was true, and Shen Shan was still sleeping at home at the time of the crime, so the suspicion of committing the crime was basically ruled out.

"Can you locate Shen Shan's lost phone?" Zhao Lei asked the technician.

"No, that phone has already pulled out the SIM card. It is using a wireless network. It has not been connected to the Internet since it went offline in the early morning."

"Then can we find clues through social software?"

"It doesn't work, that social software doesn't need a real name, you can use it by registering an account, and you can't track useful information at all."

"Did the monitoring near the scene find any suspicious persons?"

"Not yet. There are many bars in that area, and the flow of people is very high. I haven't found any useful information yet."

"Team Zhao, the preliminary results of the autopsy have come out. The time of death of the victim should have been at 11:2 am on November 12, within 10 minutes before and after. The cause of death was a rupture of the heart artery caused by a sharp knife punctured in the chest. The murder weapon was similar to a dagger. The sharp weapon used to kill him with one knife was clean and neat, and there was a lot of alcohol in the body of the deceased, and the alcohol concentration was consistent with the drinking amount stated by the bar."

"Continue to investigate, according to the current clues, the murderer should know the relationship between Li Jun and Shen Shan, then steal Shen Shan's mobile phone, and it appears that Shen Shan asked Li Jun to go to the bar, and tricked Li Jun to the innermost booth of the bar. Then he waited at the back door of the bar, and killed Li Jun when it was convenient for Li Jun to arrive at the back door. In this way, because he was not sure when it would be convenient for Li Jun to go back, the murderer had to wait at the back door and asked the people who went to the bar that night if they saw him at the back door Suspicious person."

At 11 pm on November 2, Zhao Lei asked Lin Chong to go to the bar where the crime happened.However, probably because someone died just now, the bar was hardly patronized, so Zhao Lei chatted with the bar staff, "How is the business in this bar?" answer. "How was the business last night?" "Generally speaking, Li Jun is the only one inside." Zhao Lei observed the design of the bar. Walking inside, there are relatively quiet small booths with large intervals, which are suitable for talking about love or talking about things. The bathroom is behind the big booth on the left side of the dance floor, and Li Jun sits in the innermost booth, next to the back door. In this way, if Li Jun wanted to go to the bathroom, he had to either go through the ten-odd Mika seat to the very noisy bathroom, or go out the back door to solve it on the spot. Obviously Li Jun chose the latter, and was killed by the murderer.Lin Chong read the file and said: "From the existing evidence, the motive of the murderer is unknown, but the murderer's plan is thorough, and he should have surveyed the scene many times beforehand. This card seat, after drinking, will choose to go to the back door to solve it. This person is thoughtful and agile. He did not deliberately clean up the scene after committing the crime. He is a terrible opponent." Zhao Lei took a deep breath of cigarettes, did not speak, took out a piece of paper and wrote : Killed at the back door of the bar.

Until around 12 o'clock in the morning, Zhao Lei and Lin Chong came out from the back door to make things easier. "Brother Lin, have you noticed that people tend to urinate easily after drinking alcohol, and the diuretic effect of alcohol is still very obvious." It is dark, and it takes a certain amount of time to get used to it before you can see clearly. The murderer is lying in ambush here. When Li Jun is done, when he is the most relaxed, his eyes have just adjusted. The timing and location are very accurate." After finishing the convenience, Zhao Lei and Lin Chong each took a taxi and left...