On Monday and Tuesday, Xie Qing followed Cao Haisheng to the city hospital twice and participated in the appraisal of a medical accident.

On Wednesday, the master and apprentice had some free time and sat down in the office.

Xie Qing made a cup of green tea for Cao Haisheng and Chen Qian, and drank a cup of Tieguanyin for herself.

"Knock, knock." There were two knocks on the door. Li Ke poked his head in and beckoned to Xie Qing.

Xie Qing glanced at Cao Haisheng, who looked up from the internal newspaper and said, "I'm fine, go ahead."

Xie Qing then left the office holding the cup of tea.

Li Ke pulled her to the stairs and said, "Ji Ge and I found a case in the old city police station and wanted to show you."

Xie Qing asked, "Has Captain Huang seen it?"

Li Ke whispered, "Not yet. I'm afraid of making fun of him, so I didn't dare to say it."

They were all newcomers and understood.

Xie Qing followed Li Ke to the office of the second brigade.

Li Ji had already prepared a chair. As soon as Xie Qing sat down, he pushed the copied file over.

Xie Qing took a sip of tea and read it leisurely.

The deceased was a male from the old city, 56 years old, with a history of domestic violence and alcoholism. He not only beat and scolded his wife and children, but also sometimes hit his father who was over 80 years old.

In the late autumn four years ago, this man was stabbed to death. When the body was picked up at the mouth of Qingjiang River, it had already shown signs of gigantism - a highly decomposed corpse.

The forensic doctor judged that the deceased had been dead for at least seven days.

Seven days was enough time for the murderer to destroy unfavorable evidence.

After several twists and turns, although the detectives of the branch found the crime scene, they could not find even a valuable footprint.

So the case became an unsolved case.

Li Ji saw Xie Qing turned to the last page and asked, "How is it?"

Xie Qing said, "It's a bit similar."

Li Ke asked, "How is it similar? It is clear that the only thing that is consistent is that the deceased was confused and thrown into the Qingjiang River."

"That's what I think." Xie Qing turned the file back to the autopsy photo page. "The murderer stabbed thirteen times, and the stab wounds were randomly distributed, which shows that the murderer was not mentally prepared and was extremely panicked when he killed people. Here and there are the locations of the aorta. After the dagger pierced and then pulled out, there must have been spurting blood all over the murderer's head and face. This kind of stimulation must make people feel terrified."

Li Ji understood, "So, this will prompt him to change his killing method. If so, will the brick-throwing case be the murderer's second crime?"

Xie Qing shook her head. "It's hard to say. I think the murderer can draw three conclusions from this case. First, the body was thrown to Qingjiang, and the police could not determine the crime scene; second, Second, after the body was fished out, it received a lot of attention, which was an encouragement to him who liked to punish evil and promote good; third, drowning was a clean and easy-to-use method of killing. In addition, the brick murder case found in the archives was later than this one. If the murderer saw the news and had the idea of ​​combining the two, it is not impossible. "

Li Ke was convinced, "It makes sense, it makes a lot of sense. Qingqing, have you taken criminal investigation as a minor?"

Xie Qing said, "To become a qualified forensic doctor, you must be a qualified generalist." She took another sip of water, "What I said may not be right, but I think I can explain it to Captain Huang."

Li Ji said, "Okay, we'll tell him when he comes back."

…

At eight o'clock in the evening, Xie Qing came back from the training room and was about to go to the bathroom to wash up when she saw Li Ke running up to her. "Qingqing, I want to take a shower too. Wait for me."

Xie Qing agreed.

Three minutes later, the two of them were in the bathroom.

"Qingqing, you have a great figure." Li Ke looked at her from top to bottom with envy.

Xie Qing looked at her breasts with regret, then looked at Li Ke's clavicle and below, "It's much bigger than mine, but it's still good. Besides, you're two centimeters taller than me."

Li Ke didn't understand the hidden meaning in her words, and pouted, "What's good about it? Look at my thighs, real elephant legs."

Xie Qing closed the wooden door to block the curious eyes of the other female police officers, "I'll teach you a set of exercises to slim your legs tomorrow."

Li Ke was happy again, "Not tomorrow, teach me later."

...

After taking a shower, Li Ke went to Xie Qing's dormitory.

She sat on the bed that Xie Qing had prepared for outsiders and said, "Captain Huang felt that this case was indeed similar to the Huang Qi series of cases, but the conditions for merging the cases were insufficient, so he handed it over to me and Ji Ge. Ji Ge and I visited the crime scene and the home of the deceased."

At this point, she left the topic in suspense and winked at Xie Qing, "What do you think we will find?"

"You are just being mysterious." Xie Qing dug a finger of Pechoin for her, "Since you asked, you must have gained nothing."

Li Ke was disappointed and applied the cream on his face weakly, "You are so weak, can't you cooperate?"

Xie Qing said, "You are going in the wrong direction."

Li Ke regained his spirits, "Then what do you think we should do?"

Xie Qing said, "The first case of the murderer is usually in an area he is familiar with. He is very likely to live in the old city. You should start with the information of the taxi driver or the owner of the Xiali car obtained from the traffic police, circle out the people who meet the age and region, and then conduct a focused investigation."

Li Ke said, "I'm afraid there are quite a few people."

"Actually..." Xie Qing poured her a glass of water and sat down at the desk. "I still tend to think the murderer is a taxi driver."

Li Ke sat up with his legs crossed. "Why?"

Xie Qing said, "Taxi drivers spread information quickly. They also know a lot when soliciting passengers and waiting for work, which makes it easier for them to identify the murder target."

Li Ke asked, "Didn't Lao Du say..."

Xie Qing raised her eyebrows. "Lao Du is talking about reason, not means, but he would never refuse to start with the taxi driver. "

Li Ke was silent, gulping down a few mouthfuls of water, "I understand."

Xie Qing opened the work notebook and wrote a few words with a pen, "Don't take it to heart, isn't your master very good to you?"

Speaking of the old criminal policeman Liu Feng, Li Ke felt a little aggrieved, "My master doesn't like to talk, and he doesn't call me when he has something to do. He doesn't seem to like girls."

Xie Qing casually drew a little man on the paper. The little girl was wearing pajamas, hugging her knees, crying with tears flying all over the sky. "Old Liu is a good man. You are a girl. He may be afraid that you will get hurt. You should show your ability and show the same spirit as when you slapped the thief in the barbecue restaurant."

"That's true." Li Ke nodded. "My dad told me a long time ago that it's not easy for girls to get along in the criminal police team."

Xie Qing clenched her fists. "I believe in you. Come on!"

"Come on." Li Ke put down the cup and stretched his legs. "By the way, I want to lose weight on my legs. Hurry up."

...

Thursday morning.

Xie Qing received a strange pager while having breakfast: I'm going to climb the mountain with your brother on Saturday. Do you want to go? Chai.

Xie Qing didn't understand. Chai Yu obviously liked Xie Yun, so why did he suddenly become interested in her?

After much thought, she decided not to return the call - if she wanted to stay away from the main plot, she had to break away from the main character.

In the afternoon, Li Ke and Li Ji went to see Xie Qing again.

Li Ke pointed to the printed paper on the desk, "We integrated all the data we got in the early stage. The old city is densely populated, and we found more than a hundred people based on age and Xiali cars."

Li Ji spread his hands, "Three cobblers are better than Zhuge Liang, there are too many people, you help us with the staff."

"Okay, let me see." Xie Qing opened the printed paper, "Have you combined it with other colleagues' investigations along the river?"

Li Ke said, "Those with one five-pointed star are taxi drivers along the river, those with two five-pointed stars are our respective suspects, and those with three are common suspects. But considering the murderer's cunning, he may not really be a taxi driver, so Qingqing, don't be afraid of trouble, don't be influenced by us, go through the overall situation first."

"Okay." Xie Qing lowered her head and read through them one by one.

The form has four pages, recording the driver's name, gender, date of birth, education, marital status, address, license plate number, car model, contact number, emergency contact, etc.

The last page is the criminal police's investigation results, the taxi driver's range of activities, and other drivers' evaluations of the driver.

The information seems detailed, but it is really difficult to guess the criminal based on this.

Xie Qing thought for a long time and decided to start with education.

She believed that the murderer understood the law and had high moral standards, so he attacked the victim, and he might also have high requirements for himself.

He was restrained in the frequency of his crimes, put a lot of thought into the selection of his victims, was careful and patient in the crime process, acted decisively, and chose the perfect place to dump the bodies, which all showed that he was quite smart.

His education level might not be too low.

Therefore, elementary school and junior high school education can be ruled out.

The second is the emergency contact.

The murderer has an extreme personality and is jealous of evil. He may have been bullied when he was young, or his parents are incompetent or absent. The murderer may also be from a normal family, but since it is a screening, of course, the family background that is most likely to have committed a crime should be selected.

Then, those who leave their parents in the emergency contact column can be ruled out.

Combining the situation found by other criminal police, Xie Qing circled seven names.

She took a pencil and drew a horizontal line under each name.

Li Ke came over immediately and said, "Hey, there are some overlaps between your choices and mine... and some that passed the exam, but you didn't have the ones that we both had in common."

Li Ji also said, "How did you choose?"

Xie Qing looked around and saw the three veteran detectives in charge of the Huang Qi case there, so they sighed and said, "I was just making it up. How did you choose?"

Li Ke and Li Ji looked at each other.

Li Ke said, "Combined with the family situation and the descriptions of other drivers, we also saw a one-inch photo of the driver at the traffic police station. Although it's not very good, it does mean judging people by their appearance."

Li Ji nodded, "Anyone could be the criminal, and anyone could not be the criminal. We don't have enough clues, so we have no choice."

Li Ke asked, "What about you? How did you choose?"

Xie Qing was a little hesitant. She mixed a small amount of psychological profiling into her choice. It was not very scientific, nor was it very rigorous. It might not be correct, and it might lead to countless disputes.

She said, "I just picked them randomly, you don't have to tell me."

Li Ji doubted, "You've been watching for so long, you are not here to recruit troops

and generals, are you?" "If you don't go out to investigate, how can you recruit troops and generals?" Huang Zhenyi walked into the office with a serious face, "Another week has passed in a flash, and there is not even a key suspect. Are you guys still standing here to recruit troops and generals?"

Several old criminal police grabbed their bags and went out in shame.

Li Kefan blushed and defended, "Captain Huang, we just came back from the traffic police team and are studying how to narrow down the target."

"Oh." Captain Huang smiled again, "I see, young people know that it's a good thing to use their brains. How about it, have you figured it out?"

Xie Qing: "..." His expression changed so quickly.