Author: Gao Buwei

The time arrived at 5:30 pm, and everyone came back one after another, all very tired. Xiao Liu first reported the control situation: "We visited all the gold shops in the county and distributed photos of stolen jewelry. As long as the same jewelry is found,

They will call us. There is a gold and silver jewelry workshop that is not open, but the boss has been notified."

Police officer Lao Zhang, who was in charge of investigating the social relations of the deceased, said: "The deceased was a typical Bai Fumei. She had almost no friends in both her life and work circles, and basically lived alone. Her colleagues recognized her abilities, but

I hate her very much and think she is a person who is not easy to get close to. Neither do the neighbors.

We were willing to deal with her, but thought she was difficult to deal with. Our idea was to get a deeper understanding of her social relationships, but the result was still the same as the first visit, with no more clues. We also investigated the dispute with Lin Qing

Liu Ping, because she was complained by Lin Qing, Liu Ping was suspended from work a few days ago to reflect. On the day of the incident

, she has reconciled with Lin Qing. In fact, they are very similar. They were both under a lot of pressure. After talking to each other, they reconciled. As we saw in the video, Lin Qing withdrew the complaint. Today, Liu Ping has

She was reinstated. There was no need for her to take revenge on Lin Qing. According to Liu Ping’s account, she met Lin Qing on the day of the incident.

Afterwards, she apologized and Lin Qing called to cancel the complaint. After leaving Shuxin Jiayuan Community, she sang at Shengtang KTV with several female classmates in the dormitory in high school. We have checked and they sang until 1 in the morning.

We left at 0:00 and didn’t go out during the trip. The surveillance at the entrance of the KTV confirmed this."

Captain Hong asked: "Team Leader Huang, what's the situation over there?"

Huang Yiwei was already deep in thought. It wasn't until Captain Hong called him that he came back to his senses: "We don't have any valuable clues here."

Captain Hong said: "I checked all habitual thieves and ex-convicts with a history of theft. There was nothing unusual, at least nothing related to our case. What a habitual thief said reminded me that it is not necessarily the case that he said he could open the door.

He is a locksmith. If the old-fashioned door lock is not locked, it can be opened with a card, and ordinary people can do it. If his words are true, our investigation scope will be larger and the investigation difficulty will also increase. "

Everyone was silent. After a long time, Huang Yiwei spoke: "I will go to the scene again. Pi Peng and Xiaodong will come with me. Team Hong and everyone else, everyone should rest!"

They came to the crime scene again, went directly to the roof, turned on the flashlight, and observed carefully. Then they came down from the roof and carefully checked every steel bar on the ladder. They went down to the door of 502 and checked the door lock and door.

The lock has a deadbolt anti-theft function and cannot be opened with a card. The lock cylinder is relatively new, and the traces of prying and pressure are in the keyhole, which is not very obvious. It can be determined that it was opened with a professional lockpicking tool.

Pi Peng and Che Xiaodong rechecked the living room, and Huang Yiwei came to the wardrobe in the bedroom where the jewelry was kept. After opening the wardrobe, there was a drawer inside, and he opened the drawer gently. There were traces of a jewelry box at the bottom of the drawer, and Huang Yiwei

I shined my flashlight close to the bottom of the drawer and found that there was no floating soil where the jewelry box was placed, but there was floating soil in other locations.

He moved his hand, and Huang Yiwei suddenly felt that there was something slightly shining at the bottom of the drawer. Huang Yiwei felt a little strange, so he moved his hand again, and the same thing happened. He felt that there must be something at the bottom of the drawer. He quickly put it

Pi Peng called over, and Pi Peng also found it strange. He covered the bottom of the drawer with transparent tape and put it in the evidence bag. They were a little frustrated when they didn't find anything more.

After returning, Pi Peng examined the extracted material overnight. Pi Peng observed it with a microscope: "This should be a metal."

Huang Yiwei said: "Why is there metal powder in the wardrobe?"

Pi Peng said: "For example, the hardware accessories of the wardrobe at the scene are also silver-white. It is possible that debris was stuck during processing, but it may also be left behind when the murderer took away the jewelry box."

"According to Lin Qing's habit, it should be kept very clean. There is loose soil in the drawer, which means that the drawer has not been opened for a long time. The metal debris is probably left by the murderer. You need to determine the composition of the metal debris as soon as possible." Huang

Yiwei suddenly thought of it and said, "Could it be that it comes with a key? It is very likely that there are such silver-white debris stuck on it."

"It is possible that when the key is polished, there may be debris from the key stuck on it, and the key blank is usually made of alloy and silver-white," Pi Peng said.

"Hurry up and identify what kind of metal this debris is? It's too late today, let's talk about it tomorrow," Huang Yiwei said.

Back at Xicheng Hotel, Huang Yiwei took the door card and pressed it on the door lock, but the door did not open. He looked at the door card, then leaned down and looked at the sensor lock. There were some scratches on the sensor lock and the door handle.

It was very worn out. Just when he wanted to try the door card again, he suddenly thought of Lin Qing's door lock and wondered: "It's an old door lock, why is the lock cylinder so new? Has the lock been changed recently?"

Core?" He decided to return to the scene.

Arriving in the corridor of Lin Qing's house, he used the flashlight on his mobile phone to shine on the door lock. Sure enough, the door lock was old and the lock core was new. The lock might have been changed recently. After thinking for a moment, he found something on the wall of the corridor.

He called four unlocking phones and took photos with his mobile phone. Huang Yiwei felt confident and returned to the hotel with satisfaction.

The next day, Huang Yiwei came to the criminal police team early. Unexpectedly, he saw Pi Peng busy in the laboratory as soon as he arrived. He opened the door and went in: "You came so early, did you find anything?"

Pi Peng raised his head and said: "Boss, I couldn't sleep, so I arrived an hour early. I did a few small experiments, and now I have excluded iron and aluminum. The chemical properties of this metal are very stable, ranging from silver, platinum,

Among the common rare metals such as titanium, the gold we extracted

There are too few metal scraps, and the dosage is not enough for a complicated experiment. Now I am going to heat it to test its melting point." Pi Peng began to heat the metal scraps. As the temperature gradually increased, the metal gradually melted. Pi Peng was very excited.

He said happily: "This metal is probably silver."

Huang Yiwei became interested: "Tell me about it."

Pi Peng said: "The melting point of silver is 950°C, and the melting point of platinum and titanium is around 1700°C. Take a look at the temperature."

Huang Yiwei looked at the temperature display and finally understood: "950.8°C, so the metal is silver."

Pi Peng said: "If this metal is a single substance, it is most likely silver. If it is an alloy, it is uncertain. The proportion of each substance in the alloy will affect the melting point, so the alloy does not have a fixed melting point."

Huang Yiwei thought for a while: "It's already very good. Deal with this place and go out with me. Let's continue to find the truth."

Huang Yiwei arranged for idle people in the team to help Peng Ying check the video and find the whereabouts of the suspect. Team Hong also sent Internet police to assist Peng Ying in checking the sky eye. Cheng Liya provided counseling to Xiao He and helped him re-check the frozen

Huang Yiwei checked the visit list from the previous day and found the four phone numbers of the locksmiths.

There was no abnormality in the first two houses, but the third house was found. Huang Yiwei took out the photo of the deceased and showed it to the locksmith, and he recognized the deceased at a glance.

He said: "I have seen this woman. About last Thursday, I helped her open the lock and change the lock cylinder."

"It's been a week, why do you still remember it so clearly?" Huang Yiwei asked.

The unlocking master blurted out: "Because she is very beautiful." After saying that, he felt something was inappropriate and explained: "Not only is she beautiful, she drives a red Audi car, which is too conspicuous. I didn't expect that she is so rich and so beautiful.

She was stingy. She agreed to pay 50 yuan to open the lock. When she arrived, she found that the lock cylinder was broken. She also said she wanted to replace the lock cylinder. I said it would cost 200 yuan to replace the lock cylinder.

She agreed. But after I changed the lock cylinder, she regretted it. I said I didn’t want the money to open the lock, and just give me the 200 yuan to change the lock cylinder. She felt that I could do it in a few minutes and it was not worth the 200 yuan.

, insisted on giving me 150. Of course I didn't want to, we had a fight, and finally gave me 180. I thought I was unlucky, so I came back."

Huang Yiwei asked: "How did she find you?"

"I posted a small advertisement in the corridor of that community, and she called me, so I went there," he said.

"Don't try to lie to me. Telling the truth will do you no harm." Huang Yiwei warned him.

He waved his hand quickly: "I dare to tell you the truth."

"Okay, let me ask you again. Since she called you, how do you know she drives a red Audi?"

He replied: "When I went there, she was sitting in the car downstairs. When I arrived, she went upstairs with me, and her daughter was also there." Huang Yiwei felt that his expression was relatively natural, except for being nervous.

There was no sign of lying, and the things described were reasonable.

Huang Yiwei said: "Stretch out your hands and let me take a look."

He was a little nervous, but he still stretched out his hands. There were thick calluses on his hands, and there were silver-white metal shavings between his fingers. Not only were there on his hands, but there were also metal shavings adsorbed on his sleeves.

Huang Yiwei said to him: "We need to collect your fingerprints and saliva."

"Why? Did something happen? I didn't do anything." He seemed to realize something and tried his best to distance himself from the relationship.

Huang Yiwei said: "How did you know that something happened to her? I never said that. Did you already know that something happened to her?"

The locksmith was really panicked: "I didn't do anything, so don't accuse me unjustly. Why did you collect my fingerprints and saliva?"

Captain Hong couldn't help it anymore: "That woman's house was robbed and she was killed. All relevant people must be sampled and investigated. If you didn't do it, what are you afraid of? Unless you feel guilty."

"What am I guilty of? What does it have to do with me? Come on, you guys check." He sat on the chair, straightened his body, and closed his eyes. "Check, check whatever you want!" He put on a show of being a dead pig and not afraid of boiling water.

Looks hot.

Captain Hong was amused by him: "Just open your mouth!" He then opened his mouth, and the policeman next to him collected his saliva. Pi Peng also collected the metal scraps from his sleeves.

After the collection was completed, Captain Hong told him: "Don't leave the local area until the case is closed. We may still need you to cooperate with the investigation."

There were many spectators gathered at the door. While watching, Huang Yiwei asked: "What are you doing between 10:00 and 12:00 on Wednesday night?"

He thought for a while and said, "I basically watch TV every night, just in the back."

Huang Yiwei looked inside and asked again: "Can anyone give you proof?"

"I don't have a wife, I live alone, and there are no witnesses. But I can prove that I didn't do it. My legs are disabled and it's inconvenient to walk. I usually don't go out at night. If I want to go out, I have to use crutches." After that, he

I pulled up the right trouser leg, and it turned out that there was a prosthetic leg inside.

He walked behind the door and took out his crutch. Huang Yiwei understood that he was telling the truth, because it was difficult for a disabled person to climb to the top of the building. Even if he did reach the top of the building, the footprints would be one deep and one shallow.

It was not consistent with the results of the on-site investigation. Huang Yiwei winked at Team Hong and signaled him to leave, and they came out together. Huang Yiwei was a little lost, and the clues seemed to be broken again, but he always felt that something was wrong, and for a while

Haven't thought of it yet.

At 4:00 p.m., Peng Ying's screening of the suspect's gait produced preliminary results. Based on the video of the suspect captured by community surveillance, Tianyan tracked the suspect's final disappearance location at the intersection of Daxi Street and Guning Road.

Huang Yiwei asked: "Captain Hong, what is this place?"

Team Hong looked at it: "There is a Xiyuan Market nearby, and further south is a cluster of bungalows. The locksmith shop we visited today is in the Xiyuan Market."

Huang Yiwei was surprised that the suspect's last place of disappearance was actually where they had been today, and the locksmith did not seem to have the conditions to commit the crime, indicating that the suspect might be someone else. Xiao Liu proposed to investigate the Xiyuan Market again.

But Team Hong believes that the large-scale investigation may alert the snake.

, it is better to conduct an unannounced investigation. Huang Yiwei was constantly weighing the pros and cons of the two ideas in his mind, and it was difficult to decide for a while. In his mind, the evidence that had not been confirmed and coherent during the entire investigation process was quickly turned around like a movie.

I can't hear other people talking at all.

Captain Hong wanted to ask Huang Yiwei what he thought, but Dai Jiaxing stopped him. It must be said that Dai Jiaxing understood Huang Yiwei more and more.

After about 5 minutes, Huang Yiwei suddenly said: "Captain Hong, bring back today's locksmith. Call him to repair the lock."
To be continued...