The relevant information was quickly reported to Lu Chuan.
Fingerprints...
Lu Chuan thought for a while: "As for the fingerprint situation, please contact the property management company first and see if the property management company has hired maintenance workers to repair these pipes. No matter when it was, whether it was recently, or twice in the past year, It doesn’t matter what time of year it is, as long as they check the situation.”
Ten minutes later.
Wang Zhaokai came to report: "Three months ago, the property management company had people inspect this ventilation duct. I have asked people to collect the fingerprint information of the people who inspected the ventilation duct at that time, as well as the DNA information to see if it can be compared with what we found. Right.”
"Okay, if you can rule it out, do it."
Now the investigation of the entire case has fallen into a dead end. None of the clues discovered so far can more directly identify the suspect than the fingerprints and hair found in the ventilation duct.
But just as Lu Chuan was worried, if there were other people in the pipeline, such as the repairman in front of the property, then there is a high possibility that the other person would leave fingerprints inside.
The inspection on the ventilation duct also soon yielded results.
The ventilation duct where people were found to be entering and leaving the building is the main ventilation duct of the entire building and connects all the rooms below the ventilation duct.
This problem was discovered during the investigation, which means that the ventilation buttons in all rooms need to be searched.
"The vents in the office should be relatively small. Can they accommodate one person in and out? I think we need to check the ventilation ducts again. There must be some larger and some smaller at the same door."
Wang Zhaokai didn't think it was necessary. He had also observed in these offices that the vents were relatively small.
Even so, the workload is relatively large, and the duct robot travels relatively slowly. According to Lu Chuan's requirements, the duct robot must screen all ventilation ducts that can allow people to enter and exit. This work is estimated to not be enough. It may not be completed in a day or so.
At the same time, the investigation centered on Tang Meijuan is also gradually being carried out.
The engineering company where Tang Meijuan works.
"Tang Meijuan has been working in the company for a long time and is a veteran figure. Although he is not old, when our company was established, he was in the bungalow when our company was not yet working in the Yuanfang Building. He is someone our boss trusts very much.”
"Tang Meijuan is usually a low-key person and gets along well with her colleagues. However, I don't know Tang Meijuan very well because I often go out and she is the cashier. We basically have no contact and only met during dinner parties."< br>
"I am the accountant and they are the cashier. We have been working together for a long time, but I was later. When the engineering company was relatively small, it was not very big. At that time, he was the only accountant, shouldering the responsibility of us. The two work well together, and she is more easy-going.”
In the engineering company, Wang Zhaokai sent someone to learn everything about Tang Meijuan in detail.
"Do you know if Tang Meijuan has a boyfriend or a close male friend?" "I haven't heard of this, and I don't know much about it, but she probably doesn't have a boyfriend. We usually go out to watch movies and eat, but we don't see her either. Communicate more and have more contact with other people of the opposite sex.”
"How is the company's recent engineering and cabling situation and revenue situation?"
"It's good. Our company has taken on several big projects this year, and the profits are relatively good. The company should have made a lot of money in the past two years. Otherwise, we wouldn't be able to move from that bungalow to the Yuanfang Building. The company is now developing We have grown a lot. We used to have very few people, but now the office is basically full, but we usually work outside and don’t usually work in the building.”
I learned from the engineering company that the situation about Tang Meijuan is not particularly special. Tang Meijuan is usually kind and has a good relationship with everyone. I have never heard of her having any grudges with anyone, and I have not heard of her financially. What's wrong.
In the afternoon of the same day, the police found the friend who was in contact with Tang Meijuan on the day of her suicide, and the two met to have dinner in the evening.
"I didn't find anything unusual. Meijuan's tone was no different from usual when she called me, and we also discussed for a long time what to eat at night. She couldn't commit suicide. If she wanted to commit suicide, she wouldn't. Promise me to go out with you at night, and she won’t discuss what to eat for so long.”
"Then do you know if she has any friends, or has she done something special recently, and has she mentioned it to you?"
"Friend... Meijuan has a relatively introverted personality. He is usually low-key and doesn't like to talk much. As far as I know, some of the friends we often come in contact with are all college classmates, but everyone is busy with work and it is difficult to get together. When we are together, sometimes the stars come out in pairs to have a meal or sing songs.”
"Meijuan doesn't have any friends of the opposite sex except for classmates. He had a boyfriend before, but it was only for a long time. He seemed to have broken up two years ago. I haven't heard of him having any boyfriends since then... …other anomalies…”
"Oh, by the way, when I went out for dinner with Meijuan last week, she asked me about a BMW car. She said she wanted to buy a car and asked me which car has better performance, BMW or Audi?"
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Buy a car?
Sun Biao asked: "Has Tang Meijuan bought a car before? Are you talking about buying a new car or buying a car for the first time?"
"It was the first time she bought a car. She had taken the driver's license test when she was in college, but then she started working and her salary was not very high, so she never bought a car. She didn't even buy a house, she always rented a house, so that time I He also told him, I said if you want to have money, buy a house first.”
The girl paused: "Oh, by the way, I remembered it. When it came to the house, she said that she would have a house by the end of this year. She would buy a car first. She saw a classmate of ours before. The class beauty is currently unemployed, married to an old man, and drives a red BMW, which she always shows off at our gatherings.”
After recording the relevant information, I asked some other questions about Tang Meijuan’s personal life habits.
At the same time, the fingerprint check was finally confirmed.
Several fingerprints found in the ventilation duct were all those of the worker who came for maintenance three months ago.
The clue of fingerprints ends here, including the several fingerprints found by the pipeline robot in the ventilation ducts, which also prove the pipeline maintenance workers. (End of chapter)