Criminal Police Brigade.
The atmosphere in the conference room was rather dull. Everyone thought that the case would find a good result, but the result was unexpected.
Fingerprints found in the ventilation ducts at the crime scene were not successfully matched to anyone in the building.
"Is it possible that we missed someone? Is it possible that the other person entered and exited the building in other ways and was not captured by the surveillance?"
Sun Biao asked.
Chen Jiang shook his head.
"This is unlikely.
There are only two channels to enter the building. One is from the lobby at the main entrance. All people entering the lobby need to swipe their cards.
There is security supervision in the lobby. If the other party wants to enter without swiping the card, the possibility is not high. Of course, even if the other party does not swipe the card, it can be seen in the surveillance. However, we checked all the surveillance and everyone who entered the lobby, we Once compared. Make sure nothing is missed. ”
"The other exit is the underground parking room. There are a total of 6 elevators in the underground garage. One of the elevators is broken. There are surveillance cameras in the elevator halls of these 5 elevators, and they need to be checked in and out of the building. Scanning of license plate numbers.”
"In order to prevent anyone from being missed, we compared all the vehicles with the person captured by the surveillance camera in the elevator hall."
“Nothing is missed.”
Chen Jiang can guarantee this. All personnel entering Yuanfang Building through two formal channels have been investigated.
Not only that.
In addition to monitoring the personnel above, all internal personnel in the leasing company also conducted an investigation on the Yuanfang Building through the property company.
On the one hand, the police investigate through surveillance, and no one can fake this. On the other hand, they investigate the management of their own employees through various companies. There is no way out by comparing the two.
Everyone in the building knew about the case of Tang Meijuan jumping to her death, so when the police asked for cooperation in the investigation, everyone actively cooperated very quickly. The relevant personnel information was collected in a short period of time, and some companies even collected statistics more than once.
Something is wrong.
If Tang Meijuan really committed suicide and jumped from the building, then maybe the police would ask directly and it would be over. However, now there is a large-scale investigation of the people in the building and they often go back and forth in the building. Many people have guessed that Tang Meijuan's death may not be that simple. .
"Don't be discouraged. The fingerprints were not matched and the hair was found inside through DNA identification. Let's see if there are any clues."
Lu Chuan originally returned to the High-tech Zone Bureau, but the fingerprints here were not successfully compared, so he returned. Since the clues were not matched, he had to start from other aspects.
"How is the flood situation going?"
"No results yet."
Wang Zhaokai shook his head: "The instruments we use to test water quality here are relatively simple and cannot detect some of the subtle components in it, so we took part of it to a specialized testing institution, which will not be available until tomorrow morning. Results.”
When Lu Chuan's people went upstairs, they found a lot of water stains, about two to three hundred milliliters.
After collecting it, it exceeded 100 ml. "We need to pay close attention to the identification of water quality. At present, the fingerprint comparison has not been successful, and the DNA identification analysis will not have results until one day later. Therefore, if the water analysis can be released earlier, we can proceed to the next step earlier. ”
"Yes!"
The fingerprints were not successfully compared, so other work will continue. Tang Meijuan's personal interpersonal relationships are also being intensively investigated.
The next morning, the relevant work results were summarized again.
“Bureau Lu, let’s talk about the test results of the water first.
We detected a trace amount of saliva in the water. The DNA component of this saliva has been found, but it has been compared with the saliva of 4 Tang Meijuan. It is not the saliva component of Tang Meijuan. In other words, there was indeed another person at the front desk. , this person drank this water, and then probably vomited it on the ground. ”
This result made everyone very excited. When he first got the test result, Wang Zhaokai slapped his thigh directly.
"This test result is being compared with the test results of the hair found in the ventilation duct. After testing, the DNA information components that can be extracted show that 99.99% are. The same, that is to say, if we speculate from the DNA identification, the rooftop The channel for the second person to leave is the ventilation shaft.
Moreover, this person was definitely in contact with Tang Meijuan, and the water was definitely what he drank. ”
"Okay!"
6◇9◇Book◇Bar
This clue is important.
Although it is not necessarily possible to identify the suspect through DNA screening, this confirms the police's judgment on the nature of Tang Meijuan's death case.
Although the police currently judge that the true nature of Tang Meijuan's death may be homicide rather than suicide or accidental death, there is currently no real evidence to prove this.
All the evidence supports the police's speculation, but evidence and real proof are different.
At present, the police found another person's DNA information in the mineral water, and it is consistent with the definition of hair found in ventilation management. This is a strong indication that there was a second person on the rooftop when Tang Meijuan died.
I won’t say whether this person is a criminal suspect for the time being, but just saying that the other person tried his best to avoid the cameras and appeared on the rooftop, then Tang Meijuan’s death has nothing to do with him.
After all, if Tang Meijuan died normally, there would be no need for him to avoid surveillance cameras.
"How is the internal investigation inside the ventilation duct going?"
At that time, the people from the ventilation duct police did not go directly inside. The first reason was not to destroy some things that might be inside. Another thing on site is that it may indeed be dangerous, because according to the information learned from the property management, this ventilation duct has a length of about seven or eight meters that goes vertically up and down. If it is slippery when entering, the person may slip directly. If it goes down, the damage caused may still be relatively large.
"I applied for two pipeline robots from the above yesterday. They will arrive this morning. By then, the situation inside should be almost able to be explored."
"Okay, we need to hurry up and try to get a result this morning to detect the entire pipeline. In addition, we need to combine the building drawings on the property to determine the entrances and exits of the vents of this pipeline and all the vents. All imports and exports must be verified.”
"In addition, all vents should be inspected. If there are signs of being pried open, special inspections should be carried out."
"Yes!"(End of this chapter)