Chapter 63 Liang Song’s Suspicion
The criminal investigation detachment’s case analysis meeting, although the content of the discussion was serious, the style of the meeting was actually relatively relaxed.
All criminal police officers participating in the analysis meeting can put forward their own suggestions or guesses.
Of course, there must be a certain basis for making guesses.
The basis mentioned here is not necessarily evidence, as long as it is reasoning that conforms to general logic.
In homicide case analysis meetings, the medical examiner is often the first to speak.
But this time, because there was only one human skin, it was impossible for the forensic doctor to do an autopsy.
Of course there is no autopsy report.
The content of the report will not be much.
What's more, Wang Changjiang hasn't come back from vacation yet, and Shen Yan is the only one at the forensic doctor's side.
Looking at the little girl next to him, Liu Guodong coughed twice and cleared his throat: "Let me say a few words first."
All eyes were focused on Liu Guodong.
“At the current survey, a preliminary survey of the painting has been carried out, and some fingerprint information has been extracted from the frame. Lao Bai and Yang Sen are comparing it.”
“There is also human skin. We have extracted the DNA information in the system, but the comparison was not successful in the system."
Qin Yong nodded.
Compared with fingerprint comparison or even footprint comparison, blind DNA information comparison has an extremely low probability of success.
Unless there is a target person.
Just like the paternity test done by Lu Chuan and others.
Otherwise, with the current amount of information on less than 5,000 people in the Haizhou City Criminal Investigation Detachment’s DNA information database, if you want to make a successful comparison, you really have to burn incense and worship Buddha.
In any murder case, determining the identity of the deceased is the most important prerequisite.
Liu Guodong continued to report: "At this stage, we have completed the collection of fingerprint information on the oil paints, and Lu Chuan is now processing the skin."
"As for Xiao Shen, from a forensic perspective, what are the findings? "
This was Shen Yan's first time attending a case analysis meeting, and her nervous palms were already sweating: "The skin has been soaked in formalin, so it is difficult to determine the time of death of the deceased more accurately. "
< br>"But judging from the fact that DNA information can still be extracted, the time of death should not exceed one month."
This is the estimated range of death time that Shen Yan called Wang Changjiang to confirm.
Because skin soaked in formalin will lose activity within a month at most, making it difficult to extract DNA information.
Skin cells are basically completely saturated with preservatives.
Ordinary extraction methods simply cannot work.
Of course, this does not mean that there is no way to extract DNA information, but it requires some special processing.
There is really not much effective information that can be obtained from a human skin.
Qin Yong turned his attention to Sun Jun and Ren Qiang.
"The painter whose name is marked on the oil painting is called Liang Song. He is a local grassroots painter in Haizhou City. He has already made preliminary inquiries."
Sun Jun began to report on Liang Song's inquiry.
“He did not admit that the painting was painted by him. Judging from the questioning process, he should not have lied.”
Ren Qiang’s second action team is responsible for the investigation of the staff in the exhibition hall. Inquiry: "I don't get much effective information here either."
"The exhibition hall was completed on Thursday, and the painting was transported directly from Liang Song's studio by porters."
"My people are checking the video surveillance of that day, and no oil painting has been found yet. The possibility of subcontracting. "
"As for being subcontracted in the exhibition hall..."
Ren Qiang expressed some of his guesses: "The possibility is relatively small. There is surveillance in the exhibition hall. Although there is no direct surveillance on the painting involved, it is very difficult to transfer an oil painting of nearly one square meter. "It is certainly not a small painting to be able to put down a piece of human skin."
"What do other people think?"
Qin Yong looked around again. Everyone knew that at this time, as long as everyone had reasonable speculations, they could speak freely.
Zhang Hui looked around and spoke first: "I think the focus of the investigation should be on this grassroots painter Liang Song."
"He said he had never painted this painting. Then how did he explain that the painting appeared in his studio? "
"Also, when the porter of the exhibition hall went to transport the oil painting on Thursday, he didn't even take a look. "
"Just handed a painting that was not painted by me to the porter?"
"There must be something wrong with this Liang Song, these things cannot be justified at all."
Zhang Hui's speculation, It has been recognized by many people.
Qin Yong looked at Sun Jun.
He was the one who interrogated Liang Song. Since he just said that Liang Song did not lie, these questions should have logical explanations.
Sun Jun nodded: "Let me talk about Liang Song's situation."
"First, the literary and art exhibition invited him to participate in the exhibition and sent him a formal invitation letter."
“And Liang Song also responded to the invitation letter, clarifying that the painting he wanted to exhibit was called Dry Well Beside the Wheat Field.”
“We have already obtained this in the reply letter received from the exhibition hall. Verification."
"When did he give the reply?"
"At the beginning of August, August 2nd to be exact."
Sun Jun's group has obviously done a lot of work. On the conference room projection screen, a photo of the reply was displayed: "Liang Song is The painting was confirmed to be exhibited two months ago, and the forensic conclusion just now is that the owner of the human skin died no more than a month ago."
"Second, in Liang Song's studio, besides him. paintings, as well as paintings by his students.”
“I have sent people to see it on site. His studio was renovated in a warehouse in the southern suburbs. It is very large and contains more than two hundred oil paintings. .”
“Only fifty-six of them were actually painted by Liang Song.”
"Third, Liang Song was not present when the studio moved out the painting involved last Thursday. He was collecting scenery in the suburbs at the time. Two students can testify."
"Fourth, the porters moved the painting When I was painting, the painting had already been packed, and Lao Ren and I touched it. The movers at that time did not check the name of the painting, and they were not obligated to check it. "
"They just moved it, as for what they gave them. Is it the girl in the wheat waves or the dry well next to the wheat field?"
"Where is the surveillance?"
Qin Yong frowned: "Is there surveillance in the studio? Can they find out who it is? Packaging? ”
Sun Jun shook his head: "There is no monitoring. We are now investigating Liang Song's students."
While Liu Guodong's people were holding a case analysis meeting, Lu Chuan's work also entered the most difficult stage.
Fingerprint collection on skin.
Different from collecting fingerprints on paper that Lu Chuan did before, and different from collecting fingerprints on the picture frame just now, the fingerprint extraction on the skin uses reverse thinking.
Since the skin itself has sweat glands and sebaceous glands, it is very difficult to collect fingerprints on living skin.
Because the material on the surface of the living body's skin will assimilate the fingerprints covering it.
Deactivated skin, which is the situation Lu Chuan is encountering now, will be simpler in comparison.
When the murderer soaked the skin with formalin, as the preservative penetrated the cells, it also fixed the fingerprint chemicals left by the murderer on the skin.
Of course, if the other party was wearing gloves at the time, that would be a different matter.
Lu Chuan has already started to take action.
(End of this chapter)