It was already past three in the morning when Lu Chuan left the anatomy room.
Although it is very late, the entire criminal investigation detachment is still brightly lit and everyone is still busy, especially the support staff of Song Mingguang and Wang Song, who have a lot of work on their hands.
The scope of personnel investigated by Wang Song has been expanded, and the task of cross-screening is even heavier. All personnel are busy and cannot rest for a moment.
The situation on Song Mingguang's side is slightly better. The two people who have been focused on are currently undergoing relevant investigations.
Song Mingguang's case-handling style is very prudent. Under normal circumstances, if he finds a suspect, or a suspicious person within sight, he will conduct a thorough investigation of the other party in advance, and I won't go there rashly to investigate.
Lu Chuan couldn't rest either.
Lu Chuan has not yet conducted identification and analysis on the broken fingerprint brought back from the crime scene.
In addition, Lu Chuan also needs to restore and calculate some details of the scene.
Although no traces of the suspect were found at the scene, Lu Chuan still made a rough inference about the characteristics of the relevant suspects through other methods.
Although the trace evidence analysis is continuing, the results will definitely not be available tonight, and it will not be until tomorrow afternoon at the earliest.
The case is progressing and everyone is busy.
In the office, Li Donglin held the file and the table was covered with information.
As the leader of the serious crime team, Li Donglin often does not need to actually participate in the specific work of the case.
But the direction of each case solved by the Crime Unit is ultimately determined by his layout.
So which direction to invest more energy in and which direction is the key point of case investigation is a major test for Li Donglin.
Especially when the crime squad had just begun to intervene in the case and no effective clues had been formed, it was very difficult for Li Donglin to make any judgment.
This is why Li Donglin pays special attention to Lu Chuan's clues.
Because the investigating police officers gave technical parameters instead of logical reasoning.
Compared with Song Mingguang and Wang Song, in terms of reasoning from the clues of the case, Lu Chuan was very down-to-earth and gave some suggestions based on some situations at the scene.
Furthermore, Li Donglin was originally a detective at the Fingerprint Post, so he also believed and was more certain about the clues that the crime scene could bring to the investigation of the case.
"Heart? Fingers!"
The victim's left ring finger was severed, and no bone residue was found in the ashes in the stove pit at the scene. This means that the murderer should have removed this finger. Gone.
But why did the murderer do this?
There must be some reason why he took away his ring finger, and this reason is very important.
This is also an important basis for Li Donglin’s judgment that the suspect should be an acquaintance of Wang Jingya.
In most cases, there is a motive for killing, and those who kill for no reason or purpose are madmen.
The murderer on the scene was dealt with very cleanly, it can be said that the method was very covert, and the awareness of anti-reconnaissance was very strong. It was obvious that the other party was not a madman.
Li Donglin just checked a lot of information about the ring finger on the Internet.
There is actually a difference between the ring finger of the left hand and the ring finger of the right hand.
Among the five fingers of a person, the strength of the ring finger is the smallest, and it is relatively the least flexible finger.
The ring finger of the left hand is usually the finger used to wear wedding rings, so it is also called the ring finger.
In addition, the ring finger of the left hand is closest to the heart, so the ring finger of the left hand is also called the love finger.
The blood on the ring finger is the apex blood.
In addition, there are some scientific research reports on the length of the ring finger. The length of each finger of a person is not fixed. Generally speaking, the middle finger is the longest, and the lengths of the thumb and little finger are generally equal.
When comparing the lengths of the ring finger and the index finger, it is generally believed that people with a longer ring finger than the index finger will be more competitive in society.
Of course this is not an absolute concept, just an empirical judgment based on relative data.
The murderer cut off Wang Jingya’s left ring finger and took it away from the scene. It must have a particularly important meaning for him.
Just like some serial murder cases in the past, they like to kill women wearing red skirts.
Of course, this case should not be a serial murder case, and there are currently no reports of other victims.
Also, the heart suspect dug out the heart with his bare hands. What was the purpose of this?
Time passed quickly, and it was the morning of the second day.
Lu Chuan's side worked overnight and achieved some results, but no decisive results emerged.
Although the broken fingerprints have been analyzed for identification, as Lu Chuan expected, the target person was not found in the system.
After all, this fingerprint was too damaged. Even though Lu Chuan tried his best, he could only mark two characteristic points.
In fact, theoretically speaking, no feature point of any fingerprint can be exactly the same.
In other words, even if there is one feature point, theoretically speaking, it should be able to match the fingerprint.
But we can only compare the systems and cannot make such judgments.
If Lu Chuan did the manual comparison, it would still be possible to find the other party if the fingerprints were swiped down one by one.
But the problem is that there are thousands of fingerprints in the system, and it is impossible for Lu Chuan to compare them one by one.
As for the similar fingerprints given by the system, Lu Chuan scanned three to four hundred of them in batches. Even until morning, the comparison was still unsuccessful.
But this does not mean that this fingerprint is meaningless.
As long as there is suspicion of a criminal suspect, after collecting fingerprints from all persons, Lu Chuan can manually compare each fingerprint.
In this case, it is possible to directly identify the suspect.
This is the power of modern fingerprint criminal investigation technology and DNA verification technology.
If no clues from these aspects are found at the scene, the suspect can only be identified based on reasoning and investigation.
But it would be different if there were.
No matter how unlikely the suspect is to appear at the scene, or how well the other party hides it.
If the fingerprint or DNA comparison is successful, you can't run away.
Criminal Investigation Detachment Canteen.
Lu Chuan and Song Mingguang were having breakfast together.
"Old Song, how are you doing over there?"
Song Mingguang took a sip of soy milk: "I have some clues."
"We locked two people yesterday , It is still under investigation, but the specific results are not expected to be released until the afternoon."
Lu Chuan did not expect that Su Mingguang would find the target person so quickly.
Thinking of this, he gave a suggestion: "Yesterday, when I went to the crime scene, I conducted a second on-site investigation and found out some things. The height of the suspect is about 1.65 meters to 1.7 meters."< br>
Huh?
Song Mingguang was stunned: "Really?" (End of this chapter)