Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

It was already past three in the morning when Lu Chuan left the autopsy room.

Although it was very late, the entire Criminal Investigation Brigade was still brightly lit and everyone was still busy, especially the support staff of Song Mingguang and Wang Song's groups, who had a lot of work on hand.

The scope of people being screened by Wang Song has been expanded again, and the task of cross-screening has become heavier. All personnel are busy and have no time to rest.

The situation on Song Mingguang's side is slightly better. The case has been focused on two people and relevant investigations are currently underway.

Song Mingguang's case-handling style is very steady. Generally speaking, if he finds a suspect, or a suspicious person within his sight, he will conduct a preliminary investigation on the other party in advance and will not rashly go in to investigate and search.

Lu Chuan couldn't rest either.

Lu Chuan has not yet conducted any identification or analysis on the incomplete fingerprint brought back from the crime scene.

In addition, Lu Chuan also had 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 suspect's characteristics through other methods.

Although the trace evidence analysis is still ongoing, there will definitely be no results tonight. The earliest we can get is tomorrow afternoon.

The case is progressing and everyone is busy.

In the office, Li Donglin was holding a file, and the desk was covered with information.

As the leader of the serious crime squad, Li Donglin often does not need to actually participate in the specific work of the case.

However, the direction of every case solved by the serious crime team is ultimately determined by him.

Therefore, which direction to put more energy in and which direction to use as the key to solving the case is a major test for Li Donglin.

Especially when the serious 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 also why Li Donglin attaches particular importance to the clues from Lu Chuan.

Because the on-site investigating detectives only provide technical parameters, not logical reasoning.

Compared to Song Mingguang and Wang Song, who reasoned from clues in the case, Lu Chuan was more practical and gave some suggestions based on the situation at the scene.

Moreover, Li Donglin was originally a criminal investigator in the fingerprint post, so he believed and was more certain that the crime scene could provide clues to solving the case.

"Heart? Fingers!"

The victim's left ring finger was broken, and no bone residue was found in the ashes in the stove pit at the scene, which means that the murderer must have taken the finger away.

But why did the murderer do this?

There must be some reason why he took away his ring finger, and this reason must be very important.

This is also an important basis for Li Donglin to judge that the suspect should be an acquaintance of Wang Jingya.

In most cases, murder is motivated. Those who kill for no reason and without purpose are crazy.

The murderer handled the scene very cleanly. His methods were very covert and his anti-reconnaissance awareness was very strong. It was obvious that the other party was not a madman.

Li Donglin has just looked up 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 ring finger has the least strength and is relatively the least flexible.

The ring finger on the left hand is usually the finger on which the wedding ring is worn, 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 known as the love finger.

The blood in the ring finger is the apex blood.

There are also 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 length of the thumb and little finger are generally equal.

Comparing the length of the ring finger and the index finger, it is generally believed that people whose ring finger is longer than the index finger will be more competitive in society.

Of course, this is not an absolute concept, but 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. He must have thought it had some special significance.

Just like some serial killers in the past who liked to kill women wearing red skirts.

Of course, this case should not be a serial murder case, and there are no reports of other victims so far.

Also, the heart crime suspect dug out the heart with his bare hands. Why?
Time passed quickly and it was the morning of the second day.

Lu Chuan worked overnight and achieved some results, but no decisive results were achieved.

Although the incomplete fingerprints had been identified and analyzed, as Lu Chuan expected, the target person was not matched in the system.

After all, the fingerprint was too damaged, and even though Lu Chuan tried his best, he could only mark two characteristic points.

In fact, theoretically speaking, it is impossible for any feature point of any fingerprint to be exactly the same.

That is to say, even if there is only one feature point, theoretically it should be able to match the fingerprint.

However, we can only compare the systems, and cannot make judgments in this way.

If Lu Chuan were to do the manual comparison, then by scanning the fingerprints one by one, it would be possible to find the other person.

But the problem is that there are thousands of fingerprints in the system, and Lu Chuan cannot compare them one by one.

Lu Chuan scanned three or four hundred similar fingerprints given by the system in batches, but he still couldn't make a successful match until morning.

But that doesn't mean this fingerprint is meaningless.

As long as there is a suspected criminal suspect, after collecting fingerprints of all the people, Lu Chuan can manually compare each fingerprint.

In this way, 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 in these aspects are found at the scene, then the suspect can only be identified through reasoning and investigation.

But it would be different if it had.

No matter how high the probability is that the suspect will not appear at the scene, or how well he is hiding.

If the fingerprint or DNA match is successful, then there is no way to escape.

Criminal Investigation Brigade canteen.

Lu Chuan and Song Mingguang are having breakfast together.

"Old Song, how are you doing?"

Song Mingguang took a sip of soy milk and said, "There are some clues."

"Two people were identified yesterday and the investigation is still ongoing, but the specific results will probably not be known until the afternoon."

Lu Chuan didn't expect that Su Mingguang would find a target person so quickly.

Thinking of this, he gave a suggestion: "When I went to the crime scene yesterday, I conducted a second on-site investigation and found some information. The suspect's height is about 2 meters to 1 meters."

Ok?
Song Mingguang was stunned: "Really?" (End of this chapter)