Chapter 532 Fingerprint Matching

Although there is currently insufficient information on this murderer's crime and the basis for psychological testing is insufficient, it can be basically determined that the murderer is bold, careful, very cunning, and behaves cautiously.

From the fact that the other party used two iron plates to advance alternately when leaving the grass area to prevent leaving footprints, it can be seen that the other party must have considered every detail before committing the crime.

How could such a cautious person get caught for something else?

"In addition, we also extracted some fingerprint information from the driver's seat, Vice Captain Wang Kun."

Chen Yan looked at Wang Kun: "These fingerprints were found on the seat adjustment iron rod. The fingerprints are superimposed. It is not yet certain that they were left by the driver personally, nor whether there are fingerprints left by the murderer."

"Please also ask the technicians to peel it off as soon as possible, and then continue to compare it in the fingerprint database."

"Yes, don't worry, Team Leader Chen, the results will come out tonight!"

Since Wang Kun had a guaranteed ticket, Chen Yan was relieved.

The first 72 hours of handling a case are the most valuable.

The sooner clues are extracted, the greater the chance of solving the case.

"Fourth is the soil we extracted from the driver's seat mat, which needs to be tested as soon as possible."

Mud, footprints, and fingerprints are all the clues Chen Yan found at the scene.

Needless to say, the footprints and fingerprints may directly point to the identity of the murderer.

But why mud is an important clue? This is because the driving position of an ordinary taxi driver is unlikely to have mud.

Taxi drivers sit in their cars all day and are unlikely to have mud on their feet.

On the other hand, if there is dirt on the floor mat of the driver's seat of the taxi, because Li Yansong's taxi has a manual transmission, he often presses the brakes, and dust will fly up after the clutch is released.

The possibility of Li Yansong driving in this environment is relatively small.

And judging from the situation at the scene, Li Yansong's taxi was well maintained and very clean inside, which shows that Li Yansong himself is a tidy person.

How could such a person let dirt get on the floor mat of his driver's seat?

So, who left this dirt?

Also, there is really no soil in the cement factory area.

Therefore, it is impossible for the murderer to bring dirt into the car at the cement factory.

And the two iron plates found in the crushing can.

Personnel from the Shen City Detective Team had collected information on the iron plate, and as Chen Yan expected, no fingerprints were found on it.

The murderer must have been wearing gloves when he was cleaning up traces in the car, and he obviously didn't take them off when he left.

There were no fingerprints of the murderer on the iron plate.

However, technicians found a trace of fiber-like material on the edge of the iron plate.

"The thread-like objects found on the iron plate were most likely left by the murderer when he used the iron plate to cross the grass."

"It may be some fiber components left when gloves or trouser legs are scratched. This should be tested as soon as possible."

The relevant work has been arranged. Chen Yan looked at Wang Fenglei.

Wang Fenglei straightened his back: "Comrades, this taxi murder case is the closest opportunity we have to get away from the murderer."

"However, it may be the only chance!"

Wang Fenglei's words are not alarmist. The murderer of the serial case has not committed a crime in the past ten years. No one can guarantee when he will commit a crime next, or whether he will never commit a crime after 10 years.

"So, everyone must cheer up and finish the battle!"

"The meeting is over!"

The case analysis meeting ended at 11:30.

canteen.

After a busy day, no one had eaten.

"Team Leader Chen, come and try the canteen of our Shen City Detective Team. How does it taste?"

Wang Fenglei personally served Chen Yan some food.

"Thank you, Captain Wang. I'll do it myself."

"What's Team Wang? I'm a few years older than you. Just call me Brother Wang."

At this time, Wang Fenglei didn't have the airs of the deputy captain of the Liao Provincial Detective Brigade, and his attitude was very kind.

"This time, our Shen City Detective Team owes you a favor."

"Brother Wang, you're welcome. I just helped a little. Even if I'm not here, these clues will be discovered sooner or later."

Wang Fenglei shook his head.

Discover?

hehe.

The four serial cases fifteen years ago, although the time and place of the crimes were different, the scenes were basically the same.

Four times, who could have thought of the clues buried under the victim's blood?

Some things may seem simple to you once you know them, but when you don't know them, you really can't think of them.

Moreover, even Chen Yan didn't notice it at first.

If Chen Yan hadn't discovered that the driver's seat had been adjusted and guessed that the murderer had driven a taxi, he would not have thought that there would be clues in the victim's blood.

"Brother Chen, please stop being modest. With you on this case, I feel much more at ease."

Wang Fenglei was telling the truth, and the statement made Wang Fenglei feel more at ease in his heart.

Although Chen Yan has not been in the police for a long time, only two years, Chen Yan has handled many cases.

Whether it's a case handled by the Liao Provincial Detective Brigade or a case handled by the ninth detective team of the Assistance Corps, they must be in their forties.

So far, there is no unsolved case.

Moreover, as far as Wang Fenglei knew, Chen Yan had solved two or three old cases in Liancheng Detective Team.

It's an old case that, to be honest, no one wants to touch.

Sometimes, if the case is solved, it will not be liked by others, and if it is not solved, it will not be liked by others.

Why do you say that?

It's very simple. If the case is solved, what do the people who handled the case think?

The old case was solved as soon as you came here. We haven't solved the case for so long from then to now. Is it because we are incompetent?

Things that offend people for nothing.

The case has not been solved, it is simpler, there is no need to worry about the porcelain work.

It's just like Chen Yan, who wears personal first-class and special-class merit medals on his body, loving whoever he loves.

And no one can compare with Chen Yan.

In everyone's opinion, it is necessary for Chen Yan to be promoted.

Sooner or later you have to leave, sooner or later you have to become a leader, who has nothing to do to get into trouble.

Therefore, even though Chen Yan had only been in the police for two years and became the deputy captain of the Liancheng Detective Team at the age of 24, this was the reason why no one said no.

If you have the ability, go and get a special merit.

In the detective system, everyone is ranked in terms of seniority when they are all the same.

As for Chen Yan, who came up through meritorious service, others could just calmly give way.

"Team Wang, Team Leader Chen, the removal of footprints and fingerprints is complete!"

The two of them had just finished eating when the head of the technical team trotted over to report.

Finished stripping?

Chen Yan and Wang Fenglei looked at each other and put down their chopsticks. At this time, eating was not as important as handling the case.

In the conference room, people from the technical department began to report.

"We extracted three sets of fingerprints on the taxi driver's seat adjustment iron."

On the projection, it is these fingerprint images.

"After stripping, a total of 5 sets of fingerprints were extracted."

"However, after comparing the fingerprints of the victim Li Yansong and another day shift driver, it was found that all five sets of fingerprints belonged to these two people."

"Preliminary judgment shows that the murderer did not leave any fingerprint information."

Chen Yan and Wang Fenglei listened to the report attentively, with ugly expressions on their faces.

Although the two of them had long expected that the murderer would not make such a stupid mistake carelessly, they were still unwilling to do so.

However, the fingerprints are gone, and there are still shoe prints!

I hope this thread will not be disconnected, otherwise...