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

Chapter 145 Windfall
Generally speaking, the possibility of falling from a building is murder is not high.

From the analysis of the probability of falling cases that have occurred, the proportion of suicide falling accounts for more than 80.00%.

The remaining 20.00%, and half of them are accidental falls.

Less than [-]% of people actually killed people by falling from buildings.

The survey at that time was done by Liu Guodong.

The woman who fell from the building had traces of being violated during her lifetime, and it was a violent violation.

This determined the nature of the case.

And all the clues are only a fingerprint and body fluid collected from the lower body of the deceased.

The quality of the collected fingerprints was very poor because of bodily fluid contamination.

Blurred photos, not very real, like a second remake.

Extracting fingerprints on human skin is the most difficult of all fingerprint extractions.

When Liu Guodong extracted his fingerprints, he used iodine fumigation.

However, due to the secretion of sweat glands and oil glands on the surface of the dead body, coupled with the interference of body fluids, the collected fingerprints are very unsatisfactory.

Of course, even so, judging by Lu Chuan's intermediate survey skills, Liu Guodong had reached his limit at that time.

At the very least, it is very powerful to be able to find this fingerprint.

The humming computer fan roared again, and the sound of keyboard tapping also rang out regularly.

In the conference room, everyone, look at me and I look at you, knowing that Lu Chuan is processing fingerprints again.

"This is... the sixth one, right?"

"Successful three, is three lives..."

What this person said may not refer to the victim, but may also refer to the murderer.

The murder suspect was caught at least indefinitely.

The current death sentence is not like before. Unless it is a major case, the impact is bad, or the subjective criminal malice is very obvious, otherwise, most of them are indefinite.

Every successful fingerprint comparison by Lu Chuan not only means that the victim has been wronged, but also means that someone has been sent to prison.

The computer was howling, howling like crazy.

It feels like a female Bodhisattva blocked by a few big men in a dead end.

The meaning of hysteria is obvious.

"The next time I suggest that the bureau hold a fingerprint battle, get a few better computers. This is too loud."

"The key is to affect our progress in comparing fingerprints..."

The processing of the fingerprints went smoothly. It took less than two hours, and the preprocessing of the fingerprints was almost over.

Looking at the increasingly clear fingerprints on the screen, Gao Wenxiang beside him flushed with excitement.

"It's almost ready...huh?"

However, Gao Wenxiang soon discovered something was wrong.

As a qualified fingerprint identification criminal policeman, although the technical gap between Gao Wenxiang and Lu Chuan is like a gap.

However, it doesn't mean that Gao Wenxiang can't do it.

On the contrary, he was also transferred from the police station as a genius by the leader back then.

A fingerprint, whether he has seen it or not, Gao Wenxiang remembers it very clearly.

And the fingerprints on Lu Chuan's screen gave Gao Wenxiang a very familiar feeling, like deja vu, but separated by a layer of window paper.

"Brother Gao... Does it sound familiar?"

Lu Chuan's feeling was stronger than Gao Wenxiang's.

Familiar fingerprints, as if you just saw them.

Gao Wenxiang nodded affirmatively: "You also feel familiar?"

Suddenly, the two of them paused.

There were only two fingerprints that the two of them had looked at together without a successful comparison.

One is the fingerprints of Zheng Bin's murder done by Lu Chuan yesterday afternoon.

The other one is the first murder fingerprint made today, and there was no match in the system.

Lu Chuan immediately operated the system and found two pre-processed fingerprints from Zheng Bin's case and this morning's case.

After the two fingerprints were processed, they were relatively clear.

"Zheng Bin!"

Gao Wenxiang could tell at a glance which fingerprint was similar to the one in the falling building case.

It was the fingerprint left on the murder weapon at the scene of Zheng Bin's murder.

When Wang Song heard Gao Wenxiang calling Zheng Bin, he immediately raised his head: "Old Gao? What's wrong?"

Yesterday afternoon, Wang Song waited hopefully for Lu Chuan's appraisal result.

Unfortunately, the comparison failed, and the target person did not leave a fingerprint sample in the fingerprint system.

"Old Wang, come quickly, we're on par! The fingerprints of the Zheng Bin case are on par!"

After two or three breaths, everyone gathered behind Lu Chuan.

Wang Song's eyes almost sunk into the screen.

"Who? Who?"

I didn't win the match yesterday, but I won the match today!

"There is no information about the other party, but the person who killed Zheng Bin and the murderer who fell from the building in Qingjian Community five years ago should be the same person."

The person who killed Zheng Bin was the murderer who fell from the building in Qingjian Community five years ago?
Wang Song's expression changed. He had heard about the case five years ago and knew it was handled by the Criminal Investigation Detachment.

"recidivist?"

"Killed the police nine years ago, and killed Jian Jian five years ago?"

Sun Hao frowned, he knew about these two cases.

They also participated in the handling of the case back then, but obviously, there was no valuable news.

Wang Song was even more gloomy.

Although fingerprint comparison shows that the murderer in the two cases is the same person, so what.

The murderer killed Zheng Bin in the mountains nine years ago, and the case has not been solved.

Five years ago, he committed a murder in the Qingjian Community, but the case is still unsolved.

Everyone chattered and discussed the two cases that year.

"Is it possible to re-investigate the case five years ago?"

"This case alone...is unlikely, but if you add Zheng Bin...you can try."

The backlog of homicide cases will never be abandoned, but the police resources invested are always limited.

Therefore, generally speaking, if there is no major clue, the homicide case will not be re-investigated.

Unless the nature of the case changes significantly.

A murderer who kills two people is actually not qualified.

There are more serial murders.

And most of them have not been solved, and I have not heard that the investigation of that case has been restarted.

Restarting the investigation is different from follow-up in the general sense. The criteria for restarting the investigation are based on the standards of new cases.

"Let's apply first. It's unlikely to be restarted, but... two days should be fine."

Lu Chuan checked the information and found that Ren Qiang was responsible for the falling from a building five years ago.

Taking advantage of the rest time, Lu Chuan called Ren Qiang.

"Is the murderer in the case five years ago the same person as the Zheng Bin case nine years ago?"

Ren Qiang was a little shocked.

In the two cases, he was in charge of the former, and Zheng Bin, the victim of the latter, was a police officer who joined him in the same class. The two had a good relationship.

"There are no further leads at this time."

Although Lu Chuan found something, it was not very useful for catching suspects.

"My fingerprint battle is over in five days. Go back and look at the dossier then."

Hanging up the phone, Ren Qiang sighed deeply.

Recalling the case five years ago, it seems like it happened just yesterday.

And Zheng Bin, at that time Zheng Bin was just about to become a father.

After sorting out his mood, Ren Qiang went to the archives room and found the files and evidence files of the falling case five years ago.

Unlike Zheng Bin who was killed in the wild, the case of falling from a building has actually made great progress.

The scope of locked suspects is relatively small.

After all, when the building fell, there were only so many people in the building.

It is not difficult to screen everyone.

Even, at that time, the entire street and people in more than a dozen nearby communities had their fingerprints and DNA information collected.

Unfortunately, the fingerprint comparison was unsuccessful.

In terms of DNA information, there has been no significant progress.

However, according to the reporting time at that time, it can be determined that the murderer should have been nearby at that time, and he did not even come out of the building.

Who on earth is it?
(End of this chapter)