First of all, fingerprint itself is indirect evidence. It can only prove that the suspect has come, but cannot prove that the suspect has participated in the case.

Secondly, the fingerprint extraction location, extraction method, etc. may be irregular, which will make the fingerprint proof sense doubtful.

For a fingerprint, if it falls on the weapon, the proof is definitely first-class, basically locking the suspect. But if it falls on the murderer's means of transportation, the proof is second-level. When it comes to the crime scene, if it is a public space like a coffee shop, there are so many fingerprints that can be retrieved, it requires external conditions to determine which fingerprint belongs to the suspect.

DNA and other things are actually similar. Why do police like to find sperm spots so much? Why did Niu Forensic doctor so familiar with the nature of toilet paper back then? It is because normal people will not sperm spots everywhere. Once they find it, the proof is very strong.

The Criminal Department Center in Changyang City is quite professional. They are of high level and have a lot of cooperation with experts from the provincial and department. If the accumulated cases are not solved, they are likely to have been transferred to the provincial and department.

In this case, the difficulty of fingerprints in Changyang City is itself relatively high. Moreover, those they send to the provincial department and those who find and consult experts will at least be selected and have very high proof fingerprints.

Jiang Yuan is now sitting in the office of Changyang Criminal Science Center. When he scans their fingerprints, he will most likely scan out some fingerprints with low proof power - specifically referring to murder cases.

But if he didn't wipe out the murder case, his appearance would be meaningless.

Even if he solves 100 theft cases, even if the theft cases are very difficult, it will not be in the eyes of the Changyang Criminal Police Team.

There are many small cases they have not solved, maybe they cannot solve, or they may not invest resources, but in the eyes of the other party, these cases are all cases where "I can get full marks as long as I am careful."

Jiang Yuanlai has only one task, which is to solve the murder case.

Fingerprints are not something that cannot be done, but as a good start, Jiang Yuan must show his strongest combat power.

The Qingdao single-finger fingerprint analysis method of LV4 + Chongqing single-finger fingerprint analysis method of LV3 + LV5 image enhancement is also super strong, but there is no LV5 blood stain analysis + LV3 footprint + LV3 forensic clinical knowledge.

Because fingerprints and image detection are both obvious, blood stain analysis + footprints are exactly the opposite.

Of course, in Ningtai County Bureau, there may be no difference in fingerprint detection or footprints. In the past, the strongest trace detection in Ningtai County, Comrade Lao Yan's fingerprint skills were the most LV0.9.

But in Changyang City, at least there are LV3-level fingerprint experts, Jiang Yuan has seen them during the fingerprint battle.

In terms of image detection, their highest combat power may be only LV2, but when doing fingerprints, the main force must be fingerprint skills, and the image enhancement of LV5 is considered an auxiliary.

Change it to blood stain analysis + footprint.

These two skills were both obvious and 20 years ago, and they were the best of the older generation of criminal investigation experts.

But now, these two skills cannot be said to be lost, but they can only be said to be used less and less. Even if the master teaches his apprentice, he cannot help but not enough materials.

It means that if you do fingerprints, the criminal police team in Changyang City will work in teamwork and ask for experts to help, which is comparable to Jiang Yuan's strength. Normally, it may be a little worse, but in terms of murder cases, there will not be too many losses.

Jiang Yuan could not guarantee that fingerprints they could not make were made.

It can be replaced by blood stain analysis + footprints. The scene they cannot make may be a piece of cake for Jiang Yuan.

It is equivalent to fingerprint + image enhancement, Jiang Yuan has 800 points, and Changyang City Criminal Police Team formed the strongest team, which can have 700 or 750 points, or even break out to 800 points.

But in terms of blood stain analysis + footprint + forensic clinical course, Jiang Yuan still scored 800 points. The Changyang Criminal Police Team searched all over the province and formed the strongest battle group, which was only more than 400 points, and he scored 500 points.

Although the murder case is not a battle with your own family, it is meaningful to solve the accumulated cases at least be better than your own family.

Otherwise, if everyone has similar strength and the current case has not been solved, why should you solve the accumulated cases?

If you want to say it, there are fewer cases of blood stain analysis + footprints, otherwise it would not be impossible to pass on the masters.

But Jiang Yuan believes that in such a large Changyang City, there are always some perverts who think they are mavericks, and they are actually the same perverts as other mavericks.

"See if you have such a case. There are a lot of blood stains and bloody footprints on the scene, and then the scene was shot very comprehensively." Jiang Yuanluo described it.

"There are not many such direct violent crimes now." Wan Baoming said first and asked: "Forensic Jiang has more experience in this type of case?"

"You'll be more confident." Jiang Yuan said and walked towards the computer.

Wan Baoming smiled and walked over to turn on the phone, but said directly: "513 open the door and kill the murder case. Do you have a look at this first?"

A case that can be named directly is a case that is difficult to be a serious case.

Jiang Yuan asked: "What's the specific situation?"

"Let me give a brief introduction." Wan Baoming said: "Three years ago, on May 13, the victim was an elderly man living alone in a local township. At that time, someone called to copy the electricity meter. The old man opened the door and was right in front of the door. There was no dispute. He was stabbed in the chest with a knife. He died silently. When the body was discovered by the neighbor, he had been dead for more than an hour."

Wan Baoming looked at Jiang Yuan and Wei Zhenguo with a solemn expression and said, "The footprints were extracted on the scene, with a large amount of blood and half of the blood footprints. However, because of the onlookers and others, the traces at the scene were also quite chaotic. What about this case?"

"This case is too difficult." Wei Zhenguo was already screaming, afraid that Jiang Yuan would agree impulsively.

"Look at the live photos first." Jiang Yuan made way for the position and asked Wanbaoming to open the intranet.
Chapter completed!