I am the best in the world with the crime solving system

While in the mortuary, Lingyou handed over the jug and the deed to Chonglou for safekeeping.After returning to Muyuan Building, Xie Xuan expected that Chen Chaoyan would not ask Lingyou to bring these two things back for no reason, so he asked Chonglou to wrap the wine pot and the loan with silk and put them in the wooden box next to the imperial concubine's bed .

Now that Chen Chaoyan wanted it, he asked Chonglou to take it out again.

Chen Chaoyan's extraction of fingerprints at the crime scene only knew the general theory, but not the reality.Now it is such a backward era, whether she can extract the fingerprints from the flagon and the deed, she can only say that she has a try or tries her luck.

Asking Bai Shao to push her to a place by the window, holding the jug with a handkerchief, and taking advantage of the late afternoon sunlight to check it again, she took a few deep breaths at the place where fingerprints might be left.Afterwards, quickly borrowed the light to look at the place where he breathed.No, the glaze is too rough and no fingerprints show through.

Chen Chaoyan didn't give up, and continued to face the sunlight, using the magnification function of the light screen to check side by side.After failing again, she said to Chonglou: "Go to the bottom of the pan in the kitchen and scrape some ash for me. Also, prepare me a pen that has never been used."

After Chonglou left, Chen Chaoyan turned around again and told Lingquan, "Take the clay and paper and ask Wang Da how many people have touched the jug and the loan after they went to Zhou's house in the morning. But for everyone who has touched it, let them press their fingers, ten fingers, and remember to write their names under the fingerprints."

Lingquan looked at Xie Xuan.

After Xie Xuan nodded, he walked quickly.

"I want to try, can fingerprints be printed on this flagon and the deed?" Without waiting for Xie Xuan to ask, after Chen Chaoyan asked Bai Shao to bring her a box of powdered cakes or flour, she took the initiative to spread her palms and pointed Belly explained to him, "Fingerprints are the lines formed by the uneven skin above. Everyone's fingerprints are different and will hardly change. If you can swipe them on wine jugs or loan deeds, then We can directly lock the murderer."

Xie Xuan spread out his left hand, looked at the fingerprints on his fingertips, and the corners of his mouth curled up in a subtle way.Fingerprinting is another word he has never heard of, and an unheard of method to solve a case.Raising her eyes to look at the flagon and the loan in front of her, Xie Xuan didn't understand, so she asked, "Fingerprints will remain on the flagon and the loan if they don't go through the elixir?"

"Of course. Theoretically speaking, there are a large number of sweat glands and sebaceous glands on the skin of human fingers and palms. As long as a person is alive, sweat and sebum will continue to be discharged. Therefore, as long as fingers or palms When you come into contact with objects, traces will be left on the objects. Such traces are divided into obvious lines, forming lines and latent lines." Chen Chaoyan explained by endorsement, "obvious lines are lines that can be seen with the eyes, such as Fingerprints pressed with Danmu; forming patterns are fingerprints left on candles, semi-slime, etc.; latent patterns..."

Chen Chaoyan held the flagon with a handkerchief again, "This is it. There must be fingerprints on it, but they cannot be identified with the eyes. We can only use some means to make it appear."

"Originally, the best carrier for fingerprints is the murder weapon. But Zhou Zhongcai held the murder weapon firmly because of the convulsions of the corpse. The pollution is too serious, so we can only try this jug and the loan."

If the pot ashes and powdered cake or flour can really produce fingerprints, no matter whose fingerprints are, then they can be taken to the scene of the crime, where fingerprints may be left, and slowly extracted.

As for how to compare after swiping out the fingerprints... Chen Chaoyan looked at the light screen.

The highest resolution that the screens on the market can carry is 4k, but the display image of the light screen definitely exceeds 8k, even the legendary 18k of imax.Because after the light screen is zoomed in and zoomed out infinitely, the image is still super clear. It can be said that after calling it a super camera and unlimited storage, it can also be called a super zoom lens.

In order to verify her words, Chen Chaoyan called up the video of going to Zhou's house in the morning. After zooming in twice, she checked it again, hoping to find one or two missing clues.

It wasn't until Chonglou brought back the pot ashes and pen that she exited the light screen with nothing.

The big iron pot in the kitchen of the Sheriff's Mansion has not been scraped for several years.The Chonglou was powerful, and he didn't know what Chen Chaoyan wanted the pot ashes for. The pot ashes he scraped were all in large pieces or lumps, so they couldn't be used right away.Chen Chaoyan had no choice but to ask him to find another clean mortar.

Grind the pot ash into a fine powder with a stone mortar, and sieve it through a fine sieve again. Chen Chaoyan dipped a pen in the pot ash and flicked it onto the deed.Bounce back and forth several times, until the ashes of the pot spread evenly on the deed, then she took the pen and removed the excess ashes from the right to the left.

When she was cleaning the ashes from the pot, Xie Xuan was standing beside her, Chong Lou and Bai Shao were standing a little further back, all three of them watched her movements silently.

"Success!" Only half of the edge was cleaned, and two fingerprints appeared one after another. Chen Chaoyan looked up at Xie Xuan excitedly.

Xie Xuan looked at the fingerprints on the deed, and then at her bright eyes, the thought of wanting to tie her by her side unknowingly grew wildly again.Curling the corner of his mouth, Xie Xuanyan praised endlessly: "Miss Chen is really amazing!"

"It's also good luck." Chen Chaoyan's thoughts were all on the fingerprints, and he didn't pay attention to the mystery hidden in his words.After habitually humiliating herself, she looked at the light screen.

On the light screen, two fingerprints were lined up side by side, with clear lines.As long as Lingquan brings back the fingerprints of Wang Da and others, she is fully confident that she can compare them immediately. Whose fingerprints are these!

Suppressing her excitement, Chen Chaoyan confidently began to clean up the remaining pot ashes.

In the remaining pot ashes, 38 densely packed fingerprints were found.

The fingerprints were concentrated on the left and right sides of the deed, with only a few scattered in the middle.Looking at its shape, the left and right sides are holding the deed of borrowing for inspection, and the few pieces in the middle are left by writing the deed of borrowing.

It is a checking posture... Chen Chaoyan used the same method to scan out 41 fingerprints on the back of the lease.

Add up the fingerprints on the front and back, minus the 53 fingerprints that overlap and cannot be distinguished, there are still 26 fingerprints left.

The same is true for another lease.

Chen Chaoyan looked at the seventeenth horizontal and tenth vertical rows of fingerprints on the light screen, and after a moment of condensed eyes, he brushed the fingerprints of the jug with powder.The jug is pottery, and the black glaze on it is too rough.Chen Chaoyan changed the flour into pressed powder, but after failing to get fingerprints, she gave up regretfully.

Seeing her move, Xie Xuan asked, "Can't it be brushed out?"

Chen Chaoyan nodded.

Xie Xuan looked at her, "Why?"

"The surface is too rough for the powder to adhere to." Chen Chaoyan explained casually.

Xie Xuan delved into it: "Then what should I use to get it out?"

Naturally, it was a chemical method, but there were no chemicals here, and with her strength, she couldn't make these chemicals by herself.Unable to elaborate with him, Chen Chaoyan simply said, "I don't know either."

Xie Xuan looked at her deeply: "You don't know either?"

Chen Chaoyan said 'hmm', "I haven't learned this before."

Haven't learned it, or don't want to say it?After Xie Xuanjing looked at her for a few breaths, her gaze fell on the lease in her hand, "The fingerprints on the two leases together are nearly two hundred. How do you plan to compare them?"

"Although there are nearly 49 fingerprints, I can identify only [-]." Chen Chaoyan pointed to those overlapping fingerprints, "like this kind of two or three or more overlapping fingerprints, I am Unrecognizable. I can only identify this single, uncontaminated and complete fingerprint.”

Xie Xuanman asked casually: "Is it because you can't recognize it, or can't you recognize it?"

Chen Chaoyan glanced at him, "I can't recognize it."

Not to mention the fingerprint analyzers that criminal investigation departments have used for a long time, many of them can not only use image processing technology to extract the clearest fingerprints, but also use the unique characteristic points of fingerprints , draw the incomplete fingerprint completely.The identification work of overlapping multiple fingerprints like this is just a separated fingerprint that is one of the bases for drawing incomplete fingerprints.

"Who can recognize it?" Xie Xuan asked the bottom line.

Chen Chaoyan raised his eyes to look at him, and after a short pause, raised the corners of his mouth slightly, and said with a bit of mischief: "If there is no accident, no one in this world can recognize it."

In this world... Xie Xuan's pupils shrank suddenly, and then asked calmly: "Then in your world..."

Chen Chaoyan looked towards the door: "Lingquan is back!"

After Xie Xuan looked at her deeply, he also looked at the door.