Genius remembers in a second [Aishang Novel Network biquge.info] to provide you with wonderful novels to read.

Xiao Yu'er said: "This necklace is in the package of the Zheng shopkeeper, but in fact, the Zheng shopkeeper is not the murderer of Mrs. Chen at all, and this necklace is not Zheng the shopkeeper put it in his package, the most likely, it was put in by the murderer himself, before Huitong was not killed last night, I just suspected that there was a problem in it, so I did not test this necklace, this morning after Xu Song was killed, I thought of this necklace, and then on the necklace appeared human fingerprints!" ”

"Refers to ...... Tattooed fingerprints? Chen Yun repeated it, but he still didn't understand the meaning.

"What a person touches with his hands will leave his finger prints on the things. This kind of handprint can be detected. And everyone's handprints have their own characteristics, and no two people's handprints in this world will be exactly the same! ”

When they heard him say this, they looked at each other and did not know what to do.

Although ancient China had a tradition of stamping handprints as a certificate for a long time, the ancients had a vague understanding of the uniqueness of handprints, and did not realize that handprints were unique and that each person's handprints had their own characteristics, so the ancients did not use handprints to screen individuals, nor did they use handprints to detect cases, so they did not understand what Xiao Yuer said.

Of course, Xiao Yuer knows that human beings recognize the uniqueness of fingerprints, and it has a history of more than 100 years, he believes in a word, facts speak louder than words, without saying a word, he took out a box of ink from the forensic physical evidence investigation box, asked the abbot to bring a stack of white paper, and first glued the ink to take his ten fingerprints, and then said: "The people we are here, everyone's fingerprints are different, if you don't believe it, you can press your fingerprints, and then compare them to know!" ”

Everyone couldn't react for a while, and the first one was naturally Mr. Bao, who pressed Indonesia and printed his fingerprints on rice paper.

Xiao Yuer explained the basic knowledge of fingerprint identification. It is nothing more than the type of fingerprints, the bifurcation point of each line, the position of the junction point, the position of the breakpoint of the line and other significant characteristics, everyone listened to his analysis, and then carefully identified the fingerprints of the two people, and they were really different from each other, even if a person's ten fingerprints were completely different.

Now everyone is interested, and they have pressed their fingerprints for comparison, the same. All of them have different fingerprints. And the fingerprint of the same finger of each person, no matter how many times you press it, the fingerprint is exactly the same every time.

Xiao Yu'er waited for everyone to have a general understanding of the stability and identity of fingerprints, and then said: "There are sweat glands on human fingers, which will constantly secrete oil and water, so after people's fingers are pressed on objects, fingerprints will be left, although this kind of fingerprints are generally invisible to the naked eye. But with a special tool, it can be detected. Look! ”

After that, Xiao Yu'er wiped the side of his nose with his right index finger and pressed it on the white paper. Then blow with incense ash, and gently brush back and forth with a rabbit pen in the place that had been pressed just now, and a black and gray fingerprint suddenly appeared.

Xiao Yu'er pointed to the fingerprint of his right index finger among the ten fingerprints he had just extracted with ink: "These are all the fingerprints of my index finger, you can compare them to see if they are the same." ”

And all the people came together. Carefully inspected one by one, and sure enough, the pattern of the two fingerprints. The bifurcation, convergence, and breakpoint positions are all exactly the same, and they are all amazed.

Xiao Yu'er said: "I told you just now, not to show off anything, but to let everyone know that everyone's fingerprints are different, and after pressing on an object, they will leave their own unique fingerprints." ”

He pointed to the pearl necklace, and then said: "In order to frame the Zheng shopkeeper, the murderer took advantage of the chaos to stuff this necklace into the small package of the Zheng shopkeeper. But it will leave the fingerprints of the murderer! ”

The explanation and test just now have convinced everyone that the owner of the fingerprint can be identified based on the fingerprint.

Shopkeeper Zheng had the fastest mouth, and said first: "Little brother, if you sweep it with the little stick you just now, won't you be able to show your fingerprints?" ”

"Exactly!" Xiao Yu'er said, "When I was testing in the wing room just now, I had already swept the necklace once and extracted a few fingerprints, after comparison, in addition to Mrs. Chen's own fingerprints, one of them was Zhang Gongzi's!" ”

Zhang Yu was already stunned by the magical trick-like performance just now, just now everyone was scrambling to check the fingerprints, only he and Qiu Ju stayed aside and did not participate, at this moment after hearing this, he sneered: "I didn't press my fingerprints just now, how did you extract my fingerprints?" ”

Xiao Yu'er pointed to the cup on the table: "Do you remember this cup?" Flasks and glasses that we drank together? I swiped it with this brush and your fingerprints appeared. ”

Xiao Yu'er took out a small piece of paper with transparent glue on it from his arms, and a fingerprint appeared on it, and he continued: "This is your fingerprint that I took from that cup, and I compared this fingerprint with the fingerprint on the pearl necklace, which is exactly the same." If Zhang Gongzi doesn't believe it, we can test it again, I only extracted the fingerprints on a few pearls on the necklace, and most of them have not been scanned, let's extract them once, and then compare them with your fingerprints to see if they match, what does Zhang Gongzi think? ”

"This ...... I don't bother to pay attention to your tricks! ”

"Haha, Zhang Gongzi is scared? You must have never touched Mrs. Chen's necklace before, may I ask, how did your fingerprints appear on the necklace? ”

"Who's scared? I'm just too lazy to pay attention to your tricks, who knows what the hell you're up to! Zhang Yuwu argued to himself, but his defense was obviously pale and weak. Qiu Ju's body had begun to tremble slightly.

Xiao Yu'er said: "Trick? Hehe, when it comes to tricks, none of us here can play you Zhang Gongzi. You can turn a string of pearl necklaces into a package of Zheng's shopkeeper empty-handed, this trick, we don't know. ”

"I don't know what you're talking about!" Zhang Yu said with a twinkle in his eyes.

"Don't know? Let's analyze it and find out, this necklace Mrs. Chen has already said that it is her family heirloom treasure that never leaves her, so it can only be that after the murderer killed her, he snatched the necklace, and later stuffed the necklace into the package of Zheng's shopkeeper to frame her. Therefore, the person who stuffed the necklace into the package of Zheng's shopkeeper is the murderer, everyone, is this reasoning valid? ”

Except for Zhang Yu and Qiu Ju, the rest of the people nodded.

"Okay, let's analyze who stuffed this necklace into Shopkeeper Zheng's package. It has been verified just now that Mrs. Chen was killed about half an hour after dinner, and since then, the necklace has been in the murderer's hands, and at that time, the shopkeeper Zheng and the old coachman have been sleeping in the wing room and have never left, so the murderer has no chance to frame him. Until Qiu Ju shouted that Mrs. Chen was hanged, everyone rushed to the toilet, and after arriving at the toilet, until the body was carried to the Daxiong Treasure Palace, and then searched in Zheng's shopkeeper's room, everyone was together for a while, and no one left during this time, am I right? ”

Everyone looked at each other and nodded. (To be continued......)