novice forensic medicine

Chapter 341 Handwriting Identification Expert
Zhou Ning's words made everyone quiet, and Da Zhao nodded after thinking about it.

"What Zhou Xiaozhou said makes sense. Generally, people who rob or kidnap people will definitely search for valuables on the hostages. After all, they are for the purpose of robbing money, but this person can give up such a precious golden lock, which is extraordinary. .”

Zhou Xiaozhou glanced at the note and looked at Xu Dayuan.

"In the 2000 kidnapping case in 2.3 and the 2004 kidnapping case in 4.14, I hope that the letters sent by the kidnappers can be sent for analysis to see if I can find fingerprints or residues. The extraction method that Sister Cui used last time can also be used on paper. Gathering, we now need to mine all the points that can be viewed.

In addition, who were the people who received the report on the 4.14 case?Which brigade went there?Who has access to the evidence?We will not be involved in these. Now I want to know whether there are any similarities in the letter notes of the two cases. Can I find a handwriting expert to analyze it? "

Xu Dayuan frowned, looked at Zhou Ning and nodded.

"Find the experts yourself. If you really can't, ask Director Sun. Look for the expert he compared with last time. As for the investigation of social relations between Chen Gang, Zhu Yantao, Zhu Guotai, and Fang Yue, and the police involved in the 4.14 case The investigation, I will do it here.

I want to get your criminal image as soon as possible, no matter in terms of murder weapon or behavior habits, etc., just tell me directly what you think of, there is no need to verify whether the direction is wrong, we will verify everything through actual investigation.

Liu Yufei and Da Zhao went to Zhu Yantao's place. One was to find the letter, and the other had better bring him. "

Zhou Ning didn't refuse. In fact, he didn't want to disturb Zhu Yantao. After all, the old man has been immersed in the grief of losing his child for so many years, and he has no clue yet. Excessive disturbance will make him emotionally fluctuate. If you want to investigate carefully, you must have that letter.

With a sigh, Zhou Ning nodded towards Da Zhao.

"Go ahead, fat man, you are familiar with it."

Zhou Ning didn't ask too much, Liu Yufei had already grabbed his coat, and Da Zhao clasped his hands together towards Liu Yufei.

"Sister Fei, can we go change into casual clothes?"

Liu Yufei glanced at Da Zhao, Xiaobai and Xiao Zeng moved sideways subconsciously, waiting for Liu Yufei's roar, but Liu Yufei didn't say anything, just carrying the police jacket.

"Come on, go to the front building and I'll change into casual clothes, will you drive or should I drive?"

Big Zhao grinned.

"How can I make you tired, of course I will drive, Zhou Xiaozhou will lend me the car."

Zhou Ning didn't say anything else, and threw the car keys to Da Zhao.

The two left, and Liu Yongxin bumped into Zhou Ning.

"Where does this kid sing?"

Zhou Ning looked at the direction of the door, Zhou Ning understood Da Zhao's arrangement, and the arrangement was quite careful.

"Zhu Yantao left Qindao just because he didn't want to be disturbed. He wore a police uniform and drove a police car. There must be a lot of discussion among the people around him. This will prevent some interested people from finding out. Now we can only wait until Da Zhao gets the letter back. Then compare the handwriting."

Liu Yongxin poked Zhou Ning.

"Don't waste your time, call Director Sun and ask if the handwriting expert is free, and take it directly, so that there will be no delay on both sides."

Zhou Ning shook his head and called Xia Momo.

"Mr. Xia, are you at Qin University? I heard from you last time that you know a handwriting identification expert. I don't know if it's from Qindao or the provincial capital?"

"Can't you be polite?"

Zhou Ning was taken aback for a moment, and after thinking about it, he felt that he was a little impolite.

"Sorry, I was a little anxious and didn't pay attention to my tone."

"Forget it, if you're being polite, it's someone you're not familiar with. The expert I'm talking about is my father's friend. He used to work in the judicial appraisal center in the provincial capital. After retiring, he returned to Qindao. If you have anything to appraise Yes, I can ask him if he has time."

Hearing that he was Father Xia's friend, Zhou Ning paused for a moment. After all, Zhou Ning was still apologetic for his doubts about Father Xia.

"I'm a little embarrassed, but please contact me. Da Zhao and the others have gone to get the comparison object. Even if they get it back, it will take night. Why don't you make an appointment with an expert to come over and analyze it tomorrow morning?"

"Got it, I have an appointment to call you."

Nov. 2012, 6

Zhou Ning came to the office early in the morning, opened the door and came in and saw what Da Zhao and Liu Yufei were talking about. Seeing Zhou Ning, Da Zhao looked excited.

"Zhou Xiaozhou, you are here, I have good news."

Zhou Ning looked puzzled. They brought Zhu Yantao back last night, and Da Zhao went to put the fat man to rest. He didn't talk about anything that night. At this time, he said there was good news. Could it be that there was something found in the threat letter and note?
"What did Sister Cui find?"

Da Zhao rubbed his nose, grinned and handed over a report.

"Okay, I won't play charades with you anymore. Guessing and guessing, I was always the one who was injured. Sister Cui is too good. He extracted a lot of fingerprints on the paper. After fumigation, although the materials on the two papers were different, it was found a special problem.

On the two pieces of paper, I found a few special marks. The paper was partially wrinkled, and the marks were similar to fingerprints, but the fingerprints were not clear. The eldest sister said that these were marks left by wet fingers. She tested the local , found sodium chloride and potassium, magnesium, calcium, lactic acid, urea nitrogen, etc. "

Zhou Ning quickly took the report, read it carefully, and then looked at another photo of the threatening letter. From a slightly tilted angle, he could indeed see traces of curls and folds on both the note and the letter.

"The eldest sister said that according to the composition analysis, there is sweat in it, but the residual amount is so large, she is a little uncertain."

Zhou Ning stared at the report and these photos, and after thinking for a long time, Liu Yufei hurried over.

"Director Zhou, what do you think of? Tell us about it."

At this time the door opened, Xu Dayuan and Liu Yongxin walked in quickly, seeing Zhou Ning's expression, he was a little confused, Da Zhao quickly explained, Xu Dayuan was smart and waved his hand towards Liu Yufei.

"Don't disturb him, let Zhu Yantao go upstairs to the conference room later, we'll go there and chat."

Zhou Ning raised his head at this time and looked at Liu Yongxin.

"One of these two cases occurred in Qidong and the other in Qindao. There is no overlap in terms of the investigators, and one is on the 29th of the twelfth lunar month, and the other is on April 4th. They are not very hot seasons, but there is a These sweat-soaked fingerprints are the same."

Liu Yongxin was also interested, looking at the two photos.

"You mean, the murderer is the only person who can touch two pieces of paper at the same time, and this person is always sweating profusely at any time, no, maybe only the hands are constantly sweating, which exceeds the normal amount of ordinary people, isn't that Hyperhidrosis?"

Zhou Ning nodded.

"If it is not secondary hyperhidrosis caused by a special disease, then the general patient's hyperhidrosis will improve after the age of 25."

Xu Dayuan blinked, as if he didn't understand. After all, such a disease is not common.

"What do you mean, to be clear, this murderer is sick? Or, Zhou Xiaozhou has the result of portraying a criminal image?"

Zhou Ning smiled, Xu Dayuan was always anxious.

"Xu Bureau, don't worry, wait for Teacher Xia to come over in a while, she will pick up the handwriting identification expert, let the expert take a look, do you need the original paper for note analysis, if not, I will ask Sister Cui to do a detailed analysis of the materials, after all now Don't dare to destroy the evidence."

Xu Dayuan nodded, he understood what Zhou Ning said.

"Then wait a minute, but it is a major breakthrough to find the same sweat marks on two pieces of paper, but haven't you searched the fingerprint database?"

Da Zhao shook his head.

"The extracted fingerprints are all incomplete. This can be compared and screened. Searching with this alone will not work."

Xu Dayuan sighed, and at the same time the door was opened, and Xia Momo poked her head in. She was obviously a little surprised to see so many people.

"Miss Xia, you are here, hurry up and come in!"

Xu Dayuan waved his hands enthusiastically, Xia Momo opened the door with a smile, stepped aside and stretched out his hand to the back, a white-haired old man walked in, about the same height as Xia Momo, smiling and looking very kind.

"Mr. Hu, please. This is Bureau Xu from the Qindao Municipal Bureau. This is Forensic Doctor Liu from our laboratory. This is Director Zhou Ningzhou from the Second Division of Forensic Medicine in the Technology Department. He is the one who asked me to invite you over."

After entering the door, Xia Momo introduced to the old man, and of course to everyone, this old man Hu is an absolute technical school, and he is doing handwriting identification in the judicial identification center in the provincial capital.

Xu Dayuan felt that he had found a treasure, and rubbed his hands happily, but he knew that he was not smooth enough to speak, so he took Da Zhao's collar and pushed him in front of Mr. Hu.

Da Zhao was a little speechless, and hugged Hu Lao's arm.

"Hello Mr. Hu, would you like to take a rest, or find a quieter place for you? I'm a little embarrassed to ask you to come up for appraisal."

Da Zhao smiled awkwardly, amused Mr. Hu, and patted Da Zhao Yuan's rolling stomach.

"This fat boy can talk, I'm not that hypocritical, and I'm free, I can do an appraisal, and I feel that I'm not a waste waiting to die, I'm very happy, Xiao Zhou, what you want to appraise Where is it, show me."

Without Zhou Ning moving, Da Zhao has already placed the notebook in front of Mr. Hu.

Mr. Hu didn't take out any reading glasses, and leaned closer to the screen to look at it. Da Zhao hurriedly asked:

"Mr. Hu, do you need to bring the original, or print a copy?"

Old Hu nodded.

"Give me a pair of gloves, and I'll just take a look at the original. After all, you have to observe the strength of the pen and whether it pauses. I know this thing is an important substance, and I promise it will not affect your evidence collection."

Zhou Ning waved his hand, Sun Gaotie hurried to get it, and took back two pieces of paper in a short time. Zhou Ning saw that Sister Cui was even more ruthless, and completely separated the paper with two electrostatic plastic films. You can see some light yellow and black paper on it. Fingerprint marks.

Mr. Hu was not unhappy, but excited on his face.

"Yes, your technology is quite powerful. It is very difficult to extract fingerprint information from paper, especially due to the age and improper storage. Most of the ones you find are black."

Xu Dayuan licked his lips, as if he was the one being praised.

"Hey, it's incomparable with the technology of the provincial government. We don't want to disturb you, Mr. Hu. Everyone here is evacuated. Da Zhao, Zhou Xiaozhou and Mr. Xia are with Mr. Hu. If there is something to do, we will wait outside. .”

Mr. Hu looked carefully and kept recording something in his notebook. Zhou Ning didn't understand and didn't dare to disturb him. Xia Momo went to Zhou Ning's side.

"Go get busy if you have something to do. I'll wait here. The comparison won't be quick. After all, the handwriting on these two pieces of paper basically has nothing to do with us from the perspective of ordinary people."

Before Zhou Ning could speak, Mr. Hu raised his head and smiled.

"You girl, who said it doesn't matter, in my opinion it matters a lot!"

(End of this chapter)