Zhou Ning's words quieted everyone down, and Da Zhao thought about it and nodded.

"What Zhou Xiaozhou said makes sense, generally robbers or kidnaps, the valuable things on the hostages will definitely be scavenged, after all, they are to rob money, but this person can give up such a valuable gold lock, this determination is not ordinary."

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

"2000 2.3 kidnapping eucalyptus and 2004 4.14 kidnapping eucalyptus, the letters sent by the kidnappers I hope to send them for analysis to see if they can find fingerprints or residues, the kind of extraction method that Sister Cui used last time, can also be collected on paper, and we now have to dig up all the points that can be viewed.

In addition, 4.14 Who are the people who received the alarm? Which brigade went to the people? Who has access to the exhibits? We won't be involved in any of this, and I'm going to know now if there are any similarities in the letter notes of these two eucalyptus, and if we can find a handwriting expert to analyze it? ”

Xu Dayuan frowned, looked at Zhou Ning and nodded.

"You can find the expert yourself, it's really not okay to ask the Sun Bureau, find the expert he compared last time, as for the investigation of Chen Gang, Zhu Yantao, Zhu Guotai, Fang Yue's social relations, and the investigation of the 4.14 police involved in the eucalyptus, I will operate it here.

I want to get your criminal image portrayal as soon as possible, no matter what you think of in terms of murder weapons and behavioral habits, just tell me directly, you don't have to verify whether the direction is wrong, let's actually investigate to verify everything.

Zhu Yantao went there Liu Yufei and Da Zhao to take a trip, one was to find the letter, and the other was better to take him on a trip. ”

Zhou Ning didn't refuse, in fact, he didn't want to alarm Zhu Yantao, after all, the old man has been immersed in the grief of losing his child for so many years, and now he has no eyebrows, too much disturbance will make him emotionally ups and downs, but if you want to investigate carefully, you must have that letter.

With a sigh, Zhou Ning nodded towards Da Zhao.

"You go, fat man, you are familiar with it."

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

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

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

"Let's go, go to the front building and I'll change into civilian clothes, do you drive or do I drive?"

Da Zhao smiled.

"How can you be tired, of course I'll 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.

"What's this kid singing?"

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

"Zhu Yantao left Qindao because he didn't want to be disturbed, he wore a police uniform and drove a police car over, and the people around him must have a lot of discussions, so as not to let some people find out, now we can only wait, wait for Da Zhao to get the letter back, and then compare the handwriting."

Liu Yongxin poked Zhou Ning.

"Don't waste it, call the Sun Bureau, ask the handwriting expert if he is free, and take it directly, so that both sides will not delay."

Zhou Ning shook his head and dialed Xia Momo's phone.

"Mr. Xia, are you at the piano university? Last time I heard you say, I know a handwriting expert who doesn't know if it's from Qindao or the provincial capital? ”

"Can't you just be polite?"

Zhou Ning was stunned for a moment, and felt that he was a little unkind when he thought about it.

"I'm sorry, I was in a hurry and didn't pay attention to the tone."

"Forget it, if you're polite, it's definitely an unfamiliar person, the expert I'm talking about is a friend of my father, who originally worked in the forensic center in the provincial capital, and returned to Qindao after retirement, if you have anything that needs to be identified, I can ask him if he has time."

Hearing that it was Xia's father's friend, Zhou Ning paused slightly, after all, his previous suspicion of Xia's father made Zhou Ning still apologize.

"I'm a little embarrassed, but please help me contact it, Da Zhao, they went to get the comparison object, even if they get it back, it will be night, why don't you make an appointment with an expert to come over tomorrow morning to analyze it?"

"Got it, I'll call you."

......

June 26, 2012

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

"Zhou Xiaozhou, you are here, there is good news."

Zhou Ning looked puzzled, they took Zhu Yantao back last night, Da Zhao went to settle the fat man to rest, and didn't talk about anything that night, at this time, there was good news, could it be that there was something found on the threat letter and note?

"What did Sister Cui find?"

Da Zhao rubbed his nose and handed over a report with a grin.

"Okay, I won't play dumb riddles with you, guess and guess, it's always me who gets hurt, Sister Cui is too good, he extracted a lot of fingerprints on the paper, after fumigation, although the materials on the two pieces of paper are different, but a special problem was found.

It is on the two pieces of paper, there are several special traces, the paper is a little wrinkled, the traces are similar to fingerprints, but the fingerprint residue is not clear, the eldest sister said that this is the finger wet state left traces, she tested the part, found sodium chloride and potassium, magnesium, calcium, lactic acid, urea nitrogen, etc. ”

Zhou Ning hurriedly took the report, read it carefully, and looked at the photo of another threatening letter, and at a slight pouring angle, he could indeed see that there were several traces of curls and folds on 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 unsure."

Zhou Ning stared at the report, as well as these photos, and after thinking for a long time, Liu Yufei was already anxiously coming over.

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

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

"Don't disturb him, let Zhu Yantao go upstairs to the conference room in a while, and we'll go there to talk."

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

"One of these two eucalyptus occurred in Qidong, and the other was in Qindao, there is no overlap in the personnel of the office, and one is on the 29th of the lunar month, and the other is on April 14th, which is not a very hot season, but the fingerprints soaked in sweat left on it are consistent."

Liu Yongxin also came interested and took a look at the two photos.

"You mean, the murderer is the only one who can touch two pieces of paper at the same time, and this person is always sweating profusely at any time, right, maybe only the hands will keep sweating, more than the normal amount of ordinary people, that is not hyperhidrosis?"

Zhou Ning nodded.

"If it is not secondary hyperhidrosis caused by a special disease, then the general patient will improve the situation of hyperhidrosis 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 make it clear, this murderer is sick? Or does Zhou Xiaozhou have the result of a criminal image portrayal? ”

】

Zhou Ning smiled, Xu Dayuan was always anxious.

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

Xu Dayuan nodded, and he understood when Zhou Ning said this.

"Then wait a minute, but it's a major breakthrough to find the same trace of this kind of sweat on two pieces of paper, but haven't you searched the fingerprint library for fingerprints?"

Da Zhao shook his head.

"The fingerprints extracted are all mutilated, and this can be compared and screened, but it is not possible to search for this alone."

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

"Teacher Xia, you're here, hurry in, come in!"

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

"Hu Lao, please, this is the Xu Bureau of the Qindao Municipal Bureau, this is the forensic doctor Liu of our laboratory, and this is the director of the second forensic office of the technical department, Zhou Ningzhou, who asked me to invite you over."

As she entered the door, Xia Momo introduced the old man, and of course introduced to everyone, this old man Hu's absolute technical school is doing this handwriting appraisal in the judicial appraisal 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 tactful enough to speak, so he pushed the person in front of Hu Lao with Da Zhao's collar.

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

"Hello Hu, would you like to take a break, or find you a quieter place? I'm really embarrassed to ask you to give an appraisal. ”

Da Zhao smiled awkwardly, amused Hu Lao, and patted Da Zhao's round belly.

"This fat boy can speak, I'm not so hypocritical, and I'm idle, I can do an appraisal, and I feel that I haven't become a waste waiting to die, so I'm very happy, Xiao Zhou, where is the thing you want to identify, show me."

Without Zhou Ning moving, Da Zhao had already put the notebook in front of Hu Lao.

Hu Lao didn't take out any reading glasses, he approached the screen and looked at it, and Da Zhao hurriedly asked:

"Hu Laoyong, do you need to bring the original, or print a photocopy?"

Hu Lao nodded.

"Give me a pair of gloves, I'll just look at the original, after all, you have to observe the strength of the pen, and whether there is a pause, I know that this thing is an important substance, and I guarantee that it will not affect your evidence."

Zhou Ning waved his hand, Sun Gaotie hurriedly went to get it, and after a while, he brought back two pieces of paper, Zhou Ning saw that Sister Cui was even more ruthless, and completely isolated the paper with two electrostatic plastic films, and some yellow and black fingerprint traces could be seen on it.

Hu Lao was not unhappy, but his face was excited.

"Yes, your technology is quite powerful, it is very difficult to extract fingerprint information on paper, especially under the influence of many years and improper storage, most of the things found are black."

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

"Hehe, there is no comparison with the technology of the provincial department, so why Hu Lao, we won't bother you, everyone here has withdrawn, Da Zhao and Zhou Xiaozhou and Teacher Xia are accompanying Hu Lao, if there is something to shout, we will wait outside."

Hu Lao looked at it carefully, constantly recording something in his notebook, Zhou Ning couldn't understand it and didn't dare to disturb, Xia Momo came to Zhou Ning's side.

"If you have something to do, you can get busy, I'll wait here, the comparison won't be fast, after all, the handwriting on these two pieces of paper, from the perspective of us ordinary people, basically has nothing to do with each other."

Without waiting for Zhou Ning to speak, Hu Lao raised his head and smiled.

"You girl, who said it doesn't matter, in my opinion, it has a lot to do with it!"