For the hairstyle of the police, it seems that the standard is the size, but in principle, there are not too many requirements for the hairstyle of the official police.

As long as it makes people look refreshed......

Of course, it is unlikely that a situation where bangs can cover your eyes is as handsome as East Asian country H is.

Undercover cops don't ask for that much.

But the police academy students are different, from the beginning of entering the police academy, the first thing to go through is the haircut level, and all police academy cadets must "shave their heads".

Of course, the bald head mentioned here usually refers to a very short board size.

This is similar to that of a soldier......

When soldiers march to war, especially in wartime, they usually have to shave their heads before they can go to the battlefield, and they can only be operated on if they are injured in the head during wartime.

Therefore, practitioners in high-ranking occupations usually have a rigid hairstyle, giving people a tough performance.

However, in recent years, due to the leading role of film and television stars, more and more young people have begun to choose to shave.

As the saying goes, if you are a handsome guy or not, you will know if you have a plank.

Hairstyles can cover up blemishes, but board sizes are more masculine.

He Junchao likes to have long hair because of his bad face shape, but it is difficult to get up in winter and his hairstyle is difficult to take care of.

Therefore, He Junchao often comes to work with a dull hair, and the head of the chicken nest is often the object of ridicule.

But the attendance is okay, and there is a police hat to cover the flaws.

But in recent years, many police officers have not liked to wear hats, mainly because they are troublesome.

But I have to say that the police hat is indeed the best choice to unify the spirit.

For example, Gu Chen and Lu Weiwei like to wear police hats to enforce the law, with the national emblem on their heads, representing Haoran righteousness.

"He Junchao. Officer Wang walked up to him, rubbed his right hand on his head and said, "After eating at noon, hurry up and get a haircut, you come to work all day long with dull hair, it really affects the overall appearance of the three groups." ”

"It's not that exaggerated, Lao Wang?" He Junchao grabbed his hair, and immediately the snowflakes fluttered, and dandruff flew in the air.

"Look at it!" Officer Wang picked up He Junchao like a little chicken, and then flew up a jio, kicked He Junchao aside, and said loudly: "You still don't have a haircut?"

Officer Wang looked around and said, "Listen to the three groups, I know that everyone is working hard these days, but a hairstyle like He Junchao makes people decadent." ”

"So today, after lunch, everyone's hair is long, and they are all shaved into a board, do you understand?"

"Got it. ”

"Another haircut? It's cold. ”

"Well, since the big guy is talking, let's go get a haircut. ”

Three groups of old and new comrades answered sparsely.

He Junchao, who returned to his seat, suddenly said, "I said Lao Wang, then there must be a standard, right?"

"Standard?" Officer Wang's gaze returned to Gu Chen's body, and then he pointed at Gu Chen and said, "Gu Chen is the standard, everyone is shaved like Gu Chen." ”

"Ah, isn't that a big loss?" He Junchao stopped doing it at that time, and said with some complaints: "Everyone knows that Gu Chen is handsome and can control all kinds of hairstyles, but people who look average have no way to live?

"Yes, let's just fix the edges, right?" another old comrade complained.

Officer Wang said angrily: "Let's unify it, don't discount it, and take care of Gu Chen's hairstyle in the future, I want to let Zhao Ju take a look and see the spirit of our three groups." ”

"Also, what's going on with those few who have made a fortune? Can you still gain weight in the third criminal investigation group? This shows that there is still not much work assigned to you, so hurry up and reduce it this month. ”

"Senior Brother Wang. A probationary police officer suddenly complained: "At this time, once people are under pressure, they will also be blessed, not because they don't have enough work." ”

"That's right, in our three groups, is there still a chance to be lazy? The probability is so slim that it can be ignored, right?"

"Hehe, it may also be that the dark dishes in the cafeteria are too delicious, and we are all fattened, I heard that Master Kong has recently researched a few new dark dishes, and it will be on the market at noon today, tsk, some can eat it." ”

"Okay, I got it. Officer Wang walked to the middle of the office, and then said: "I have a request today, a haircut, I will come to check it in the afternoon, if you see the edge is too long, I will borrow an electric pusher knife and help you with it personally, but don't complain about it at that time." ”

As soon as they heard Officer Wang's words, everyone suddenly didn't dare to slack off.

If you want to let Lao Wang get a haircut, it is better to go to the temple and become a monk.

......

......

At noon, the canteen of the Seremban branch.

The dark cuisine studied by Master Kong may have failed, and many people complained bitterly after eating the dishes.

I feel that everyone has been fooled, and there is a kind of guinea pig role that plays the role of Master Kong studying the dishes.

Chef Kong often researches some special dark dishes, and if he tastes them well, he will immediately push them to the canteen.

From the various expressions in the process of tasting, you can judge whether you need to continue to launch or stop there.

Therefore, whenever there is a new dish, Master Kong will sit in the corner of the canteen and quietly observe the every move of the "guinea pigs" in the canteen.

Gu Chen, Lu Weiwei, Yuan Shasha and Officer Wang, the four of them took a long time to sort out the materials, so they were the last to get off work and the latest to arrive at the cafeteria.

Seeing everyone's depressed expressions in the cafeteria, Lu Weiwei, who was a human being, immediately understood in seconds, and hurriedly reminded everyone: "It seems that Master Kong's 10th attempt at a new product has failed again, everyone remember not to fight those strange-looking meals." ”

"Lao Kang is really, we are not guinea pigs. Officer Wang shook his head and picked up the stacked plates.

Last time, because I was curious, I made a dark dish from Master Kong's latest production, but Officer Wang was tired and collapsed in the toilet all afternoon, and the whole person was about to collapse.

So since then, Officer Wang has also begun to become shrewd, and every time he gets Master Kong to innovate again, he will deliberately take everyone in the three groups to work overtime to consume the time in line.

In this way, the guinea pigs go forward and follow, and they have to watch the wind and steer the rudder.

After finishing the meal, the four of them found a spare place and sat casually.

At this time, Nie Xiaoyu didn't know when, he suddenly appeared behind Gu Chen, and gently patted Gu Chen's shoulder with his right hand: "Brother Gu Chen." ”

"Xiaoyu?" Gu Chen turned his head to look at her and smiled: "I haven't seen you for a long time, you've been busy with your homework recently, right?"

"Pretty much, but I've been writing one lately. Nie Xiaoyu said, then walked to Gu Chen's side, squeezed Officer Wang away with his buttocks, and then sat down next to Gu Chen.

"Writing?Is it so powerful Xiaoyu?" Yuan Shasha was also surprised, feeling that Nie Xiaoyu was a little interesting.

Nie Xiaoyu laughed dryly, and quickly waved his hand to be modest: "It's okay, there are a few of them in our class, but they are all sweet pet essays, I don't want to write this type." ”

"Then what do you want to write?" asked Lu Weiwei.

"I wanted to write a book set in the late 19th century, and then something that happened in that era. ”

"Yo?" Before Nie Xiaoyu could finish speaking, Officer Wang directly interrupted: "Okay, Xiaoyu, are you going to write a historical essay?"

"It doesn't matter if history is not history, I just want to write some stories based on that era, because when I was a child, I heard some stories from my grandfather's generation, and I felt that there were a lot of interesting stories. ”

"So I like to tidy up, write a short story, and participate in the website's recent essay contest. Nie Xiaoyu said.

"Yes. Gu Chen put down his chopsticks and was the first to agree: "It's a good thing to participate in the essay competition, I support Xiaoyu." ”

"Then I'll support you too. ”

"Me too. ”

Lu Weiwei and Yuan Shasha also hurriedly said.

For a while, everyone gave a thumbs up, feeling that Nie Xiaoyu was a little powerful.

Only Officer Wang nodded reluctantly.

How hard is it to write?

Officer Wang once started writing in high school, but he pounced on 10 books in a row, and finally became so angry that Officer Wang stopped writing.

So listening to Nie Xiaoyu's idea of writing a book, Officer Wang was supportive, but in fact, his psychology was still sour.

"Light rain. Officer Wang turned his head to look at her and asked, "Is that realism in your story so old?"

"Definitely. Nie Xiaoyu suddenly turned his body and said seriously: "I just want to write a realistic work about that era, the content in it is mainly about a very powerful detective, the story of the major forces." ”

"But what forensic techniques were available in the late 19th century? I don't know too well, so I've been trying to find information about the history of forensics. ”

"In the end, however, nothing was found, and the books I could find about forensics and crime were only around the thirties of the 20th century. ”

"Earlier...... Then you can't find it anymore. Speaking of this, Nie Xiaoyu looked up at Officer Wang and explained, "Officer Wang, do you usually read a lot?"

"It's okay. Officer Wang immediately put down his chopsticks and said lightly: "Let's not talk about astronomy and geography, but at least the basic knowledge is still understood." ”

"Do you know what forensic tools might have been available in the late 19th century?" can you tell me about it?" asked Nie Xiaoyu with a wink.

"This ......" Officer Wang was stunned for a moment.

Originally, he said it casually in front of Nie Xiaoyu, but he didn't expect Nie Xiaoyu's question to be a bit cross-era, and it was particularly serious.

What a distant time in the 19th century, Officer Wang was momentarily dumbfounded.

Is it serious to co-author you Nie Xiaoyu wrote?

"You don't know?" Nie Xiaoyu asked first, and then immediately waved his hand and said, "Yes, in fact, I didn't plan to ask you." ”

"Hehe, light rain. Officer Wang smiled, and the whole person was embarrassed, so he quickly explained: "The time you said is too far away, how can anyone know this kind of knowledge, maybe there is, but there are very few things that can be remembered, and our Furong Branch does not have it at all." ”

"Really?" Nie Xiaoyu didn't believe it, turned around and asked Gu Chen again: "Brother Gu Chen, what do you say?"

Gu Chen glanced at Officer Wang, and said with a slightly calm expression: "Xiaoyu, the reason why it is difficult for you to find forensic forensic tools before the 20th century is also for sure, because it was still very rare at that time, because forensic forensic forensics is a modern science. ”

"So?" Nie Xiaoyu nodded frequently, and then said: "I'll just say, I can't find so much information, but if I use modern forensic forensics to write about that era, will there be a contradiction? Or is it rigorous?"

"Not really. Gu Chen shook his head, then slowly put down his chopsticks and explained seriously: "But there are a few exceptions. ”

"Huh?" Nie Xiaoyu was puzzled, looked at Gu Chen blankly, and then quickly took out his small notebook, opened it and asked Gu Chen, "What do you mean?"

"Right...... That's right. Yuan Shasha was also stunned for a moment, and hurriedly asked Gu Chen: "Senior Brother Gu, in this era, it seems that it is quite difficult to distinguish forensic identification techniques, right?

"Yes, too. Gu Chen paused, and began to use his specialization-level memory to try to recall the materials he had read before.

In his mind, all kinds of lightning struck in various brain cells, instantly allowing Gu Chen to remember what he had done before.

Gu Chen's eyes widened and he said, "You can try to write something about toxicology." ”

"Poison ...... Nie Xiaoyu was stunned, quickly recorded it in the transcript, and continued to ask Gu Chen: "Brother Gu Chen, is this something from that era?

"Write about arsenic because arsenic is a common poison that has been used for centuries. Gu Chen said.

Nie Xiaoyu continued to bury his head in the record, and then asked, "Which arsenic?"

"Left stone right Shen. ”

"Uh-huh, got it. Nie Xiaoyu recorded it completely.

At this moment, Lu Weiwei, who was sitting opposite Gu Chen, was a little puzzled: "Is this 'arsenic' so important?"

"Yes, why haven't I heard of it?" Officer Wang thought that he was not a good student, but he didn't understand any of what Gu Chen said.

It is equivalent to being on the same level as Nie Xiaoyu.

Gu Chen smiled, and said seriously: "'Arsenic' is very representative in this period, but for most of its evil history, it has never been able to confirm that it is the culprit of suspicious murders......"

Speaking of this, many of the police officers who were eating around began to face Gu Chen, and some even came to Gu Chen's side with their rice bowls.

Soon, a small circle formed around Gu Chen, and everyone wanted to listen to a book, firmly surrounding Gu Chen in the middle.

In 1775, the Swedish chemist Carl Schiller proved that arsenic could be converted into arsenite acid with chlorine water. Gu Chen directly took Nie Xiaoyu's small book, wrote the Chinese and symbols of this element on it, and continued:

"If you then add zinc and heat this acidic mixture, hydrogen arsenide gas is released. ”

"When this gas comes into contact with a cryogenic container, arsenic condenses on its surface. ”

So, in 1821, when Severas used this technique to detect arsenic in the stomach and urine of poisoned people, the field of forensic toxicology was born. ”

"Wow!" there was an exclamation at the scene, and many people suddenly realized.

Lu Weiwei was also surprised, and said with some admiration: "It turns out that this is the birth of the field of forensic toxicology, I heard some of it in the police academy before, but now I have forgotten it, I didn't expect Senior Brother Gu to remember it?"

"It's okay. Gu Chen smiled faintly, and then said, "But it's a pity, since then, this field has progressed quite slowly. ”

Everyone seemed to understand and nodded to each other.

"Mark, Twain, do you know?" asked Gu Chen casually.

Nie Xiaoyu immediately raised his hand and said, "I know, a famous writer." ”

"Yes. Gu Chen nodded and continued: "Mark Twain knew the power of fingerprint recognition, and in his two books, Life on the Mississippi River, and The Tragedy of Fool Wilson, he put this technology to use. ”

In the former, he used a thumb fingerprint to make the murderer visible, and in the latter, he used a fingerprint during the trial. ”

"Oh my God, I just like to intersperse this kind of content with this. Nie Xiaoyu was suddenly overjoyed, and quickly grabbed Gu Chen's arm and shook it: "Then Brother Gu Chen, who first invented fingerprints to solve the case?"

"This ......" Gu Chen hesitated for a moment, and then said lightly: "Actually, what is interesting is that the plots of Mark Twain predate the publication of Sir Francis Galton's fingerprint research. ”

"Isn't it interesting that the latter, Sir Galton, was knighted for 'discovering' the value of fingerprints?"

"Oh my God!" Officer Wang was also surprised, so he hurriedly asked Gu Chen: "Gu Chen, in this way, the writer Mark Twain was the first to use fingerprints in the case, and what Sir Francis Galton was knighted only because he discovered the value of fingerprints?

"yes, it's incredible, right?"

"Then Mark Twain is going to cry and faint in the toilet. ”

"Haha, this is the two people who planted trees in the past. ”

Many onlookers, old and new, could not help but feel sorry for Mark Twain.

Gu Chen smiled: "Although the writer Mark Twain wrote the relevant fingerprint solving case earlier than Sir Francis Galton, he did not value the fingerprint case. ”

Later, Sir Francis Galton was different, and he further promoted the fingerprint case, which led to the future fingerprint inference. ”

"So in any case, the contribution of the two to the fingerprint solving of the case should not be underestimated, but the latter is representative, but it is really systematic, waiting to mention another person, that is, the Argentine city of La Plata, police officer Juan Busettic. ”

"Ugh!"

Everyone was stunned, because what Gu Chen said, everyone was not very clear.

Usually, I only know that fingerprints play a very important role in the handling of cases, but no one pays attention to how they came back then.

For example, before the invention of the stethoscope, everyone didn't know that in fact, when doctors auscultated female patients, they all touched each other's chests to feel the heartbeat.

At that time, as soon as the stethoscope came out, many doctors were eager to kill the inventor of the stethoscope, of course, there are not many people who can know about this situation now, just one reason.

......