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

Xie Xuan stared at her intently, and after looking at her for a while, said: "Luyang County cannot be chaotic."

"Why doesn't Luyang County..." In the middle of speaking, Chen Chaoyan suddenly stopped.

According to the equivalent exchange rate, the sheriff is equivalent to the governor of a province.Serving in the military in front of the county guard is equivalent to being the secretary of the governor.Sicang's joining the army is equivalent to being the director of the bureau in charge of education and medicine.The Judicial Cangjun is equivalent to the chief of the court and the police station.The two military history and Wu Zuo, although there is no imperial establishment in this era, they are also at the staff level according to the locality.

A case that involves all the big shots in a county cannot be acted rashly.

But...Chen Chaoyan looked at Xie Xuan unwillingly, and insisted: "Luyang County cannot be chaotic, but the murderer cannot be let go either!"

"It's just that you can't act rashly. It's not that you want to let the murderer go." Xie Xuan said lightly, but the power contained in his words was like a volcanic eruption. All the guards of the mansion have to explain their whereabouts last night, or else it will be fine."

Chen Chaoyan nodded, "You can have this."

Xie Xuan chuckled twice, and after asking Chonglou to tell Feng Shoudao about his whereabouts, he turned to look at her.

Chen Chaoyan pretended not to see it, and continued to study the fingerprints on the loan with his head down.

After studying it several times, she proposed to go to Zhou's house to scan the fingerprints at the scene of the crime.

Of course Xie Xuan agreed to her without hesitation.

Night has come.

Xie Xuan didn't make any more publicity, but simply took Chen Chaoyan to Zhou's house.

Mrs. Zhou was having dinner with her two children, when she heard the news from the maidservant that Chen Chaoyan had come again, she immediately dropped the bowl and chopsticks and rushed out, "Miss Chen is here at this time, is..."

Chen Chaoyan avoided her expectant eyes and said, "I'll come back and see if I can find any clues."

Mrs. Zhou asked unwillingly: "Miss Chen hasn't autopsied yet, has she?"

Although it was cruel, Chen Chaoyan still said cruelly, "I'm sorry."

Mrs. Zhou's body softened, and she fell into the arms of the mother-in-law.Tears rolled down like broken beads.

Chen Chaoyan wanted to comfort her, but she didn't know how to speak when the words came to her lips.

"My husband-in-law has never borrowed money from the cabinet shop, and he will never commit suicide!" Mrs. Zhou closed her eyes and said with grief, "Miss Chen, let's go, I won't be with you anymore."

After Chen Chaoyan nodded apologetically at her, she motioned for Yuejian to push her away.

There are several yamen servants guarding the study room, but Wang Da is not there.What Chen Chaoyan wanted was to guard the study. As for who would guard it, she didn't care, so she didn't ask much.When several yamen servants bowed to Xie Xuan in trepidation, Chen Chaoyan, who was stimulated by Madam Zhou's grief, passed them directly and entered the study room first.

After habitually scanning her surroundings, and confirming that she was still the same as when she came in the morning, Chen Chaoyan asked Yuejian to push her to the lacquered wood coffee table.

The lacquered wood tea table and desk are all made of red lacquer.

Chen Chaoyan observed carefully for a while, and took a few breaths at the place where fingerprints might be left. After failing to see the fingerprints, she dipped the pen into the pot ash in the same way as scanning the fingerprints on the loan deed, and gently shaking onto the coffee table.

The coffee table is big, but the pen is too small.

After shaking for a while, I only finished shaking a corner.

I have to shake it all out, and then brush it out. I don’t know when it will be. There is a bigger desk waiting behind.Chen Chaoyan looked up at the bookshelf not far away, and called to Yue Jian, "Bring me that feather duster."

Of course Chen Chaoyan knew that a soft brush should be used to brush fingerprints so as not to damage them.But she is an amateur in fingerprinting, so she doesn't care about those details.

Dip the pot ashes with a feather duster, and shake it on the coffee table a few times. After it is completely covered with a thin layer of pot ashes, she presses the direction from left to right, lightly, little by little. Clean up.

The whole process took half a cup of tea.

But the result was... nothing.

Unwilling to give up, Chen Chaoyan used flour and pressed powder to sweep again, but there was still nothing.

The same is true for books.

Chen Chaoyan frowned and looked at the feather duster, pot ashes, flour and pressed powder, carefully considering the possibility of doing it again with a brush.

Next to her, Xie Xuan glanced at her to make sure she wasn't discouraged, then looked at the book case and asked, "Is there no fingerprints, or can't they be scanned?"

"It can't be swept out." Chen Chaoyan said.

"Why can't it be swept out?" Xie Xuan looked back at her.

Because the method is wrong.

Fingerprints left at crime scenes are generally divided into obvious lines, forming lines and latent lines.For obvious lines, it can be observed only with eyes, breath, magnifying glass or ultraviolet light.For forming lines and latent lines, physical or chemical methods are needed to observe and extract them.

The physical method is very simple, that is, the powder method she used to swipe her fingerprints.

For the chemical method, iodine smoke, Ninghai Delin, silver nitrate or fluorescent reagents are used.

There is nothing she can do about the chemical method.

But the laws of physics...

Chen Chaoyan raised the feather duster, touched some pot ashes, flour, and powdered cake with his chin, and said, "Probably the feather duster is not soft enough and these powders are not good at absorbing."

Without waiting for him to ask, she continued: "Powders for brushing fingerprints generally use copper powder, iron powder, and magnetic powder. For brushes, softer hairs such as stork, goose, and squirrel hair should be used."

Yue Jian looked at the feather duster, then at the pot ashes, flour and powder cake, and finally at her, "Then what should we do now?"

Chen Chaoyan said: "Go back."

Yue Jian looked at Xie Xuan.

Xie Xuan raised his eyebrows, "It's time for dinner."

When he got out of Qiwan Lane and got into the carriage to go to the Sheriff's Mansion, Wang Da hurried to Zhou's house after receiving the news.

Several yamen servants kept guarding outside the door, not knowing what Chen Chaoyan was doing in the study.Wang Da couldn't get the news he wanted from them. When he entered the study, he saw all kinds of powder scattered under the coffee table and desk. After his heart sank, he quickly found Mrs. Zhou and asked threateningly: "Chen?" What the girl is doing at Zhou's house is related to the detection of Zhou Zhongcai's case, I hope Madam can tell the truth!"

Mrs. Zhou, who had finally dried up her tears, couldn't help but wet her eyes again when she heard this.After wiping away her tears with a handkerchief and comforting her overwhelmed parents in a low voice, she resisted the bitterness and repeated to him what Chen Chaoyan said after she came.

After Wang Da heard it, his heart became more and more heavy, but he continued to ask without revealing anything: "Miss Chen didn't say what clue she came here for?"

Mrs. Zhou shook her head: "Ms. Chen just said to come over to see if she could find some more clues. The concubine didn't follow. What clues she was looking for and what clues she found, I don't know."

Wang Da couldn't help scolding an idiot, and Mrs. Zhou fell back into the chair in fright, and also made Mrs. Zhou's parents tremble.Mrs. Zhou's younger brother wanted to stand up and protect them, but they secretly pulled him back.

Wang Da, who had a panoramic view of everything, quickly restrained his anger, and bowed his hands to apologize: "The king of Jin came to Luyang County to have fun, and no one can predict when he will leave. Although Miss Chen is good at solving crimes, she is the son of the king of Jin." People. When King Jin leaves, she will definitely leave with her. Once she leaves, whether the case can be solved or not is unpredictable. I was too anxious, and my words were offensive. I hope my wife can forgive me. "

Mrs. Zhou was shocked by the news that Chen Chaoyan would follow Xie Xuan to leave at any time, and forgot to continue crying for a moment.After Wang Da apologized again, she came to her senses and said in a panic, "I don't know that Miss Chen will leave at any time."

"I just got this news." Seeing that he was holding her steady, Wang Da asked immediately, "Madam has always said that Zhou Zhongcai was murdered. So I can't go on anymore, Madam please remember that when Ms. Chen comes to Zhou's house in the future, no matter what she does, Madam will follow her closely and keep her words and deeds firmly in mind, in case of emergencies."

Mrs. Zhou responded quickly.

"Then don't disturb Madam's rest." Wang Da bowed his hand again, turned and left.

When he reached the door, he stopped again, turned around, and instructed carefully: "In order to avoid Miss Chen's misunderstanding, please keep what I say, Madam, and don't spread it outside."

As he spoke, he deliberately glanced at her parents and younger brother.

Mrs. Zhou obeyed his words, and after taking a look at her parents and younger brother, she agreed: "But please rest assured, my lord, I will keep my mouth shut."

"Then there will be Mrs. Lao." After Wang Dawei nodded, he returned to the study room again.After pondering over the scattered pot ashes, flour and powder ash for a moment, he left Zhou's house and rushed to the sheriff's mansion.