At the beginning, the first round of evidence collection was completed by Tang Yunzhen, and later Yang Qi came to see it again, the conclusions of the two people were the same, and Zhao Tianhu had already admitted the burglary, and there was basically no omission of physical evidence outside the bedroom, which Zhou Yanfei was relieved of, so she didn't look at the living room and other places at all, and went directly to the bedroom of Zhang Meina's corpse.

Cleaning up how much property has been stolen can be handled by a probationary police officer like Cheng Fengqian, and there is no need for her, the deputy director of the Criminal Science and Technology Office, to come to such a trip in person.

Zhou Yanfei's goal is to solve the mystery of the perfect secret room.

Zhou Yanfei stood at the door of the bedroom, staring at the footprints on the ground, and in less than half a minute, he had already reported the height, weight, and age of the courier who had reported the case before and Mr. Wang next door, and also knew that the courier had mild O-shaped legs, and Mr. Wang had arthritis, and the left side was more serious than the right one.

Although these conclusions can be estimated after entering the relevant data of footprints on the computer, Zhou Yanfei can say it just by looking at his eyes and mental arithmetic, which still opens Cheng Feng's eyes.

"Good...... It's amazing!" Cheng Fengqian looked at Zhou Yanfei's handsome, beautiful, serious and professional posture, and took out a small notebook a little excitedly and began to prepare to make records. "Team Tang, does Sister Feifei have to have a trace inspection class with us every week?"

"Yes, but it's not just for us, she has to teach every department of the entire Southern District Bureau, so it's about two or three months before it's our team's turn. Tang Yunzhen leaned against the door of the bedroom, looking at Zhou Yanfei in the room, and the corners of his mouth unconsciously brought a light smile. "Ah Feng, when you are in class, remember to grab the front position early, and bring a good camera to take a picture, colleagues in the bureau who don't have time to listen to the class rush to ask for it, before there were colleagues in the North District who wanted to buy it at five times the price, but our director said that when it comes to some real cases in the South District, the information must not be passed on, otherwise you can make a fortune just by selling this courseware." ”

Although Zhou Yanfei was wandering around the bedroom, his ears were listening to the movement at the door. "Ah Feng, although I can shoot beautifully, you still remember to bring a camera with better colors. ”

"Definitely!" Cheng Fengqian's face was full of admiration. "Sister Feifei is not the 'first person in Xingang trace inspection', and there are many fans in other sub-bureaus. ”

"Don't say it, although it is because there has always been a shortage of people in trace inspection, and the total number of people is pitiful, but this 'first person in Xingang trace inspection', I really convince her. Although Tang Yunzhen was talking to Cheng Fengqian, his eyes were always on Zhou Yanfei. "A few years ago, the Criminal Science and Technology Office became independent, at the same level as our Criminal Investigation Detachment, with the same title, salary, and benefits, but it was really hard for them to do trace examinations...... Because of the need for more professionalism, in addition to practical experience, they also have to constantly learn new theories and techniques, many people can't bear the hard work when they first enter, and it doesn't take long to apply for transfer to other departments. If it goes on like this, the technical room will always be short of people, coming and going, just your sister Feifei has survived from a newcomer to a senior, and has become the first person, they Director Wu is called a person who hurts her, what new equipment she wants, Director Wu has to buy it for her out of his own pocket! She has become the treasure of our sub-bureau, where the director goes to praise her, her glorious deeds are all over the Xingang City Public Procuratorate and Law, and it is not uncommon for the North District Bureau to have a few fans of her, I heard that there is almost her support club. ”

"Oh, how can you have the support of the Tang team to be powerful, it's been a few anniversaries. When Zhou Yanfei was working, he also had to tease Tang Yunzhen a few words. "Ah Feng, what about his exaggerated virtue, just listen to it, don't learn it...... I'm not so godly, just because we're not separated by a line or half a line, you look at what I do seems to be very profound, but in fact, in our technical room, Yang Qi and a few of them can also do this, there is nothing special to praise, it is nothing more than more practice. But you don't have to be in a hurry to practice this, you are a criminal policeman, or not the same as us, we are facing death evidence, you are facing a big living person, dealing with people, you are more flexible, according to the different personalities of the suspects or witnesses encountered, adjust the way of questioning or ...... Trick me occasionally, in this regard, I am really not as shrewd as your Tang team, when will you practice to the level of a person like him, it will be about the same. ”

"Why do we seem to be complimenting each other in business?" Tang Yunzhen smiled slyly at Zhou Yanfei, and then raised his hand and patted Cheng Fengqian's shoulder. "Don't worry, learn slowly, learn from me and your brother, or learn from your sister Feifei, anyway, in the end, different paths will end up the same. ”

Zhou Yanfei didn't talk to them much and continued to wander.

There has been no trace of anyone other than Zhang Meina in the bedroom, and if she committed suicide, then there must be a place to fix the murder weapon.

Zhou Yanfei and Zhang Meina are similar in height and size, she walked around the bedroom several times, estimated the approximate location, and commanded Tang Yunzhen to work.

Cheng Fengqian originally wanted to help, but Zhou Yanfei suddenly yawned and said sleepy, asking him to buy a cup of coffee and come back.

As soon as Cheng Feng left, Zhou Yanfei didn't even bother to stand, moved a chair from the living room and tilted it outside the bedroom door to watch Tang Yunzhen busy alone.

Tang Yunzhen climbed up and down like a voice-activated robot, following her command. "I kind of understand, you are giving Ah Feng your idle position, so you will leave me alone for trouble. ”

"yes, who told you to come along? Zhou Yanfei glanced at Tang Yunzhen with disgust and pointed at it casually. "Above, a little further up, the blood could have spurted to that height. ”

"Good intentions are not rewarded. Tang Yunzhen complained on the one hand, but on the other hand, he was still doing what Zhou Yanfei said. "I didn't think that Ah Feng didn't have much experience in the scene, so I came to help you. ”

"He has no experience, I have it, since I am not at ease with you, I insist on coming to help us, then you can work!" Zhou Yanfei was still nestled in the chair, and after seeing that it was almost over, he got up and walked in slowly. "Go, close the curtains over there. ”

"Sister Feifei, your coffee. Cheng Fengqian just came back, and after handing the coffee to Zhou Yanfei, he handed a tissue to Tang Yunzhen. "The Tang team is sweating profusely. ”

"Thank you. Tang Yunzhen wiped his sweat while leaning into Cheng Fengqian's ear and whispered. "She just relied on me as a charter wife, bullying me all day long, you see that she is so beautiful, but her heart is inversely proportional, isn't it particularly scary?"

"Say bad things about me, I hear you. Zhou Yanfei was originally a little unstable in holding the coffee in one hand because he was squatting on the ground and tossing the utensils in the suitcase, but when he heard Tang Yunzhen's complaint, he made a gesture to splash him. "Don't look at who I'm responsible for the case before I came out in the middle of the night?

"Okay, okay, you've worked hard, I'll buy it for you when the mall opens at dawn. After Tang Yunzhen wiped his sweat, he went to close all the curtains in the bedroom.

Cheng Fengqian only understood when he saw this, and asked suspiciously. "Why do you have to do a new blood trace test? Or do it all over the room? ”

"You'll find out soon. Zhou Yanfei smiled, put on filter glasses, and handed Cheng Fengqian a pair.

Tang Yunzhen stretched out his hand to her, but she didn't give it, turned her head arrogantly, and asked him to take it himself.

Tang Yunzhen was helpless, and after putting on his glasses, he closed the bedroom door.

A secret room, recreated.

Although the scene has long been collected and simply cleaned up, the permeability of the blood stains is very long, and the actual preservation period is longer than what the eye sees.

After spraying the professional potion, the light was isolated, and then the special effect light in the box was turned on, and the three of them stood in the center of the bedroom and carefully observed the surroundings.

"Cabinet!" Cheng Fengqian pointed to the bookcase that slowly showed traces of blood. "The last time we came, there was no blood. ”

Zhou Yanfei raised his camera and took a picture. "Do you think this bloodless area looks like the hilt of that dagger?"

"Like. As soon as Tang Yunzhen nodded, the back of his head was slapped hard by Zhou Yanfei, and he was so cold that his head that was already close almost hit the cabinet in front of him. "Honey, you murdered your husband!"

"Any more nonsense will really kill you. Zhou Yanfei was about to hit again, but Tang Yunzhen jumped back first, and she was even more angry when she didn't hit anyone. "Look at what you did in the first round of evidence collection, you didn't find such obvious traces? Yang Qi too, wait for me to go back and clean him up!"

"You have a specialization in the art industry, you said that physical evidence is your home show, of course I am not as good as you. At first, who thought that she might have committed suicide, there were obvious blood stains on the ground, which should have attracted people's attention, where did I think that the bookcase with no blood was the accomplice?" Tang Yunzhen took off his glasses and looked at the bookcase again, even the inner seam was clean, and there was no blood at all. "How did she manage to wipe the bookcase so clean when she was seriously injured?"

"There should still be something that can temporarily block the blood from soaking into the bookcase. Zhou Yanfei walked to the window and opened the curtains, looked out the window, and thought for a moment. "It should be lightweight, and fold easily to reduce the volume, so she can just throw it out the window while she's still conscious. ”

"Sister Feifei said that it is very similar to paper, and then throw it out in a ball, such a tall building and wind, and the paper ball will soon not know where to fly. Cheng Feng pinched his chin and thought seriously. "But if it's paper, the blood will still soak through to the bookcase, and with the naked eye, it won't be so clean. ”

"yes, it won't be that clean. Zhou Yanfei suddenly had a flash of inspiration. "Is there an oven in the kitchen?"

"Yes. Cheng Fengqian nodded, and then suddenly understood. "Tin foil?"

"This kid is very smart!" Zhou Yanfei gave Cheng Fengqian a thumbs up, and at the same time did not forget to squeeze Tang Yunzhen next to him. "Much stronger than you were back then!"

"If you praise the wind, you will praise it, and you will not step on it. Tang Yunzhen pursed his lips dissatisfiedly, but seeing that Cheng Fengqian had already acted quickly, he went to the kitchen and brought over a roll of tin foil that had not been used up, and admitted from the bottom of his heart that Cheng Fengqian was indeed much more active and serious than himself when he was a newcomer.

"Team Tang, Sister Feifei, only this volume has been opened. Cheng Fengqian handed the tin foil to Zhou Yanfei.

"Although the serrations used to cut the tin foil are the same, because different people use different forces and angles of force, the piece that is torn off is still unique. Of course, only if you find the only piece. Zhou Yanfei looked back and forth, and then handed it to Tang Yunzhen. "After dawn, you can take someone to find it, according to the time of death given by my senior brother, check the wind direction and speed at that time, and combined with the specific data of the floor here, you should be able to lock a general range out, and it is not a blind search everywhere." ”

"Hmm. Tang Yunzhen nodded. "Give these data to Xing Ye, and you can find out the scope in a few minutes. ”

"Yes, I almost forgot that there was also Xing Ye, a god assist. Zhou Yanfei suddenly smiled. "Thinking about it this way, everyone in your team is more useful than you, how did you get into this position?

"You say I'm a moonlight clan, where do I have money to stuff?" Tang Yunzhen pulled Cheng Fengqian next to him and said. "Ah Feng, you say, I am such a handsome guy with personality and charm, and I have a lot of advantages, why can't you Sister Feifei see it? Is she blind?"

Zhou Yanfei rolled his eyes at Tang Yunzhen, didn't bother to pay attention to him anymore, snorted coldly and turned around and went out.