"Uncle Yu, how do you know?" Bai Tianqing looked at the mouth of the sewer in shock, and couldn't imagine how Yu Qian suddenly chattered, jumped out of Ma Wen and pinched something in his hand, and then came to the conclusion that he fell here.

"I won't tell you, guess." Yu Qian looked at it intently and said casually.

"But there's a reason for that, right?" Bai Tianqing asked unwillingly.

"I'm not sure, but that's all there is on the scene, what can I do but guess?" Yu Qian shrugged, pressed his pocket with his left hand, and his tone was full of excitement: "But today's harvest has been a lot." ”

Bai Tianqing only listened in the clouds, and reached out to touch the chair next to him.

"Don't touch it with your bare hands!" Yu Qian turned his head and saw that he was in a hurry, and stretched out his hand and pointed to his gloves, "Don't touch it, it will destroy the scene." ”

"Oh oh oh!" Bai Tianqing hurriedly retracted his hand, "Uncle Yu, when did you wear gloves?" ”

"When you enter the door and put on your shoe covers."

"Oh...... Uncle Yu, do you think I'm not qualified as a criminal policeman? ”

"Hmm."

"Oh......" The mourning voice came from behind him, and Yu Qian turned his head to see Bai Tianqing's face full of frustration.

"Come, Xiaobai, come here." Yu Qian beckoned and motioned for Bai Tianqing to squat next to him, "Xiaobai, what's wrong?" ”

"Uncle Yu, since yesterday, I feel that I don't understand anything, I don't say a word right, I don't do a job correctly, what you said to me is really not suitable for being a criminal policeman, Uncle Yu, do you say I'm very useless, completely hopeless......" Bai Tianqing's head bowed and quickly entered the ground, and the urn said angrily

"Well, that's the truth." Yu Qian was stunned for a moment, and said with a smile, "Blame me, I haven't taught you anything, compared with those who graduated from the police academy, you do have close to zero knowledge of the criminal police industry, but..." Yu Qian said in a tone, "I am not from a professional class, when I first became a criminal policeman, I was more unbearable than you." ”

"Really?"

"What's true or false about this, I'm a criminal policeman who was transferred from the army, and I was a little out of touch with society as soon as I came out of the army, and I entered the police force again and said that I didn't fit in with the surroundings, in fact, I was even a word at the time." Yu Qian clicked a little Bai Tianqing's notebook, "It's not as good as what you write." ”

"Poof!" Bai Tianqing suddenly laughed: "Uncle Yu, your handwriting is quite ugly now." ”

“……”

"Uncle Yu, you go on, I was wrong..."

"Whether you are a criminal police officer or something else, the important thing is to have a heart that studies hard... I guess you listened to your teacher in school, and I'm not good at teaching others. It's just that you have to understand that nothing is not difficult at the beginning, as long as you are willing to work hard, one day you will suddenly realize that everything will be simpler. Don't worry, you're still young, the future is your stage. ”

"So I'm hopeful, right?"

"Putting that aside, at least now you're essential to my job."

"Essential? Uncle Yu, are you serious? Bai Tianqing Meng couldn't help but cheer up when he heard Yu Qian's words.

"Yes, less than two people are not allowed to go to the police." Yu Qian said seriously

“……”

Just when Yu Qian had a chance to instill some basic theoretical knowledge of the criminal police to Bai Tianqing, there were three rhythmic knocks outside the door, Bai Tianqing got up and opened the door, Xiao Liu carried a toolbox and flashed into the room, put on the homework tools neatly and followed Bai Tianqing into the kitchen.

"Fish team, what do you say? Where to pick? Xiao Liu knew Yu Qian's temper, and he didn't talk nonsense, so he asked directly

"Look here, can you pick it?" Yu Qian pointed to the mouth of the sewer

"If it's dry enough, there's no problem, I'm afraid of water." Xiao Liu leaned down and took a closer look, "It's good and dry, if there is, it's definitely okay, I'll see if there are any fingerprints first." ”

Xiao Liu said as he opened the toolbox, took out a watering can with a small nozzle and a small mirror similar to that used by a dentist, sprayed some powder into the mouth of the sewer, turned on the light and observed it with a small mirror

Fan Xiaoliu said in surprise, "I found it, there are really fingerprints, but they are not very complete, and it is estimated that there are also inside, but I am afraid it is very difficult to collect, it seems that there is no water here recently." ”

"I just walked through it the day before yesterday, but I'm afraid that this fingerprint was printed yesterday, and it can be collected to the extent that it can be compared." Yu Qian took out the seal from his pocket and handed it to Xiao Liu: "If this is correct, it will be more complete." ”

"No problem, give me some time." Xiao Liu took out a piece of moisture-proof cloth and spread it on the ground, lay down and began to collect.

"Hmph, I'd like to see where it's sacred." Yu Qian sneered twice, beckoned Bai Tianqing to withdraw from the kitchen, and gave Xiao Liu the space to work

"Uncle Yu, what's going on? If you don't say anything else, you're going to kill me in a hurry," Bai Tianqing asked urgently

"The seal at the door was carefully torn off and pasted back, since the landlord had been told to unseal it yesterday, if the landlord did it, there was no need to paste it back. And if Ma Wen really pinched something in her right hand before she died, then the person who knew the existence of that thing and personally went to the scene of the crime to find this thing must have a major connection with Ma Wen's death! And after watching the scene, what can be held by Ma Wen in her hand may be the thing in the express! There are two things that need to be done now, one is to determine who came to take the item, and the other is to find out what the item is. Yu Qian's reasoning was preliminarily verified, and he couldn't help but perk up and told Bai Tianqing his analysis.

"But if for Ma Wen, that item is so important that she refuses to let go no matter what, then how can she let go and fall into the sewer before she dies? Shouldn't you be able to hold it tightly? Bai Tianqing thought about it and asked

"It makes sense to say that's true, but if it makes sense, the case should have been closed. My inference is only based on imagination, but now I can confirm that someone sneaked into the scene of the crime yesterday and took something out of the sewers, and it is always right to find out. Yu Qian didn't care about Bai Tianqing's question

"Now let's go and return the keys first, ask the landlord if he came here yesterday, and then check the surrounding surveillance video to see if there are any suspicious people entering or leaving."

"Fish team, after picking, where else?" As he was talking, Xiao Liu came over with a toolbox

"You go back to the police team now, compare the fingerprints in the sewer with the seals, and find out the same one, I'll use it when I go back, don't tell anyone else."

"I understand the fish team, I will go back to the police team, and the results will be available by tomorrow morning at the latest, but the fish team..."

"Don't worry, I can't lose you, I'll invite you to dinner when I go back."

"That's not what it means, Fish Team, everyone actually knows why you are angry, the system belongs to the system, and the love belongs to the feelings. I can't represent anyone else, but if you say a word, I'll be there for you. Xiao Liu looked at Yu Qian and said seriously

"You kid don't give me this set, no matter how good you say, you won't add two more dishes when you hear it." Yu Qian waved his hand, "Go back quickly, I really have to let you inspect two more pieces when you go back." ”

"That's two more dishes." Xiao Liu went downstairs with a smile

"Let's go, let's get the keys back." Yu Qian waved his hand, and the two of them left the rental house and went straight to the landlord's aunt's house.

Yu Qian hurriedly walked upstairs, took out a water-based pen, carefully dried the fingerprints on it, inserted it into his pocket, and reached out and knocked on the door. The landlord and aunt were not on guard this time, and opened the door to invite Yu Qian and Bai Tianqing to sit in. Yu Qian politely refused, and the TV went on in the living room, and there was the sound of babbling Kunqu opera.

"By the way, have you been to the house since the lockdown was lifted yesterday?" Yu Qian pretended to ask casually while handing back the key

"Who dares to go! Eh, I'm worried to death, comrade, how can you rent this house in the future, I'm thinking about finding a master to do it, maybe, that girl's soul is still in it, babble, I'm scared when I think about it, why do you say I'm going to do such a thing..."The landlord and aunt chattered endlessly at the mention of the house. Yu Qian took out a pre-written receipt and a water-based pen and handed it to the landlord

"This is a receipt for using your key, you can sign it if you see that there is no problem"

"Is it here?" The landlord didn't think much about it, and took the water-based pen and signed her name

"Have you taken back all the keys you gave to your guests?" Yu Qian looked at the landlord who was signing, and suddenly asked

"Take it back, but maybe she's got a few of her own, right? I don't know if there's anything else. The landlord thought for a moment and replied, then began to complain again

"Thank you for your support and cooperation" Yu Qian decisively cut off the aunt's complaints, put away the pen and paper, said hello, and led Bai Tianqing away.

As long as it is confirmed that the fingerprints on the pen are different from the fingerprints just extracted at the scene, then it can be determined that a mysterious person entered the scene of the crime yesterday and can easily open the door of the scene, it seems that this mysterious person is very likely to be someone close to Ma Wen.

If the fingerprints are consistent, then the landlord aunt not only lied, but also took that important thing, and the case has undoubtedly taken a huge turn for the better regardless of the outcome! Yu Qian now only hopes to get enough evidence before Ma Wen's mother arrives on Monday, at least to pull Ma Wen's mother into his camp.

"Uncle Yu, where are we going next?"

"Visit, check and prosecute, put your face on me for a while, don't talk nonsense!" Yu Qian turned his head and warned, and strode into the community supermarket.

"Hello, what do you buy?" The supermarket owner saw a big man with a sinister face walking straight towards the cashier with an expressionless white young man, and he immediately panicked, and hurriedly got up and asked

"I'm a police officer." YU QIAN TOOK OUT THE POLICE CERTIFICATE AND SAID COLDLY, "THE MURDER THAT HAPPENED IN BUILDING XX 304 ON FRIDAY, YOU KNOW, RIGHT?" ”

"Yes, yes, comrade, what are you?" The supermarket owner was suddenly shocked by Yu Qian's aura, and thought to himself that I didn't do it, why was this so fierce to me

"I'm going to ask a few questions." Yu Qian took out his notebook, and when he touched it, he found that the pen was in his own evidence bag, Bai Tianqing quickly took out a tube of pen and handed it over

"On the day of the crime...... Yu Qian asked a few common questions casually, the supermarket owner had already been asked that day, and at this moment, he was answering the right questions fluently, but he didn't panic.

"Let me ask you, have you seen any suspicious characters coming in and out these days?" Yu Qian turned his words around, stared at the boss and asked

"These days... The words of the past few days..."The boss shuddered as he was stared at, and hurriedly recalled, "Uh...... There's nothing suspicious, and a few couriers and takeaways are also acquaintances...... Ah, I remember, on the night of the accident, there was a young man, wearing a suit, driving a BMW X5, about 6 o'clock. I stopped at that place, and then I went up to Building XX, and I came down after dinner. I walked around the neighborhood a few times before leaving. ”

I didn't expect to ask what I wanted the most so smoothly, and I followed the supermarket owner's expectations, and the car was parked opposite the supermarket door, no wonder the supermarket owner was so impressed. Yu Qian closed the notebook and said

"I'm going to call up the surveillance at the door on Friday afternoon, please cooperate."

"Okay, no problem, your Notice of Discovery?" Yu Qian originally wanted to bluff and scare the boss, so he called up the surveillance video. Who knew that the boss was indeed frightened enough by his momentum, but in the end he didn't forget to ask him for formalities.

The two of them stared at each other for a while, looking at each other speechlessly. When Yu Qian was thinking about not scaring anymore, someone shouted behind him

"Yo? Brother Yu? Why did you come to visit me personally? When I turned around, I found that it was the director of the XX Community Police Station

"Old Wu, I can't help it..."Yu Qian thought about it for a while, turned around and put his arm around Director Wu's shoulder, pulled it to the side, and pointed at Bai Tianqing

"The son of Superintendent Bai, send me this exercise, why don't I pick a small case to take him to practice, I am in a hurry to go and fall into the game..."

"Well said!" Director Wu waved his hand, "What's the matter, Lao Bai, Captain Yu of the Criminal Police Brigade of the City Bureau, transfer your door monitoring to take a look, and by the way, you can bring me a box of Yuxi." ”

As he spoke, he slapped the twenty yuan on the cash register, and turned his head to close to Bai Tianqing, who had a long face next to him

The supermarket owner is naturally familiar with the director of the community police station, and he let down his guard and does not urge the formalities.

Yu Qian finally managed to go around the counter, watching the supermarket owner transfer the prosecution, and his heart was ruthless

"Finally got me the tail!"