The King of the City

"Please give me the mineral water in your hand." Lin Chen said to the old detective.

The old criminal policeman handed over half of the mineral water in his hand with some doubts. After Lin Chen got it in his hand, he opened the bottle cap and poured some sand in his hand into the bottle.

Everyone looked at Lin Chen's move curiously, and didn't understand why he put sand into the mineral water bottle.

After getting some in, Lin Chen shook the bottle a few times, the water and sand in the bottle shook, and the water suddenly became a little cloudy.

Lin Chen handed the mineral water bottle back to the old detective and said, "You can taste this water, you don't need to drink it, just feel it with your tongue."

The old detective frowned, but the mayor watched from the side.

"Bah ah..." The old detective spit out the water that was in it.

Lin Chen asked, "What does it taste like?"

037 Will you smoke [for collection]

After the old detective heard Lin Chen's question, he pouted again and said, "The water mixed with sand is a little salty..."

"Yes, it's salty."

Lin Chen snapped his fingers, with a smile on his face, he pointed to a pile of sand in the distance, and said, "Sand is not a common thing, but there are different types."

"Sand includes mountain sand, river sand and sea sand. It is also sand, but sea sand cannot be used as building materials."

"The salt content of sea sand is relatively high, and the chloride ion exceeds the standard, so sea sand is highly corrosive. It not only damages the concrete itself, but also destroys the passivation film of steel bars and corrodes steel bars. The useful life of sea sand is longer than that of normal buildings. It's less than half, and many buildings have exposed mottled steel bars because of the use of sea sand."

"Sea sand cannot build houses, but black-hearted businesses and developers will still use sea sand as building materials, because the low price of sea sand allows them to obtain more profit."

Lin Chen's eyes turned to the landlord, and he said, "The sand you brought here is sea sand."

Before waiting for the landlord to say anything, Lin Chen looked at Bao Qingshan and said, "And the sand embedded in the anti-slip texture of your leather shoes is sea sand. Although our Tianhai City has the word "sea", but we It's not a coastal city, and the sea sand is not found everywhere."

"Bao Qingshan, tell me, why is there sea sand on the rooftop and sea sand on the soles of your shoes?"

Bao Qingshan stared at the photo of the sole on Lin Chen's mobile phone screen and looked at it again and again. He said in a panic, "Comrade police, the soles of my shoes are ordinary sand. Why do you say that it is sea sand, it is sea sand."

"It's simple." Lin Chen said, "Just take out the sand in the soles of your shoes and compare it with the sand on the rooftop, and you'll be clear."

"Damn, you actually sold me some sea sand, damn it." At this time, the landlord said cursingly.

No one cared about the landlord's abuse, Bao Qingshan gritted his teeth, and said to Lin Chen, "I haven't worn those shoes for a long time, even if the soles are sea sand, it might be where I got them before, no For that alone, I must have been here before."

"Yes." Bao Qingshan's wife also helped: "In the place where we lived in the past, someone built a house next to it, and we walked there every day, maybe those who built the house used sea sand. "

Facing the couple's rebuttal, Lin Chen smiled, and he calmly asked Bao Qingshan, "Do you smoke?"

"I used to do it, but I have given up." Bao Qingshan replied.

"Have you had a relapse recently?" Lin Chen asked again.

Bao Qingshan shook his head and said, "No, I haven't smoked cigarettes recently, and I've decided to quit cigarettes."

"This guy, the soles, the sand for a while, and now he's smoking again, and his jumping ability is too big." Miao Yunfei looked at Lin Chen's calm face and thought in her heart.

Lin Chen looked at everyone and said, "Come with me."

Everyone followed Lin Chen and came to the other side of the rooftop. Lin Chen pointed to a slightly gray and dark place on the fence of the rooftop and said, "This is the trace left by the cigarette butt pressed on it. This trace is very fresh and obvious. It was left in the past few days."

Lin Chen looked at the construction workers who were in charge of adding floors and asked them, "How many of you can smoke?"

Several construction workers waved their hands and said that they would not smoke. The landlord said for them: "Comrade police, they don't know how to smoke. I can prove it to them."

"Okay." Lin Chen looked at Bao Qingshan and said, "The deceased can't smoke, these construction workers can't smoke, and neither can the landlord..."

Bao Qingshan didn't wait for Lin Chen to finish, and said: "You mean to say that this trace of pressing the cigarette butt was left by me smoking? Please, comrade police, there are so many residents in this building, why didn't they leave it behind? , but about me?"

"First, the roof of the building is being added recently these days, and the roof is a bit messy. The average resident will not go up to the roof to smoke."

"Second, and most importantly, I found this on the ground downstairs on the side where the cigarette butt was pressed."

Lin Chen said, stretched out his hand and took out a sealed bag from his pocket. Inside the sealed bag, there was a deformed cigarette butt.

"When I came to this rooftop yesterday, I found traces of cigarette butts on the fence. Some people smoked here, but no cigarette butts were seen upstairs. I think they should have been thrown downstairs."

"So when I went downstairs, I went around this side, because this side is closer to the house next to it, the alley is narrow, and few people walk from this side of the alley, I found this cigarette butt in the alley, you Say you haven't smoked recently, right? Then you can use this cigarette butt to test your DNA, compare it with your DNA, and you'll know."

Bao Qingshan's facial expression froze at once, and his eyes were a little lost.

Zhang Tianan looked at the cigarette butts in the sealed bag, and suddenly remembered, she said, "I remember, after we went downstairs yesterday, you asked Xia Miaoyan and I to wait at the door for a while, and then left. , were you looking for this cigarette butt at that time?"

"Yes." Lin Chen said: "You told me before that you interrogated these construction workers. They said that when the construction started during the day, no one came up, which means that the cigarette butts were left on the roof at night. Come down, the roof is so messy, who will be full and come up for a cigarette at night?"

Lin Chen looked at Bao Qingshan and said, "I don't need you to speak now. Let me reason about your criminal process and how you can kill the dead while you have alibi."

……

PS: Thank you brothers for the flowers and evaluation votes. After it is on the shelves, I will write as many as possible to everyone while ensuring the quality.

038 Sole anti-slip pattern【For collection】

After Lin Chen said that he wanted to reason about the process of Bao Qingshan's crime, everyone raised their spirits and raised their ears to listen.

Miao Zhengxiong reached out and touched his chin, and said softly, "It's really not easy. You can find such subtle clues."

Under the gazes of everyone and the nervous eyes of Bao Qingshan and his wife, Lin Chen said, "Bao Qingshan, you and the deceased are friends. After the deceased asked you to invest, you invested twice, and then both earned Here comes the money."

"When the deceased asked you to invest for the third time, you chose to trust him and invested all the money you could. He told you that you would definitely make money, but unfortunately, all the money was lost."