After leaving the temporary command center, Xiao Ran took Zhang Lei to the downstairs where Niu Kun's family lived.

Because the community is relatively old and there are few people cleaning it on weekdays, not only are the downstairs messy, there are various electric cars, waste, etc., but the ground is also covered with dust. Except where people often walk by, you can see the ground, the rest of the ground is covered with a thin layer of dust.

When Xiao Ran came downstairs, he did not immediately go upstairs by taking the elevator, but looked around the entrance with his head down, squatted down from time to time, and twisted up a tuft of dust to check carefully.

"What's wrong?" Zhang Lei squatted beside Xiao Ran and asked.

Xiao Ran frowned slightly, looked at the twist of dust on his fingertips for Zhang Lei, and asked, "Did you see it?"

"What did you see? What did you let me see a layer of dust?" Zhang Lei was confused.

Xiao Ran bounced away the dust from his fingertips, stood up and tidied the recorder on his chest, and said with a blank expression: "You didn't look carefully. There are a very small amount of pepper particles in it."

“Pepper granules?”

Zhang Lei didn't understand why there was pepper in the dust. Even if someone's pepper was sprinkled in front of the building, what was the connection with the case?

It was not until he followed Xiao Ran into the creaking elevator that Zhang Lei understood what Xiao Ran said and shouted in surprise: "You mean... which family of pepper was sprinkled with this pepper? Cover the smell and prevent the police dog from tracking it down?"

“It’s possible, but not necessarily.”

Xiao Ran said without comment: "The best way to avoid police dog tracking is to have water flow barriers, followed by sulfur powder. However, the sky is dry and the community is used to being dirty and messy, so it is too conspicuous to use water to wash it. In addition, the color of sulfur is obviously contrasted with the color of soil, and the color of pepper is very similar to the color of dust."

"But, there is not much scattering. Besides, even if you sprinkle that small piece, how could the police dog's nose not be tracked?" Zhang Lei was a little unbelievable.

"Who knows, dogs are dogs after all, and they won't tell people, 'The smell here is too choking, I can't get over'."

Xiao Ran responded casually, but he was thinking about a deeper question in his heart, that is, who sprinkled the pepper on the ground?

Use pepper to cover up the smell and avoid tracking of police dogs. Except for those who are more interested in criminal investigation, most ordinary people who live normally do not know this.

Even if you know this or have learned it on search engines, for the suspects, in that highly tense atmosphere, even the habitual offenders who often deal with the police rarely consider covering up their own scent.

As for sprinkling pepper downstairs, Xiao Ran was more inclined to think that this was not what he thought of after committing the crime. He should have planned it long ago or even made plans carefully.

However, through the surveillance footage of the day, Xiao Ran knew that Niu Kun's family was unaware of it before Yan Yuehan's accident. Niu Kun's parents and grandfather found something abnormal at home after returning home. Will they think of sprinkling pepper downstairs to cover up the smell?

Obviously it is impossible. Not to mention that Niu Kun's family's interests are relatively low-end, assuming that Niu Kun's family saw such a terrifying scene after they arrived home, they were scared to death. How could they think of covering up the smell?

Therefore, after eliminating the small probability situation, there is only one high probability possibility left: the pepper powder is sprinkled by Niu Kun!

However, how did a young man who was in the third year of junior high school and had almost never had much contact with society. How did he develop such a strong sense of anti-reconnaissance?

Either he is very interested in criminal matters and has long been harmful to others. He has started to make meticulous plans very early. With the current precocious puberty of children, his IQ at the age of 16 is enough.

Or there is another possibility, combined with the faceless case that Ruan He once guided... So, will Niu Kun be a newcomer taught by a criminal organization?!

Thinking of this, Xiao Ran's eyes suddenly tightened, and he couldn't help but want to call his colleague in the Internet Supervisor to ask, but the elevator had stopped and the floor where Niu Kun's house was located had arrived.

The elevator door was opened with difficulty, Xiao Ran looked at Zhang Lei and nodded, Zhang Lei understood.

When they opened the recorder, the two of them came to Niu Kun's house. Before they knocked on the door, a faint fragrance penetrated into their nostrils. This was the smell of dishwashing liquid. It was obvious that Niu Kun's house had undergone one or more major cleanings.

Xiao Ran and Zhang Lei sorted out their expressions, looked very natural, and raised their hands to knock on the security door of Niu Kun's house.

However, after knocking on the door, no one responded or sounded. So Xiao Ran knocked again, and then there was a male voice with nervousness hidden in the calm asked, "Who?"

"We are from the police station and we are visiting on a routine basis." Xiao Ran said according to the original plan.

"Oh, okay... it's here." The man paused, and after a moment, he carefully opened the door.

"Comrade Police, hello, hello..."

The one who opened the door was Niu Kun's father Niu Kougui. He wore a thin cardigan on his upper body, rolled his sleeves to his arms, wore a pair of jeans on his lower body, a pair of cloth slippers on his feet, and a smile on the corner of his mouth, but he smiled a little unnaturally, and a trace of panic flashed deep in his eyes.

Obviously, he has not studied how to control expressions, and the actor's cultivation failed.

Xiao Ran raised his hand to show his ID. Of course, what he showed Niu Kougui was the front, negative positions, police ranks and other contents of Niu Kougui.

"Please come in...please come in..."

Niu Gui looked enthusiastic and led Xiao Ran and Zhang Lei in, pretending to be ignorant and asked, "Didn't you just asked me two days ago? Why did you ask again?"

"Oh, there's no way. Isn't this the little girl in the neighborhood abducted by human traffickers? The superiors urged her to visit again. The leader moved his mouth and ran away, and we were just messing around all day long!"

Xiao Ran pretended to be perfunctory and said complainingly, in order to reduce the vigilance of Niu Kougui's family, and at the same time observed the situation at Niu Kougui's family.

The house was cleaned up very clean and the floor was polished shiny. Xiao Ran knew this before entering the door. In addition, in the Niu family's living room, two large suitcases were crossed by the wall, and the zippers were not pulled up, and the clothes could be vaguely seen.

As for the others in the Niu family, Niu Nonggui's wife Tian Michun and his father Niu Man were sitting at the dining table eating, but they had already put down their chopsticks and walked over. Niu Kun, who was observing Xiao Ran, leaning on the sofa and playing games.

When Xiao Ran and Zhang Lei first came in, Niu Kun turned his head and glanced at them contemptuously, then continued to play with King of Pesticides expressionlessly, without any sign of nervousness.

When Niu Gui called Xiao Ran and Zhang Lei to sit down, Xiao Ran casually raised his hand and pointed to the two large suitcases and asked, "Are you... planning to go out for a long distance?"

"Ah...yes, yes!"

After hearing Xiao Ran's question, Niu Tenggui's tone was a little trembling, and then said, "The child is not feeling well and often calls for headaches. Our hospital has checked several times and found nothing. I asked about other hospitals and took the child over to take a look."

"Oh, that's how you look at it, your body is the most important thing."

Xiao Ran chuckled lightly, looking relaxed and big, but in fact the muscles in his body were already in preparation. He opened his notebook and took out a pen and asked, "That won't waste your time, I'll leave after I understand the situation."

After learning about Niu Gui's family normally, Xiao Ran asked: "Where are you doing and what you are doing at 4 pm on the 16th?"

"Oh, I asked before. My wife and I accompanied my dad to the hospital for examination. We were always in the hospital. When we came back, we heard that a child was lost. Oh, we were nervous at the time, and we thought my child was gone."

Niu Jungui said smoothly, his wife next to him was still asking for help, "That's right, I was so scared that my face turned pale." As for Niu Jungui's father Niu Man, he sat at one end of the sofa, expressionless, and was stunned.

At this point, Zhang Lei looked at Niu Kun and asked half-jokingly: "Little brother, where were you at that time? What were you doing?"

When he heard this, Niu Gui and Tian Michun were both stunned. Tian Michun snatched the words: "Comrade Police, why do you ask him? He is just a child. He hasn't finished junior high school yet. What can he understand?"

"This... is still in junior high school, I look like I'm in college?" Xiao Ran pretended to be surprised.

Tian Michun said repeatedly: "My child grows up early, and he will be better than other children when he is born."

"Oh, but I still have to understand. The leader's instructions have to investigate both adults and children. Our leader said that the possibility of minors committing crimes is not ruled out..."

Xiao Ran said with a chuckling, but had noticed the unnatural nature of Niu Jungui's words and deeds. He turned to look at Niu Kun and said, "Where were you at that time, what were you doing?"

"I was at home and played games." Niu Kun didn't raise his head and said indifferently, the game in his hand was never stopped.

Xiao Ran nodded, looked at Niu Gui and his wife, and was about to speak again, Zhang Lei asked according to the plan: "Hey, where is your toilet? I'll make it easier."

"Oh, that door." Niu Tenggui pointed stiffly at the toilet door.

Zhang Lei got up and walked over, saying as he walked, "Oh, your house is cleaned so clean. The floor is polished and shiny... Your house has just been renovated, and the walls are the same as newly painted..."

"Ah...yes...yes, yes..."

Niu Guiqiang responded with a smile, but his wife Tian Michun's face was already showing fear. Xiao Ran still pretended to be unsuspecting and asked some irrelevant questions.

Zhang Lei came out of the bathroom, sniffed his nose and sat down, "Your bathroom has washed too much water, why does it smell fishy?"

"Is there any? No, you smelled the wrong one. It should be the smell of my wife's cosmetics..." Niu Tenggui explained in a hurry.

"Maybe I smelled wrong." Zhang Lei nodded.

"What I wrote was hurting, it's your turn to remember."

Xiao Ran shook his hand, whispered Niu Genggui and his wife, and handed the paper and pen to Zhang Lei.

Then he turned his head and looked at Niu Kun and said, "Little brother, you said you have been playing games at home one day. Did you go downstairs in the middle? I heard from an old man, you seemed to be playing with a girl downstairs that day?"

As soon as these words came out, Xiao Ran noticed that Niu Gui's hands suddenly clenched: "By the way...what, I haven't even prepared a glass of water after talking for so long. I'll pour you two of them!"

"Thank you, thank you."

Xiao Ran did not refuse, and let Niu Genggui walk towards the water dispenser behind him, but the corner of his eyes was always paying attention to the surroundings, his whole body was tense, ready to explode at any time.

"Little brother, you haven't answered my question yet. Did you play with a little girl downstairs that day?"

Xiao Ran asked, pulling his coat and covering his right hand to touch the pistol, because he had noticed the cold light deep in the eyes of Niu Gui's wife Tian Michun, and the slight and slowly rubbing behind him, slowly approaching the soles of the shoe.

Niu Kun put down his phone and looked at Xiao Ran meaningfully: "So what if it's me?"

"Host, dangerous!"

The system prompt suddenly came, but there was no need for the system prompt. Xiao Ran had already opened from Niu Kun's pupil to Niu Kuanggui, who raised his hammer behind him.

Xiao Ran's movements were like lightning. He stood up and turned around in an instant, raised his hand to point the dark muzzle at Niu Gui who was gritting his teeth and preparing to start.
Chapter completed!