Following the direction of Zhu Xingxing's finger, Zhou Ning looked over. On the shoes, there are two stains in the shape of water droplets, the area is not large, but they are in the gap at the edge of the front of the shoe, which is slightly stained with dust, and the colorful picture looks not so eye-catching.

Zhu Xingxing saw that everyone was just watching, and there was no excessive reaction, and he said a little anxiously: "Oh, when I look at big men, I don't like to drink sweet things, I like to drink milk tea and milk-like things, and I often get on my body, and the color of these traces will be slightly yellow, I think this is milk stains." Da Zhao was a little suspicious, so he leaned over and took a look.

"You also said that girls like to drink sweets, isn't she also a woman, and it's normal to get shoes, right? And at Zhang Bo's house, we carefully investigated the scene, and there were no shoe prints other than slippers on the ground. Zhu Xingxing raised his shoes and sniffed them, not caring that they were shoes at all, and then said firmly: "I insist on my opinion, I think these two traces are milk stains, and they are that kind of formula milk, although I didn't go to the scene, but I believe in my sense of smell, this milk is very sweet, I don't believe you smell it." Zhou Ning waved his hand.

"Put the shoes on, take them back for sampling and comparison, and thoroughly survey the room to see if there are any other traces left." Zhu Xingxing raised his chin towards Da Zhao, Zhou Ning's recognition of the person made her very happy, and everyone began to search the room separately, in fact, it was obvious that the room had been thoroughly cleaned, and the marks of the water stains drying up when the mop wiped the floor were all left on the ground.

Zhou Ning did not go to the various rooms, but stood in front of the shoe cabinet, wearing gloves, the entrance door was open at this time, Liu Yufei and Ye Chengchen were standing in front of the elevator, and she could see all the movements here.

Turning around and glancing at Ye Chengchen, she quickly avoided her gaze when she saw Zhou Ning looking over. Zhou Ning looked back and thought about it, Ye Chengchen's evasive gaze was a sign of trying to restrain herself, she was very nervous, so did she say that where she was, what did she want to hide?

Or was he in a hurry and forgot to cover up? Thinking of this, Zhou Ning's shoe cabinet opened, and the shoe cabinet was full of shoes, and the shoe cabinets like two large wardrobes were full, and Da Zhao was able to find the pair of dad shoes at once, which was really amazing.

Scanning up and down, I didn't see anything special, Zhou Ning opened the drawer in the middle of the shoe cabinet, two drawers, one was full of shoe brushes and shoe polish shoe polish cloths or something, and the other had various bags, silver ion deodorant, and a few boxes.

Lifting the lid of the box, there are bags of various scents inside. Not to mention, the life of a model is exquisite, and there are so many words about the smell of shoes, as Zhou Ning opened the last box, some bundled shoe covers in it attracted his attention.

Zhou Ning suddenly turned around and looked at Ye Chengchen at the elevator door, and Ye Chengchen was also lowering his head, secretly looking at Zhou Ning, just like that, her snooping eyes were caught by Zhou Ning.

It seems that this is one of the reasons why she doesn't want to be searched, why are there so many shoe covers when she has guest slippers at home, and it looks like she has only opened one bag.

Zhou Ning didn't speak, shoe covers-dad shoes-footprints-milk stains...... Could it be that after Ye Chengchen disguised, he went to the fifteenth floor from the corridor, waited for Zhang's mother to go out, and then went to Zhang Bo's house, in order to avoid the police search, and in order not to leave traces, she put on shoes and put them in the slippers, in fact, as long as the slippers are big enough, this kind of operation is also possible.

However, how to explain milk stains? Zhou Ning frowned, closed his eyes slightly, and tried to change the scene.

In front of him, it is already the entrance of Zhang Bo's house. Hanging his head slightly, the pair of dad shoes with shoe covers, stepped on the slippers when he entered the door, pulled the slippers, entered the baby fence area in the living room, stepped in, and picked up the boy, but the shoes were too big, the child also cried, and the bottle in the child's hand overturned.

The milk was poured directly into the inside of the slippers, but there were no milk stains on the surface, and the child was carried by the waist and walked straight to the master bedroom.

Then he carried a child with Zhang Bo, went straight to the master bedroom, and threw it out of the window, but the boy struggled badly, before he got out, he was already head-down, and his hand with long nails wanted to adjust the direction, and grabbed directly at the root of the boy's thigh, but at this time the child also took off.

In a hurry, the person who was pulling the slippers ran to the door quickly, took off the slippers, only to find that the shoe covers were a little wet outside, but he didn't care, pulled off the shoe covers, held them in his hands, and left quickly.

Zhou Ning opened his eyes, he was silent, and Da Zhao and several people also came out after surveying, seeing Zhou Ning's serious expression, they were a little puzzled, and Zhou Ning closed the door of the shoe cabinet.

"Did you find anything?" Da Zhao held up a few physical evidence bags, and said while introducing: "The residue in the vacuum cleaner and on the mop has been extracted, and some short curly hairs have been found, which feel like shade hairs, and lip prints on the edge of the cup have been collected, not lipstick, and nothing else has been found." Zhou Ning nodded, he understood what Da Zhao meant, glanced at the hair, it should be male, and he waved his hand directly.

"Go directly to Zhang Bo's house on the fifteenth floor, let Liu Yufei and them wait here, let's go!" Saying that, everyone went out, and Liu Yufei naturally heard their conversation and hurriedly said.

"Zhang Bo's house is already closed, and Ma Liang is staying at the door, you can go up directly." Zhou Ning didn't talk nonsense, he didn't take the elevator with people, this time he climbed the stairs directly, and as the door of the safe passage closed, Ye Chengchen's voice could still be heard, and he kept protesting, but nothing could be stopped.

Da Zhao leaned next to Zhou Ning, blinked and asked, "Zhou Xiaozhou, did you find anything?" Zhou Ning shook his head.

"It's not a discovery, it's a guess, in the process of going upstairs, carefully look for the footprints of Ye Chengchen's dad shoes, you look for photos, it's not that this shoe print was also found in the stairwell on the fifteenth floor."

"Well, I just compared, the size and pattern are exactly the same, but this doesn't prove anything, it can only show that Ye Chengchen once stood there." Seeing that Zhou Ning didn't speak, Da Zhao didn't nag anymore, dragged Lao Yang and Wang Jiji, searched carefully all the way, and indeed found a few Ye Chengchen's shoe prints at the corner of the steps.

All the way to the fifteenth floor, Xiao Zou and Xiao Pang were already breathing, and Da Zhao glanced at them.

"I said exercise your body, I climbed seven floors, and I didn't come up in one breath, so I gasped like this, can you do it, are you kidney deficient?" Zhou Ning slapped Da Zhao, Da Zhao shut up, and sure enough, at the door of the stairwell, he saw four or five shoe prints, and the edge was circled by Da Zhao with chalk, it seems that people really don't come here often, and after a day, the chalk imprints are still intact.

Zhou Ning stood behind the shoe prints, and looked towards the elevator on the fifteenth floor, the doors of the two houses, as well as the elevator door, could be seen at a glance, and sure enough, this was a very private corner, and the movement of this floor could be found at any time.

"1501 is uninhabited?"

"Well, the owner of 1501 went abroad, and we contacted the property that day and asked about the situation." Zhou Ning pushed the door and came to the 1502 door, and Ma Liang quickly got up from the small horse.

"Director Zhou, you're here, I'll open the door for you."

"Did the Zhang family come over to make trouble?" Ma Liang shook his head.

"Zhang's father and mother came over to get something, I asked people to take it for them, and some neighbors came to peek, but they were all sent away, and no one else came around." As he spoke, the door opened, and a surging fishy smell came out.

When I came in yesterday, it seemed that it was because the window was open, so I didn't notice the smell, Da Zhao rubbed his nose and bumped Zhu Xingxing.

"What's the matter, you smell this fishy smell?" Zhu Xingxing glanced at him.

"I'm not stupid, I can't smell such a pungent fishy smell, I can still smell milk, a very familiar milk smell." Zhu Xingxing didn't come to the first scene yesterday, so Zhou Ning was also a little surprised.

"Okay, let's start surveying again, check the slippers carefully to see if there are any shoes with milk, I'm not talking about the soles, but the inside of the shoes."

"Inside?" Zhu Xingxing kicked Da Zhao, gritted his teeth and said, "What does the boss say, just do it, why do you talk so much nonsense?" Hurry up and investigate, I smell the shoes. Da Zhao rubbed his nose, dressed honestly, and entered the room, leaving Zhu Xingxing and Zhou Ning at the door, Zhu Xingxing crossed his fingers and squeezed the air in the gloves clean, and then squatted down to check the slippers.

There are a lot of slippers under the shoe cabinet, only a pair of red ones look relatively small, Zhu Xingxing picked it up and looked at the soles, and then put them on the side, these soles obviously have traces after sampling.

Zhu Xingxing began to check one pair at a time, and looked around the slippers on the ground, none of them had milk stains on them, Zhou Ning frowned slightly, and at this time he was a little suspicious that his guess was accurate.

At this moment, Zhu Xingxing opened the shoe cabinet and found that there were slippers inside, but these were heavier cotton slippers, and she didn't dislike the heavy smell of sweaty feet, so she sniffed it around and made a sigh.

Zhou Ning hurriedly squatted down and approached, following Zhu Xingxing's gaze.

"Found the taste?" Zhu Xingxing glanced at Zhou Ning with a hint of grievance.

"Boss, are you using me as a police dog?" Zhou Ning was a little embarrassed, and before she could say anything, Zhu Xingxing had already taken out a pair of shoes with a smile, raised them and pointed to a shiny thing and said, "What do you see I found?" Zhou Ning glanced at it, it seemed to be a metal iron chain with two pieces of bow, in the adjective that Xia Momo often said, it was Bling Bling's, it looked very shiny, but is this the decoration of slippers?

"What is this, the slippers look very rustic, this is deliberately pasted?" Zhu Xingxing shook his head and lifted the slippers.

"I was going to draw blood for Ye Chengchen at the time, Da Zhao cut her nails, I remember that she had such a thing on her nails, but her left hand was missing one, it seems that it was scraped here, hey! Boss, these shoes smell of milk! Zhou Ning was a little excited and looked down, but it was visible to the naked eye, and there was no trace of milk.

"Are you sure?"