Zheng Wanjiang looked at the scene inside and outside the house, and finally, his eyes stopped on the latch of the rear window, the latch did not turn back into place, he looked at the hanger that fell on the ground, to see the specific position, he used the manual action of the latch is very flexible, then he found that there are a few small pieces of shredded paper next to it, torn particularly neatly, and the force is relatively large. Zheng Wanjiang pondered carefully for a while. Lifting the latch gently, then stuffing the shredded paper into the hole, the latch was secured, and he gently shook the latch with his hand and fell naturally.

Zheng Wanjiang understood, he fixed the latch again, came to the window, first closed one window, and then gently pushed the other window shut, closed it, and then gently shook the bottom of the window with his hand, only to see that the window had been plugged in. He knew the mystery of this, he looked around the window again, but found no traces, he looked up at the window, and found two white lines on the lattice, and saw that there was a nail tip on it, he gently removed it with tweezers, and put it in the observation bag, there was a trace of blood on it, and carefully removed the blood stain sample.

Zheng Wanjiang returned to He Jinqiang's room, Huang Limei and Sun Yaozhang were still continuing to check, Zheng Wanjiang came to the bookshelf, and found that a book had obviously been moved, he carefully took it off, and the book was torn off a piece, which was the few pieces of shredded paper by the window latch. It can be seen that the person who infiltrated the room twice was very familiar with the environment in the room, and this should be the same person.

"Before we came, who had ever entered He Jinqiang's house?" Zheng Wanjiang asked.

"No, Jin Qiang didn't come back, and no one entered his room." Du Yuelan replied affirmatively.

"Let me ask you, who of you have entered his room before today, and have you noticed any unusual movement in the room during this time?" Zheng Wanjiang asked.

Du Yuelan shook her head, and then He Fang said: "One night at two o'clock, I went to the bathroom, and when I came back and passed by my brother's room, I heard a slight noise, and after. There was no movement, I thought it was a mouse touching something, so I didn't care. ”

"What time is it?" Zheng Wanjiang asked.

"It should be on the night of the 18th, because I have to go to the Beijing wholesale market at five o'clock in the morning to buy goods." He Fang replied.

"Has He Jingang stayed at home these nights? Have you been back during the day? Zheng Wanjiang asked.

"He has always lived in the unit, and he rarely goes home, but sometimes he goes home for dinner. He hasn't been back for a few days, and we haven't seen him. Du Yuelan told Zheng Wanjiang.

"So do you have a time to leave the house during the day, which means that there is no one at home during the day?" Zheng Wanjiang asked.

"Sometimes there is no one at home in the morning." Du Yuelan said.

Zheng Wanjiang nodded thoughtfully, someone had entered He Jinqiang's room during this period.

"Before Jin Qiang's accident, did Lao He quarrel with Jin Qiang?" Zheng Wanjiang asked.

"It's all blamed on that old thing for being confused, disgusted that Qiulan is a rural girl, and the economic conditions are not good, I am very opposed to his approach, and living in the future is a major event in their lives, as long as they are satisfied, we can't follow him for a lifetime, often say that his children are in their own hands, don't interfere too much, and if you don't do it, you will complain, as long as the two of them live better than anything, it doesn't matter if you have money or not, but he just doesn't listen, and often quarrels with me, saying that I have long hair and short knowledge, and feelings can't be eaten, there is no money to take anything to get by. His temper is too explosive, just ignite the fire, I can't talk about him, there is really no way to take him, so I have to let it go. Du Yuelan said.

"Captain, come and see, there's a scarf here." Huang Limei shouted. Zheng Wanjiang heard Huang Limei call him, and hurriedly walked into He Jinqiang's house, "Look. Huang Limei clamped a white gauze towel with tweezers, Zheng Wanjiang sniffed it, and there was also a strong smell of perfume on it, and the smell was particularly strong.

"It was found under the bed." Huang Limei said.

"No wonder I smelled perfume as soon as I entered the house." Zheng Wanjiang said.

"Do you know this white scarf? Who will it be? Zheng Wanjiang asked Du Yuelan's mother and daughter, "I seem to have seen it somewhere, but I can't remember it for a while." He Fang recalled.