"The boat is also an important clue." Ouyang Ping said thoughtfully.

"Yes, we have to conduct a survey of all the boats on the Qinhuai River," Guo Lao took Ouyang Ping's words and said, "Fortunately, this kind of thing can only stay on the water, and it shouldn't be difficult to find out these boats." ”

"Okay, I'll contact the Passenger Transport Department of Zhongshan Wharf tonight and ask them to send a patrol boat to cooperate with your work, with a patrol boat, your investigation will be much more convenient." Director Feng said.

"Old Guo, there are two traces of knives and axes on the neck vertebrae of the deceased, how can this be explained?" Although Ouyang Ping had his own thoughts, he wanted to hear Guo Lao's thoughts.

"According to the incision and the two knife marks on the cervical vertebrae, the tool of the crime may be an ordinary kitchen knife, if it is a sharp weapon, it is impossible to cut it three times, these two knife marks are relatively shallow, of course, there is a possibility."

"What is possible?"

"The murderer could have been a woman."

"Maybe a woman?" Ouyang Ping's eyes drew a big greeting, before, everyone didn't think of this step.

Guo Lao's next question made everyone feel even more confused: "Have you ever looked at the city wall bricks carefully?" ”

You look at me, I look at you, you really haven't "seen" the bricks of the city wall, and you can't talk about it "carefully" -- the comrades really don't take the two bricks of the city wall seriously.

"The bricks of the city wall were the only objects at the scene of the crime." Guo Lao's expression was solemn. It's really a fan of the authorities, and the bystanders are clear. Guo Lao is Guo Lao, his thinking is like radar, as long as it is an area controlled by radar, nothing can escape the eyes of radar.

"Ouyang, where are the city wall bricks?" Director Feng looked at Ouyang Pingdao.

"The bricks of the city wall are in the forensic department, and we only did a simple cleaning, but we didn't pay special attention to it."

"Very good, as long as the bricks of the city wall are still there, then good." Guo Lao took a few photos from Zuo Xiangdong's hand, and Zuo Xiangdong was looking for photos with city wall bricks among more than a dozen photos, and picked out a total of three.

"These two bricks were certainly not pryed down from the walls of the city temporary, they are not antiques, so they are not used as decorations, and people bring them home mostly to build a wall -- or a kennel or something. If these two bricks were prying off the wall, there should have been some attachment on them, and I hope the attachment is not cement - if the attachment is cement, it will be troublesome - but it is unlikely that the average person will use cement to build the wall, so it is more likely to use earth. ”

"Guo Lao is right, we have visited some people's houses, and most of them are made of mud, because they are not building small kitchens, or kennels, chicken pens, or courtyard walls." Chen Jie said, "It is unlikely that the kitchen and courtyard walls will be demolished for the two city wall bricks, but it is more likely that the kennel and chicken pen will be demolished." ”

"Guo Lao, if the attachment of the city wall bricks is soil, what information can it reveal?" Liu Wenbin said.

"The soil quality is different in different places, some places are loess, for example, near Qingliang Mountain, and some places are red soil, such as the east side of Zhonghuamen Castle, the murderer will not clean the attachments on the city wall bricks before tying these two city wall bricks to the deceased."

"Yes, as long as the attachment of the bricks is still there, we can figure out what kind of soil it is and where it is." "As long as we can figure out what kind of soil it is, we can narrow down the scope of the investigation, and although it is very difficult to find a needle in a small pond, it is much easier than finding a needle in a big sea." ”