In the corridor outside the door of the forensic office at the provincial capital police station, Wang Jiangang anxiously paced back and forth.

Hearing a knock on the door, Lin Jiangbei walked out with a piece of paper in his gloves.

Wang Jiangang rushed forward with an arrow step and asked anxiously: "Consultant Lin, how is it, has the blood type been found out?" ”

"I found out, it is indeed AB type." Lin Jiangbei handed the test results in his hand to Wang Jiangang.

Wang Jiangang lowered his head and swept the paper with his eyes, and he couldn't understand the words in the first few lines mixed with professional terms and symbols, but he saw the last sentence on the paper: The blood type substance detected in the saliva stains of the sample is type AB. Inspector Lin Jiangbei.

"Great! With this result, we can basically determine that the owner of the cigarette butt is the murderer of Cao Ada. Wang Jiangang said.

"It can only be said that there is a considerable possibility. Whether it is or not, you still need to find the owner of this cigarette butt to be sure. Lin Jiangbei regretfully spread his hands, but unfortunately there is no DNA testing technology and equipment in this era, and it is still not 100% certain based on blood type alone.

"Let's go, let's go to the conference room right away, the bureau is still waiting for us!" Wang Jiangang pulled Lin Jiangbei and walked to the conference room.

"Captain Wang, how are you doing over there?" As Lin Jiangbei walked, he asked Wang Jiangang, "Did you find any suspicious clues from the few carpenters and plasterers who were arrested?" ”

"No," Wang Jiangang shook his head regretfully, "Judging from the investigation, the suspicion of these people can basically be ruled out." ”

Lin Jiangbei nodded, not surprised by this result.

If it was really these carpenters and plasterers who were familiar with Cao Ah Da to commit the crime, it is estimated that the first large-scale investigation operation in the provincial capital police station would be exposed.

Walking into the conference room, Wang Jiangang handed the test results in his hand to Zhou Fengshan with both hands, "Bureau, the test results are out." The blood type of the owner of the cigarette butt is indeed AB type. ”

Zhou Fengshan looked down at the test results on the paper, and said to Lin Jiangbei: "Jiangbei is hard! What are your thoughts on what to do next? ”

Lin Jiangbei pulled out a chair and sat next to Zhou Fengshan, and said with a smile: "Principal Zhou, let's listen to the opinions of Captain Wang and your seniors." It's okay for me to do theoretical analysis, but how to arrange the action, this is still more professional for Captain Wang and all the investigators here! ”

Zhou Fengshan nodded, glanced around the conference room with his gaze, and then spoke: "Regarding Consultant Lin's analysis of the case, I have already introduced it to you in detail just now. Now Consultant Lin has taken out the test results of the cigarette butts, confirming that the owner of the cigarette butts is likely to be the murderer. So now let's talk about it, what should we do next in this case? ”

As soon as he finished speaking, a thirty-five or sixteen-year-old police officer sitting in the third position on the right raised his hand, "Bureau, I want to talk about something." ”

At this time, Wang Jiangang, who was sitting next to Lin Jiangbei, put his mouth to Lin Jiangbei's ear and introduced him in a low voice: "This person is Rao Xiaodong, director of the Second Branch Bureau, who has cracked many cases in the jurisdiction of the Second Branch Bureau, and has been commended by the Police Department of the Ministry of the Interior. ”

"Director Rao, please speak!" Zhou Fengshan nodded.

"I propose that a major search be launched immediately in Tangzi Lane, our jurisdiction." Rao Xiaodong said.

"Why?"

"We have a lot of professional teahouses in Hangzhou, which are divided by industry, among which the Tangzixiang teahouse in our jurisdiction is a professional teahouse specially for carpenters and plasterers, and there are many carpenters and plasterers gathered there, in addition to drinking tea and bathing in the teahouse, they are also waiting for customers to come to solicit work. This is one of them. ”

Rao Xiaodong said, "Second, in addition to the professional teahouse of carpenters and plasterers, there are several wood furniture stores in Tangzi Lane, and they also employ many carpenters and carpenters. ”

Third, Tangzi Lane is less than three kilometers away from the Cao Family Ancestral Hall in Hengtaohua Lane. If the murderer really often drinks tea in the teahouse in Tangzi Lane, then he has the conditions to get to know Cao Ada. ”

"Fourth, on the opposite side of Tangzi Lane, is Shangzhu Lane. Shangzhu Lane is not only our Hangzhou, but also the largest gold, silver and jewelry trading place in Zhejiang Province. Not only Xinyuan, Yiyuan, and Qianyuan, the three largest silver buildings in Hangzhou, were built here, but also dozens of large and small gold and silver shops. This also provided the most convenient conditions for the murderer to sell gold leaf and sterling silver incense burner stolen goods. ”

"Therefore, I suggest that a major search of the teahouse and wood furniture store in Tangzi Lane be carried out immediately, and even if the murderer is not hiding there, clues to the murderer can be found."

Zhou Fengshan, Du Chenghu and Wang Jiangang heard this, their eyes lit up, and they nodded again and again.

Even Lin Jiangbei had to admit that Rao Xiaodong's analysis was indeed very reasonable, and it was necessary to immediately launch a large-scale search of Tangzi Lane.

"Jiangbei, Jiangang, what do you two think of Director Rao's proposal?" Zhou Fengshan turned his head to look at Lin Jiangbei and Wang Jiangang.

"Director Rao's suggestion is very good, I completely agree." Lin Jiangbei nodded and said.

"I also agree with Director Rao's suggestion." Wang Jiangang said, "However, I have two more points to add to Director Rao's suggestion. ”

"Well, you say!" Zhou Fengshan made a gesture to Wang Jiangang.

"First, that is, in addition to Tangzi Lane, there are also several carpenter's plastering teahouses in Chengtou Lane near the Chengzhan Railway Station. It is also a gathering place for carpenters and plasterers in Hangzhou. It is possible that after committing the crime, the murderer was transferred from Tangzi Lane to Chengtou Lane, so it is necessary for us to search Chengtou Lane at the same time. ”

"Second, most of our carpenters and plasterers in Hangzhou are from Dongyang, Jinhua, and are known as the Dongyang Gang. Therefore, in addition to the two locations of Tangzi Lane and Chengtou Lane, the carpenters and plasterers in Hangzhou often gather at the Jinhua Hall in Houchaomen. Therefore, we must include the Jinhua Hall in the scope of this search. ”

"See Gang, you added these two points very well!" Zhou Fengshan nodded at Wang Jiangang with satisfaction, "Jinhua Hall and Chengtou Lane are the targets to be included in the search. ”

After praising Wang Jiangang, Zhou Fengshan glanced at the conference room with his eyes again, "What about the others, do the others have anything to add?" ”

Seeing that no one responded, Zhou Fengshan turned his head to look at Lin Jiangbei again, "Jiangbei, what about you, do you have anything else to say?" ”

Lin Jiangbei shook his head and said, "No, Captain Wang and Director Rao have already considered it comprehensively. ”

"Alright then!" Zhou Fengshan nodded, slapped the table with his hand, and said: "Then I will arrange the division of labor, we will devote all our efforts to Tangzi Lane, Chengtou Lane and Jinhua Hall this time, everyone must not be sloppy, we must cheer up, keep our eyes wide, and be sure to arrest the murderer of the theft and murder of the Cao family ancestral hall!" ”