"Captain Wang" Lin Jiangbei did not become complacent because of Wang Jiangang's praise, but asked Wang Jiangang a question, "Do you know what the income of carpenters and plasterers in Hangzhou is now?" ”

"What is the income level of carpenters and plasterers?"

Wang Jiangang was stunned by Lin Jiangbei's question. He is the captain of the detective team of the provincial capital police department, how can he usually care about the income of people of the carpenter and plasterer?

Frowning and thinking for a while, Wang Jiangang said in an uncertain tone: "I estimate that I have to have about ten yuan a month, right?" ”

"Ten dollars?" Lin Jiangbei shook his head, "Captain Wang, you really underestimate the income of carpenters and plasterers. At present, the daily salary of a carpenter in Hangzhou is about one to five yuan, and the plasterer is even higher, with a daily salary of two to eight yuan. In other words, carpenters and plasterers in Hangzhou earn at least 30 yuan per month, which is an out-and-out high-income class. ”

In the Hangzhou training class of the intelligence department, the instructors teach not only the skills of special agents, but also the situation of all social strata, the dynamics of the activities of the hundred arts industry, the current factional organization, personnel clutch and the evolution trend of the current situation, secret societies and gang organizations in various places, as well as the urban environment, customs and habits in various places, etc., all of which need to be well known to the students of the Hangzhou training class, and sometimes they will assign corresponding internship assignments to the students.

For example, last month, the instructor assigned a detailed survey of people from all walks of life in Hangzhou, and it was through this internship that Lin Jiangbei had a detailed understanding of the situation of people from all walks of life in Hangzhou, including carpenters and plasterers.

It's just that he didn't expect that the information he had mastered had not been used in his career as an agent, but he had used it in this case.

"Is it that high?" Wang Jiangang's eyes widened in surprise. He didn't expect that the income of carpenters and plasterers, who he usually looked down on, was even higher than that of his detectives.

"I'm afraid it's really that high!" Zhou Fengshan nodded on the side and said, "Before the Chinese New Year, one of my nephews got married. I got a carpenter and made him a set of furniture, and I paid the carpenter two dollars a day. ”

"If the income of carpenters and plasterers is so high, how can they be so embarrassed that they can pick up cigarette butts and roll cigarettes to smoke?" Wang Jiangang asked suspiciously.

"The most likely answer is," Lin Jiangbei had already prepared for this question, and said his speculation with a smile, "This carpenter or plasterer is addicted to gambling and loses all his daily income at the gambling table, so he is embarrassed to the point of picking up cigarette butts and smoking." ”

At this time, Xiao Zhang, who was standing on the side, interjected: "Consultant Lin, is it possible that this carpenter or plasterer is an opium ghost?" I used all my income to buy tobacco and smoke, so I was so embarrassed? ”

"Xiao Zhang," Lin Jiangbei hadn't answered yet, and Wang Jiangang opened his mouth first, "When have you ever seen an opium ghost pick up cigarette butts and smoke?" If they really have a smoking addiction, they would rather squat at the door of the tobacco house and smell the smell wafting inside! In addition, most of the people who are addicted to opium are weak, and it is basically impossible to strangle a person as strong as Cao Ada by rope alone, especially when Cao Ada is still violently resisting. ”

Xiao Zhang blushed and lowered his head, not knowing what to say.

"Okay, Xiao Zhang, now you measure the length of this cigarette butt, make a record, and then take a few photos of this cigarette butt to fix the evidence, and then we will take this cigarette butt apart and inspect the tobacco inside."

Lin Jiangbei spoke at the right time and relieved Xiao Zhang.

"Okay, Advisor Lin, I'll do it right away!"

Xiao Zhang glanced at Lin Jiangbei gratefully, and hurriedly took out a ruler to measure the cigarette butt, and after making a record in the notebook, he placed the ruler next to the cigarette butt as a reference, took two photos in a row with the camera, and completed the fixing of the evidence, and then stepped aside.

Lin Jiangbei walked up, gently dismantled the cigarette butt with tweezers, pulled out the tobacco inside, and then carefully sorted them one by one. After a few minutes, the tobacco is divided into sections and spread flat on a white sheet.

Zhou Fengshan and Wang Jiangang went up to carefully identify for a long time, and then had to admit that Lin Jiangbei was right before, these three parts of tobacco were exactly the same as the tobacco of Hademen, the Three Fort and the old knife brand.

I'm really unconvinced! Lin Jiangbei, this kid not only has a smart brain, but also has a careful reasoning, and even his nose is so good!

"Principal Zhou, Captain Wang, now the image of the owner of this cigarette butt is basically out, a carpenter or plasterer, addicted to gambling, financially embarrassed, and often picks up cigarette butts to smoke." Lin Jiangbei saw that Zhou Fengshan and Wang Jiangang had no objections, so he gave his final conclusion, "Considering that he is very likely to be the murderer, then we must add the characteristics of an arm or arm injury, AB blood type, and left-handedness." ”

"Of course, whether he is a murderer or not can be easily determined." Lin Jiangbei continued, "Wait a minute, let's go back to the bureau and let the equipment of the forensic medical forensic office check the blood type of the saliva on this layer of straw paper on the outside of the cigarette butt, if it is also AB type, then the owner of the cigarette butt should be the murderer!" ”

"What? Can I check my blood type with saliva? Wang Jiangang asked in surprise.

Lin Jiangbei only remembered that the technique of saliva blood group examination was only proposed by Professor Weiner in 1946, and there was no such thing at this time. However, the technique of checking blood group from saliva is not complicated and can be achieved with existing forensic tests. The big deal was that he went to the forensic office to do the test himself.

So he nodded and replied, "Yes, the latest technology is now able to check blood type with saliva." ”

Wang Jiangang didn't understand this, and when he saw Lin Jiangbei answering so firmly, he put his mind at ease and beckoned Cao Shangen, who was standing aside, to come over.

"Cao Shangen, think about it carefully, does your father know or are more familiar with plasterers or carpenters?" His plan was to investigate the plasterer and carpenter from Cao Ada's social connections.

"Carpenters and plasterers?" Cao Shangen thought for a moment and said, "My father knows a few, and one of them is more familiar with my father. ”

"What's your father's name? How old is it? Is it left-handed? Love gambling? Are there any injuries on your arms? Wang Jiangang asked a series of questions.

"His name is Yang Laosi, seventy-eight years old, I don't know if he is left-handed, he liked to gamble when he was young, but he was paralyzed last year and has been lying in bed to be raised by his grandson!" Cao Shangen replied.

"And what about the other carpenters and plasterers? Are there any left-handers among them, and are there any injuries on their hands? Wang Jiangang asked again.

"One of them was left-handed, but there were no injuries on the back of his hand or arm." Cao Shangen replied, "And these people have already been investigated by the sub-bureau a few days ago, and they said that there is no problem. ”

"You write their names and addresses." Wang Jiangang said, "Regardless of whether there is a problem or not, all these people must be arrested and re-investigated!" ”