Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

After the second on-site investigation, Lu Chuan collected all the relevant physical evidence and sent it to the Criminal Investigation Detachment.

Criminal Investigation Brigade, On-site Investigation Office.

"Director Lu is so honored to be here. I'm so sorry for not welcoming you in person!"

Yang Sen and Yang Lin greeted Lu Chuan with a smile.

Lu Chuan hasn't been to the Criminal Investigation Detachment for some time.

Lu Chuan had a lot of cases some time ago, and he was also on a business trip to Tianzhou City. Even if there were no cases, the affairs of the branch were quite complicated and there were many meetings, so Lu Chuan hasn't been to the on-site survey office for more than three months.

"Don't give me that. I have something to do this time. I need to use our laboratory later..."

Although he hasn't been here for a while, Lu Chuan still feels that this is the most comfortable place.

I met a lot of acquaintances on the way in. Although Lu Chuan has not been in the Criminal Investigation Detachment for a very long time, he feels that he has the most acquaintances here.

After all, this is where Lu Chuan started his career, and it is also where Lu Chuan gradually moved from a technical position to a leadership position.

Whether it was Qin Yong, Zhang Hui, or Liu Guodong, they all provided great help to Qin Chuan.

However, it was not a particularly good time to come back this time. Liu Guodong was on vacation and was not here these two days. Qin Yong went to the Municipal Bureau for a meeting, and Zhang Hui was out on a case.

The survey office is still quite well staffed, but Mr. Bai will retire in less than a month. He can choose to take a vacation in two days and then go through the retirement procedures.

As a result, the on-site survey office is once again short of staff.

Originally, there were supposed to be four people in the survey office, and when Lu Chuan first arrived, the office was just full.

However, after Liu Guodong was promoted and left the survey office, it has been in a vacant staff position ever since.

In addition, Lu Chuan was assigned to the Criminal Police Brigade of the High-tech Zone Branch, so there were even fewer people here. Liu Guodong had no choice but to take charge of the affairs of the current office.

Fortunately, Yang Lin came over to fill the vacancies here.

But time flies so fast. When Lu Chuan first joined the company, Lao Bai was 55 years old. Now he is 59 and will be 60 soon. He will retire in more than a month.

"If you don't come again, you won't be able to see me..."

Lao Bai was obviously very happy to see Lu Chuan coming and teased him.

"I told you to say this. You've just retired, not gone. I won't see you anymore. Come on, Lu Chuan, sit over here."

Janssen interrupted.

Yang Lin poured tea for Lu Chuan: "Come on, Director Lu, please have some tea!"

Lu Chuan had seen Yang Lin and his classmates quite often. He had seen them quite often in recent times. They even got together for a drink when their child was 100 days old some time ago.

Although Yang Lin has been in the Criminal Investigation Brigade for just over a year, he has actually become a technical backbone of the on-site investigation office.

Yang Lin himself is a graduate of a professional school, so he can ask Lu Chuan if he doesn't understand something. He also has experience in grassroots police stations, so he is growing up very quickly.

In the past year or so, Yang Lin's field survey technology has made great progress. Although he is still not as good as Yang Sen and Lao Bai, he is much better than the limited-access criminal police in other branches. Especially in the mastery of some new cutting-edge technologies, Yang Lin is actually more familiar with them than Yang Sen and Lao Bai, but he is slightly less experienced.

Now Yang Lin has become a key training target of the Criminal Investigation Detachment.

When Lu Chuan came to the Criminal Investigation Brigade, Liu Guodong was only 46 years old. Now he is over 50 years old and will basically not move forward from his current position as deputy brigade commander.

Now let’s look at the office director, Yang Sen. Yang Sen was 40 years old then and is now 45 years old, which can be said to be the prime of his life, but he will only work for another five or six years.

At that time, it will be natural for the position of office director to go to Yang Lin first.

Yang Lin is only 29 years old now, and in a few years he will be a little over 30 years old.

There is also the possibility of further progress in the future.

"Don't make fun of me, kid. Did you run away halfway through the last meal and drink?"

Lu Chuan took the tea. Compared with Yang Sen and Lao Bai, Yang Lin and Lu Chuan actually spoke more casually. Not only were they classmates, but they were also the same age.

"Can you blame me for that? We had a meeting the next day, and we were supposed to drink less, but these guys ended up fighting for their lives. It's all my fault. If I hadn't run away, I would have had to drink under the table."

After a few people chatted for a while, they got back to the case.

"It can basically be determined to be a homicide. The traces found at the scene prove that the murderer most likely dismembered the body in the bathroom at the crime scene after killing the person, and then transported the body out in a suitcase."

Lu Chuan came this time to test the blood condition to see if he could confirm that the other person was Wang Lili.

Because Wang Hong is Wang Lili's aunt, Lu Chuan collected her blood for comparison. As long as there is a blood relationship, it will be fine.

Another thing is the kitchen knife.

The kitchen knife may not be the murder weapon, but it should be the tool used by the other party to dismember the body, so this should not be a big problem.

However, the murderer had cleaned the kitchen knife carefully, so it is not certain whether there are any valuable clues on it.

In addition, there is the kitchen sink, the drain bend and the bathroom sink drain. Lu Chuan also brought some debris in the bend, which needs to be analyzed for trace evidence.

"It's okay, just leave it to me. The results should be out in two days. I have to work overtime, so it should be almost out tomorrow. But as you know, trace evidence will take a while to come out. The earliest it can come out is two days later."

Yang Lin and others would certainly not refuse, and it was impossible for them to let Lu Chuan work overtime to do these things.

Now Yang Lin is familiar with all the on-site investigation experimental equipment in the Criminal Investigation Detachment, especially the trace substance analysis.

Now all the evidence for this need is produced by Yang Lin.

He is dead. Ever since the Criminal Investigation Brigade upgraded its modern equipment, the crime-solving rate of the entire Haizhou Municipal Public Security Bureau has actually increased.

In the past, whether it was the Criminal Investigation Brigade, the Technical Identification Center, or the Center, most of the technical judgments made on on-site investigations were limited to fingerprints or DNA.

But now it’s different. With the trace evidence, Yang Lin can do more experiments for analysis, and he can provide more technical support and help.

For example, the discovery of some details such as fibers and hair can be used to infer the circumstances of some cases through the identification of trace evidence technology. (End of this chapter)