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

Chapter 846 Start testing

Conducting DNA testing on all personnel involved in the case is not something that can be carried out just by talking about it.

The BZ City Criminal Investigation Detachment needs to make a lot of preparations.

Sorting out all the personnel of the three banks is one aspect.

There is also the sorting out of floating people in self-built housing areas, which is also an important aspect.

Since we are conducting DNA testing for all employees, how to delineate this range requires careful study.

In addition, preparation materials for DNA sample testing must be prepared overnight.

Here at the High-tech Zone Criminal Investigation Detachment, tonight is another sleepless night.

On the morning of the third day after the incident, some DNA testing reagents were ready.

"Team Lu, I will first select a hundred people here to collect DNA information from the staff of the three banks."

"About 1 copies of the relevant reagents will be available in the afternoon. At that time, we will add additional personnel to collect DNA information from all relevant personnel in the self-built housing area."

"It's up to you at the scene. We'll compare information at the rear."

There was naturally no need for Lu Chuan to go to the scene. His main task was to organize the technicians at the rear to identify the collected samples.

If the blood or saliva sample is insufficient, or if the sample is hair, muscle, etc., these DNA tests will take longer, and may usually take 10 hours or even longer.

Moreover, he proposed to conduct DNA information testing yesterday, but did not give any suggestions on the scope. This was not determined by him.

Lu Chuan is very satisfied with the work efficiency of the criminal investigation detachment of the High-tech Zone.

This mainly depends on the sample for DNA testing. The sample determines the length of testing.

Collecting samples will be quick, the key is to organize carefully so as not to let anyone go.

After Li Donglin communicated with the director of the BZ City Public Security Bureau, he reported to the city before starting today's collection work.

This can greatly reduce identification time.

The ones with the biggest workload are actually the technical staff at the rear.

Soon, the first batch of sampling materials was completed, and Lu Chuan and others started busy.

The equipment inside is relatively old, but well maintained.

Normally, the average time for a DNA test is seven to eight hours.

If it is DNA identification of bones or teeth, it will take longer. Generally speaking, it will take at least three days, and it may not necessarily take half a month.

Lu Chuan and the others must use the simplest method of conducting DNA testing this time, using saliva or blood.

The DNA laboratory of the BZ City Criminal Investigation Detachment is on the top floor of the main building.

In fact, the most important point of a DNA laboratory is maintenance.

It may only take three to five minutes to collect a sample of DNA information, but if it is done for identification and analysis, nothing will come out within a few hours.

The fastest sample is blood or saliva, and the identification time is the shortest. Results can usually be obtained in three or four hours.

This DNA laboratory is much shabby compared to the DNA laboratory of the Haizhou City Criminal Investigation Detachment.

All DNA laboratories have extremely high requirements for pollution and cleanliness. Generally, special professional clean air conditioners are installed in DNA laboratories and are turned on 24 hours a day.

All staff entering the silent laboratory must undergo strict disinfection.

This time, Lu Chuan led five people to work inside.

The so-called DNA information identification is different from what ordinary people know in general. It does not mean that the results can be obtained after putting the extracted clippings into an instrument and rotating them a few times.

The processing of a DNA test material inspection requires multiple steps such as purification, decomposition, extraction, etc. before it can be completed.

Moreover, after each DNA test material is processed, the relevant instruments need to be cleaned. This process is actually quite time-consuming. In the past, when Lu Chuan was doing DNA identification and analysis at the Haizhou City Criminal Investigation Detachment, sometimes he would not even drink water in order to save time, so that he could go to the toilet less often.

Because disinfection needs to be repeated every time you go to the toilet, which is very time-consuming.

When Lu Chuan started fighting in the DNA laboratory, comrades on other fronts were also pushing forward hard.

Wang Song's investigation on explosion-proof clothing is continuing to advance.

There are very few offline merchants selling explosion-proof clothing in BZ City, and Wang Song currently knows of only three.

These offline stores all sell military supplies.

It is a store opened by military enthusiasts.

"This kind of explosion-proof clothing is from a miscellaneous brand. It doesn't have much protective effect. It looks good and interesting, but in fact we don't sell it."

When visiting a business, the other person knew immediately what the robber was wearing in the explosion-proof suit.

"Generally, offline merchants don't sell this kind of stuff. Most of us are military stores opened by military enthusiasts."

“Things like this may be sold more online. We have WeChat groups for enthusiasts in several nearby cities. I will send the photos to the group to ask if anyone has seen this thing. "

Military fever is a small circle again.

Not many people know about it, but the loyalty of this circle is very high.

There is a group of people who like to buy this kind of stuff.

Because the circle has few people and few people, the market here in BZ City is so big. There are only three stores in the circle that engage in this kind of military fever business.

They are relatively familiar with the surrounding Tianzhou City and Haizhou City.

The boss sent Wang Song's photo to the group, and someone responded soon.

"Lao Hu, you are not good at this. Why have you regressed to such a miscellaneous brand?"

"This thing is very flashy and useless. Do you want to get a few sets for any situation?"

"Let's go look for it online. We brothers definitely don't have this kind of stuff here."

"If a friend wants it, I'll ask for it."

Lao Hu typed a line and looked at Wang Song: "I'll ask for help first. If there are any clues, I'll call you then."

"Okay, be sure to call me."

"do not worry."

Wang Song left Lao Hu's shop and went to two other shops.

It’s the same harvest.

While Wang Cong was investigating the boutique, Song Mingguang was also carrying out related work, but the progress was not very smooth.

"I just called my wife, told her to make scrambled eggs for the night and then hung up. I didn't say anything else."

"I called my nephew and told him to go to my place for a drink tonight..."

"I called my dad and told him I wouldn't be home for dinner tonight. It only took ten or eight seconds..."

Song Mingguang focused on investigating and interviewing people who had short phone calls in the period before the incident.

But from the current point of view, everyone's reasons seem to be very valid and have nothing to do with robbery.

Although Song Mingguang could find out the length of everyone's calls, it was impossible for him to get the content of everyone's calls.

So how do you tell whether what they say is true or false?
(End of this chapter)