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

Early the next morning, Song Mingguang came to the telecommunications company.

"Base station?"

"This is no problem. All mobile phones need to send signals through the base station to make calls, send text messages, or log in to the network."

Communication technology is now far more developed than people imagine.

When the mobile phone makes calls, sends text messages or logs into the network through the base station, some records will be left on it.

Some records can even be restored through certain technical means even after the other party deletes them.

Song Mingguang's investigation was very detailed. He wanted to check everyone's call records, text message records, and even online registration records.

Especially the bank where coal mine funds are deposited.

These two coal mines did not have any business transactions, and the funds were all in two branches. One of them was in the first bank where the car was borrowed and the deposit was made, and the last one was in the bank where the crime occurred.

In other words, if there is an insider in the bank, then the staff of the first bank and the third bank are the most likely.

Therefore, Song Mingguang also focused on investigating the personnel conditions of these two banks.

"Captain Song, this man named Zhang Huang made a phone call 38 minutes before the case was closed."

"Check the other person's phone number and see who they're calling."

There are more than twenty people in Song Mingguang's group. It can be said that the entire communications technology elite of the BZ City Public Security Bureau is serving him.

"The time when the last bank coal mine came to deposit cash was 56 minutes from the time of the robbery."

"That is to say, everyone must remember the answers to all the phone calls they made in the hour before being robbed."

"Check the situation of the person on the other end of the phone and register them one by one."

While Wang Song and Song Mingguang were conducting in-depth investigations, Lu Chuan's work was also in progress.

The first is fingerprints.

The fingerprints on the four cash boxes have been extracted.

Lu Chuan spent most of the night doing identification and analysis.

What a pity.

There are 42 sets of fingerprints in total, 28 of which were successfully compared easily.

The remaining 14 groups were severely deformed, so it took Lu Chuan a long time to complete them.

But the results were far from ideal.

The fingerprints on it were either those of the escort or bank staff, and there were no unfamiliar fingerprints.

Lu Chuan carefully observed the four front boxes. There were some traces of friction on them, and the fingerprints were swept away. It must be that the other party was wearing gloves.

Very careful, no holes left.

But Lu Chuan originally didn't have much hope for this.

The three robbers carefully planned this robbery. The fact that they could leave the box at the scene meant that there would be no flaws.

Sure enough, there were no fingerprints.

Fortunately, Lu Chuan still had another important clue.

short hair.

After completing the fingerprint identification analysis last night, Lu Chuan began to process the short-haired man and extract the DNA information on it.

Early in the morning, Lu Chuan arranged for someone to go to Cui's house to extract the DNA information of the Cui family.

The other party had returned from overseas last night.

First of all, we must rule out the possibility that this short hair was not left by the Cui family, so that the dog can point to whether it was left by the suspect.

As for the gene pool…

Lu Chuan didn't have much hope.

The sample size is too small, so the possibility of success is not high.

In other aspects, everyone is also advancing work, mainly on-site investigations and visits. Find witnesses and find the whereabouts of suspects through witnesses.

However, it is obviously difficult to achieve results in this regard in a short period of time.

At the same time, an armed bank robbery occurred in BZ City, which caused widespread publicity in various fields.

This kind of case may not happen nationwide in several years.

Therefore, all levels attach great importance to the detection of this case.

Li Donglin took three to five calls in one morning, including the director in charge of Li Gang and other key leaders.

At the same time, there is also great pressure on BZ City.

In the past year, the number of criminal cases in BZ City has been on the rise. Originally, the economic development of BZ City was average, but now another bank robbery has occurred.

This gives the outside world some different views on the security environment and even the investment environment in BZ City.

Therefore, it is urgent for all parties to quickly investigate cases and punish criminal suspects.

"At six o'clock in the afternoon, we will hold another case analysis meeting and everyone will report on the progress of the work."

Li Donglin sent a meeting notice to the members of the serious crime team.

time is tight.

Solving the case is not a matter of idealism, and it cannot be solved by just saying it, but the time required by all parties is urgent and it is a fact.

Therefore, a lot of manpower and material resources can only be invested.

Time passed quickly, and at six o'clock in the afternoon, the members of the crime team were sitting in the conference room again.

"The impact of this case is very large, and all levels are taking it very seriously."

When Li Donglin led the crime team to detect cases in the past, more pressure came from the case itself.

But this time was different. Li Donglin clearly felt the pressure, coming from all levels.

Not only the leaders of the provincial department attach great importance to it, but also the leaders at higher levels. BZ City is already like an ant in the pot.

The police chief came twice.

"The reason why I tell you this is to make you realize the urgency of investigating this case."

"Come, each group will report on the progress of their work."

"Wang Song, you come first."

"Yes."

Wang Song has already figured out the sellers of the robbers' explosion-proof suits.

"The explosion-proof suits worn by the robbers during the surveillance were quite special and were rarely sold online. We have found a total of 72 buyers online so far."

"So far, we have contacted all 72 sellers and asked them to track the delivery orders in BZ City, including those near BZ City."

"What we know so far is that only two sets have been sold to BZ City."

"One of them was sold five years ago, and the other was sold a month ago."

"We have found out that these two sets of equipment were sold a month ago and have ruled out the possibility of the other party committing a crime. The person who sold the set five years ago is no longer in BZ City and has not yet been contacted."

"But judging from the preliminary investigation results, there is basically no possibility that an explosion-proof suit would appear at the scene. The time span is too large."

"In addition, since there are three robbers wearing three sets of riot gear, I personally think it is more likely that they will purchase it together."

"Offline channels, we are currently investigating, and we have no clues yet."

From Wang Song's perspective, the robbers may have thought that the police would investigate through the use of explosion-proof clothing.

So they didn't want to purchase online.

Of course, there is also a possibility that three people bought the riot suits separately, but mailed them to different places, and then brought the anti-riot suits back to BZ City through some method.

Wang Song’s report ended. (End of chapter)