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

Separating funnel, concentrated sulfuric acid, gas collecting bottle, formic acid, asbestos net, alcohol lamp, steel cylinder, gas compressor, rubber conduit...

Criminal Investigation Detachment No. 1 Conference Room.

Qin Yong, Ren Qiang, Lu Chuan, Zhang Hui and other investigators are all here.

On the projector were the 12 online shopping records that Zhang Hui had just found.

"Captain Qin, this is a clue we just found."

Zhang Hui began to report on the investigation status from this morning to the present.

"In the early hours of this morning, when we were investigating the express delivery situation at Wang Chuanzhi's home, we discovered some abnormalities."

Then Zhang Hui introduced in detail how he discovered the clues this morning.

"Wang Chuanzhi himself has no habit of online shopping. His company and his home have never received his express delivery before."

"But in the past month, the Cainiao Post in front of Wang Chuanzhi's home has received more than a dozen packages from him."

"But the person who came to pick up the package was not Wang Chuanzhi himself, but his son Wang Ruihao."

"We also checked the mobile phone number in Wang Ruihao's name. There was a record of express delivery, and it was relatively stable, about one to two items a month."

"So who bought the things Wang Chuanzhi bought online?"

"Everyone, take a look at these items recorded online."

The network content of the 12 records on the projector is clearly displayed.

"I checked and found that these are the materials and items used to produce carbon monoxide in the laboratory."

No need for introduction from Zhang Hui, everyone sitting here has attended high school.

Generally speaking, carbon monoxide is produced by heating carbon and producing carbon monoxide after incomplete combustion.

In fact, this is a common cause of carbon monoxide poisoning in life.

But if you want to produce carbon monoxide in large quantities and study the properties of carbon monoxide gas, carbon monoxide is prepared in the laboratory by heating with concentrated sulfuric acid.

"Judging from the materials purchased online, we have reason to believe that the murderer was carbon monoxide produced from these materials, which ultimately led to the deaths of Wang Chuanzhi and Zhang Cuilian."

“So who actually purchased these?”

"First of all, we excluded Wang Chuanzhi himself. After all, he had no reason to kill himself."

"We also found another detail in Wang Chuanzhi's mobile phone."

"The buyer purchased these materials using Wang Chuanzhi's mobile phone, and deleted the Taobao software repeatedly after completing the purchase."

"We checked and found that the number of deletions was twelve times, and most of the deletion times were around 12 o'clock in the evening."

"Why was the Taobao software on Wang Chuanzhi's mobile phone deleted many times, and all in the middle of the night?"

"I think what is certain is that someone used Wang Chuanzhi's mobile phone to purchase these materials late at night and then deleted the software after purchasing."

"After that, I purchased it multiple times and deleted it multiple times."

"And there were only two people who had access to Wang Chuanzhi's mobile phone late at night."

"One is Wang Chuanzhi's wife Xu Qianqian, and the other is Wang Chuanzhi's son Wang Ruihao."

Zhang Hui turned around and switched the projector.

"This is the surveillance video we retrieved from the Cainiao Station in front of Wang Chuanzhi's community."

"From mid-December last year until the incident, which lasted nearly a month, Wang Ruihao picked up express delivery at the post station a total of thirteen times."

"One of them was bought by his mother Xu Qianqian, and the remaining 12 were all purchased by express delivery in the name of Wang Chuanzhi."

"Since it is impossible for Wang Chuanzhi to commit suicide by buying these things."

"Then the murderer can basically be targeted at Xu Qianqian and Wang Ruihao."

Zhang Hui's analysis should be said to be very detailed.

And the directionality is also very clear.

If Xu Qianqian hadn't asked Wang Ruihao to pick up the express, it can basically be determined that the person who killed Wang Chuanzhi and Zhang Cuilian was Wang Ruihao, Wang Chuanzhi's biological son.

Although the matter sounds a bit bizarre, when you think about it carefully, Wang Ruihao has the convenience to commit the crime.

First, let’s look at the results of Lu Chuan’s initial identification and analysis of the vehicle involved in the crime.

It is certainly possible that Wang Chuanzhi’s son Wang Ruihao could obtain the keys to Wang Chuanzhi’s vehicle.

The car Wang Chuanzhi drove had two keys. He used one and kept one at home.

And as Wang Chuanzhi's son, Wang Ruihao wanted to do some tricks in the trunk of the car without being discovered by Wang Chuanzhi, which was relatively simple. What was certain during the incident was that Xu Qianqian had no time to commit the crime.

"Team Qin, my opinion is to arrest Wang Ruihao immediately for interrogation."

"I agree with Zhang Hui and arrest Wang Ruihao immediately."

Lu Chuan first expressed his opinion.

"agree."

"agree."

"I agree……"

Qin Chuan looked around, and Zhang Hui's analysis was approved by everyone.

"Okay, then follow Zhang Hui's advice and go through the arrest procedures immediately!"

The relevant procedures were quickly obtained.

The entrance of Haizhou No. 3 Middle School.

Zhang Hui and others were sitting in the police car and did not enter the school.

Wang Ruihao hasn't finished class yet, and Zhang Hui and others have not gone inside to make arrests.

Since people can't run away, there is no need to arrest Wang Ruihao in front of all his classmates and teachers.

Moreover, Zhang Hui’s current analysis only points the evidence to Wang Ruihao.

Whether the other party is the murderer or not depends on the subsequent interrogation and other evidence.

If there is another reversal, and Zhang Hui and others arrest Wang Ruihao in front of all his classmates and teachers, the impact will be too bad.

Soon it was 6:30 pm.

Students came out one after another.

"Head, come out!"

Zhang Liang's sharp eyes immediately spotted Wang Ruihao in the crowd.

"Don't worry, wait until the crowd is almost dispersed, and then we can follow."

Haizhou No. 700 Middle School is not far from Wang Ruihao's home, only about meters away.

So Wang Ruihao usually walks home.

Zhang Hui meant to wait until there were fewer people before arresting him.

Reduce the impact as much as possible.

Ten minutes later, the crowd gradually dispersed, and Wang Ruihao walked alone on the road, more than 200 meters to the door of his community.

"Okay, let's do it here."

Two police cars stopped in front of Wang Ruihao with screeching brakes.

"Your name is Wang Ruihao. I am Zhang Hui, a detective from the Haizhou City Criminal Investigation Detachment. I will now summon you in accordance with the law."

Wang Ruihao was startled by the police car that suddenly stopped in front of him.

"You...are the police?"

Zhang Hui took out his ID and showed it to Wang Ruihao.

"We are the police investigating your father's death. Your mother has met me."

Father died?

Wang Ruihao's puzzled expression suddenly relaxed.

"Oh."

Then, without saying anything, he followed Zhang Hui into the police car.

The process of arresting Wang Ruihao was much calmer than Zhang Hui imagined.

He thought Wang Ruihao would resist violently and even resist arrest.

However, Wang Ruihao just asked about his identity and followed him into the police car.

However, when he arrived in the interrogation room, Wang Ruihao said nothing.

Not a word was spoken. (End of chapter)