Chapter 463 Poisoning Case

The Criminal Police Brigade had first learned about the poisoning case at South China University, so Gu Guangsheng answered the question on his behalf.

"The human body's ingestion of N-dimethylnitrosamine can cause damage to multiple organs such as the liver and kidneys. Through methods such as inducing vomiting, gastric lavage, fluid rehydration, and drug treatment, timely treatment can improve the cure rate and reduce sequelae."

"But if the dosage is too large, it may cause death."

"N2 itself has a strong smell. It is a yellow liquid with a weak odor. It is volatile and easy to distinguish. Long-term exposure to small doses may also increase the risk of cancer in the human body. It is a dangerous item in the laboratory and is prohibited from being carried away. Normally The experimental project and applicant’s name must also be registered for use.”

After briefly explaining the toxicity, Gu Guangsheng paused and said: "From the time of the poisoning case to now, three people have died, and one person is still in the intensive care unit."

"Among the four, the two deceased, Guo Rui and Yang Yifan, were recent undergraduate graduates majoring in political and legal investigation in South China, and had already obtained the qualifications for postgraduate study in our school."

"The other deceased, Jian Tao, was a third-year law student. He applied for an extension at the beginning of the year and wanted to return to his hometown to take care of his pregnant wife."

"The survivors Zhang Junde and Jian Tao live in the same dormitory, and they are also third-year graduate students. They are still awake from the poisoning, so there is no way to give a confession for the time being."

"After collecting surveillance, we found that the incident happened four days ago. Four people went back to the dormitory one after another to pack their things. An hour later, they simultaneously developed symptoms of nausea, repeated vomiting, and a high fever. It was initially diagnosed as gastroenteritis, but soon It was overturned by a city hospital and suspected of chemical poisoning. "

"The chemical elements were checked one by one and it was two days later when it was confirmed that it was N2. Guo Rui and Yang Yifan had the largest intake and died. Another day passed, and Jian Tao could not survive the complications caused by organ failure."

"Zhang Junde had the least intake. Thanks to the doctors' efforts to rescue him, his vital signs were temporarily stable."

"But we are not out of danger yet."

The atmosphere in the office was heavy, and everyone listened to Gu Guangsheng's summary without saying a word.

According to the current investigation clues, it can only be determined that the four people were photographed entering and exiting the school together by school surveillance that day. Some classmates and colleagues from nearby restaurants proved that they were gathering at a hot pot restaurant.

It should be a celebration of graduation.

"The four of them met because they participated in the same competition in college, and they all have a good relationship, and they often keep in touch with each other in private."

Gu Guangsheng called out the personal files to Jiang Yang and Yu Jing, "The four dormitories are at both ends. Jian Tao and Zhang Junde, who were in the graduate dormitory building, called the police and called the emergency number when they noticed something was wrong. Judging from the traces on the scene, the situation was slightly better. Zhang Junde called Guo Rui and Yang Yifan."

"The initial guess is that I want to remind the two of them."

"Unfortunately, Guo Rui and Yang Yifan consumed a large amount and were the first to suffer from the poison."

After hearing the general facts of the case, Jiang Yang focused on the suspects who had more contact with dead people.

"Do they have classmates or teachers in common? The kind that are relatively close. The purpose of the murderer is not clear yet... What about the papers these four people published and the competitions they participated in in recent years?"

The first thing to do is to find common ground.

In the file, the forensic identification report pointed out that no traces of N2 were detected in the dormitories of the four people or in the items they carried with them.

In other words, the person who poisoned the poison was most likely in a public area and used some smell to cover it up.

For a yellow liquid with a weak odor like N2, it is easy for ordinary people to detect something wrong.

Especially since the four of them are engaged in law and investigation, they will be more sensitive.

"We're checking. There are more than twenty suspects listed. They all have academic competition, common interests, or close contacts with the four people, and have had conflicts in the past."

"Due to the clear discomfort caused by N2 poisoning, nine people with clear alibi have been excluded."

The investigation by the criminal police brigade was very efficient, and the basic information was sorted out.

The final list of suspects was reduced to seven, and people were placed under close surveillance.

While others were flipping through the suspect files, Jiang Yang's eyes fell firmly on one of the names.

"Pan Zhaoqing."

He suddenly spoke, interrupting several people's thoughts.

"You doubt him?"

Yu Jing looked at Jiang Yang. He knew that the other party had recently learned about Pan Zhaoqing, so he was not surprised by Jiang Yang's reaction.

Others asked curiously: "What's wrong with this man? He just returned to Fukuoka from Kyoto in early July. It is said that he was invited by his alma mater to give a lecture."

"Pan Zhaoqing is quite famous in the law school. When we went to inspect the school, we saw his introduction on the wall of fame on the ground floor of the school."

As the director of the municipal bureau, Liu Zhonglin is very concerned about the poisoning case.

Those who died were all top students and pillars of the country.

Not only is the pressure from the school huge, there is also a lot of public opinion.

The leader has ordered the truth to be found out as soon as possible, an explanation given to all parties, and the murderer to pay a price.

Liu Zhonglin withstood the pressure and hurriedly transferred the case to the Criminal Investigation Corps and asked for joint handling of the case.

With the manpower and material resources of Jiang Yang and the corps, the efficiency of solving the case will definitely be greatly improved!

"I have two cases related to Pan Zhaoqing."

After thinking about it, Jiang Yang explained the case of Pan Kuang and Liu Wude in detail.

Although the two cases involve civil matters and the amounts are not large, the content behind the cases is thought-provoking.

"You mean, Pan Zhaoqing has an antisocial personality?"

Deng Yong lowered his eyes and thought deeply. He had been exposed to similar cases in his early years, and there were indeed some similarities.

"Not necessarily, but I guess he is not very positive mentally and is suspected of retaliating against society."

Jiang Yang didn't say anything.

"Pan Zhaoqing is suspected of abetting crimes. I apply to be responsible for the follow-up of this person."

"Okay, I'll leave it to you."

Several people quickly divided the work, and before they had time to eat, they led their own teams and set off.

Jiang Yang had called the principal of South China Political Science and Law in advance and knew that Pan Zhaoqing was at the school.

Coincidentally, the people responsible for monitoring him were Meng Hua and Deng Yaojun.

After not seeing each other for a long time, Jiang Yang and the two of them had no time to chat, so they talked about the case directly.

"Brother Yang, we have been guarding Pan Zhaoqing's dormitory downstairs for two days, and we haven't seen any strange behavior on his part. We go to and from get off work normally every day, attend classes during the day, and occasionally stay in class to give lectures."

"I would also be surrounded by students asking for advice during lunch. In the afternoon, when I had no classes, I would go to the library, and sometimes I would go to a law firm to provide consultation services on social cases."

Deng Yaojun took out the law enforcement recorder, which showed Pan Zhaoqing's actions at various times.

"Where is this?"

Jiang Yang pointed to a husband's house and said, the building in the picture does not look like one near the school.

"Oh, it's Pan Zhaoqing's father's house."

Meng Hua took a look and explained: "Yesterday morning, he bought some fruit and went back to his father's place. He himself has a small two-bedroom apartment in Kyoto, but he has never bought a house in Fu City."

Jiang Yang raised his eyebrows, Pan Gu?

"Look for Pan Zhaoqing first."