The sunny day in August in Jiangzhou is particularly scorching, and the temperature outside has reached 40 degrees. This kind of heat that people can't avoid is really a headache. At noon, the road exudes a wave of heat, and there are no pedestrians on the road except for the vehicles coming and going. People are huddled in their homes, turning up the horsepower of the air conditioner to the maximum, and they are all greedy for this cool mouthful.

The high temperature outside seems to absorb all the vitality of the people, leaving only the students full of youthful atmosphere. At this time, the school year is open, and the students are seizing the time to squander their last leisure time.

A few immature-looking teenagers were holding basketballs in their hands, sweating profusely around a person vending machine, obviously just finished exercising.

"What to drink?"

"Coke!"

"Sprite!!"

Several people scrambled to express their opinions, and then the young man who took the lead clapped and said: "Then Coke, Pepsi or Coca-Cola, which one do you want?" ”

"Pepsi, Pepsi is orthodox, everything else is a cult, I only drink Pepsi with Coke!" The boy said something serious, and the others also laughed.

"If you drink something, you can drink it, and there are so many things!"

"Let's go, let's go......" Several people also took the Coke and walked away satisfied, pushing and shoving, talking and laughing.

……

……

Zhang Yang was inquiring about the case records and files of the past few years at the police station at this time, and suddenly received a file from the police station.

"Jin Ming, what is this?" Now Liu Jinming is in charge of the case files, and he is now Zhang Yang's right-hand man. Most of the events were handled by him, and Zhang Yang believed in his abilities.

Now that he came to him in person, explaining that things are not so simple, Zhang Yang frowned: "Jin Ming, tell me about the situation?" ”

Liu Jinming took out several case files, and then indicated the connection of the case with a red pen and said: "This is the recent Coke poisoning murder case, all the victims died because of drinking Coke with sodium cyanide, but it is very strange that the murderer controlled the cyanide content of Coke of different deceased people in different ranges.

Now there have been three people who died of cola cyanide poisoning, and the cyanide content detected in cola before their death was between 0.9~3g, and we have no clue now, and we are screening the CCTV near the victims to see if we can develop clues.

"Hmm...... Well done."

Zhang Yang was not unfamiliar with cyanide, he remembered that cyanide had been involved in previous cases, but its source was extremely difficult to find out.

As a highly toxic chemical raw material, cyanide is not only not restricted in its use, but even its use can be widely seen in life. It can be used not only for metallurgy, but also for electric ferry, which shows that its source is not complicated, and the murderer can obtain it through various channels.

Poisoning murder is the simplest and least technical type of murder, and only requires you to understand the destructive nature of poison before you can use it. Unlike other murders, which require excellent skills, such as the previous dream killing, which requires extreme professionalism so that the crowd can be divided, poisoning is the complete opposite.

"From 0.9~3 different doses are used on different people, which shows that the grasp of the measurement is not accurate, the first three are experiments, and you don't have them in the back! The murderer will not stop there......"

"Jin Ming!!"

"Yes, Team Zhang, you say!"