At this time, a stunned young male policeman sitting next to the policewoman also raised his hand: "According to what the captain said, if this Lin Xining does not have a little reserve of chemical knowledge, it is impossible to configure this kind of powder that is so corrosive that it can kill people at once." ”

"But the fact that the powder is on those roses suggests that there are two possibilities."

Speaking of this, the young man stopped and looked at Jiang Zhenglun with a look in his eyes full of eagerness.

Jiang Zhenglun nodded at him, encouraged him, and motioned for him to continue.

The young policeman was encouraged by Jiang Zhenglun, and immediately plucked up the courage to speak: "The first possibility: the murderer is this Lin Xining, he may be a genius, he taught himself the ratio of chemical agents and made this powder. ”

"The second is that the murderer has someone else, just through roses as a medium."

The young man paused again, "But it's too much of a coincidence, the flowers received by the two deceased are from the same shop......"

Jiang Zhenglun nodded after hearing this, and immediately took the lead in applauding. He doesn't mind giving some encouragement to some rookie cops.

Jiang Zhenglun: "That's right, Xiao An's guess is also my conjecture, and we can focus on these two lines." ”

"Send some people to keep an eye on the flower shop, and others continue to check the surveillance near the accident to find out the stranger people who have behaved abnormally and have been in contact with roses."

"Yes!"

The police station immediately got busy, and there were two more plainclothes policemen outside Lin Xining's flower shop.

Lin Xining was in the flower shop, and he could feel that someone was staring at him outside.

With a little bit of brain, I knew that it must have something to do with that case, maybe plainclothes or something staring at him.

Lin Xining, who was inexplicably truthful, called Heishi back, closed the door of the flower shop, and took Heishi to buy vegetables.

After all, it's Blackstone who cooks, so you still have to respect it when you buy it.

The two plainclothes men watched Lin Xining go out and immediately followed him.

But when Lin Xining came back with a large bag of black stones, the two plainclothes didn't find anything abnormal, so they could only continue to ambush near the flower shop, staring at Lin Xining's home with luminous binoculars.

There was an unexpected discovery in the police station here, and in the surveillance video, a man in black appeared wrapped all over his body. The man in black had been in contact with roses before the murder and had been seen near the point of the incident.

Jiang Zhenglun saw this discovery, and his years of experience as a criminal police officer told him that this person was definitely related to the case, and there was even a ninety percent chance that he might be the murderer!!

"Check! Do your best to find out this person! ”

After receiving the order, the police station immediately set up operations and made every effort to investigate the person.

However, no matter how they investigated, they couldn't find the whereabouts of the man in black.

The man in black seemed to appear out of thin air and then disappear out of thin air.

Moreover, after the relationship between the two victims was investigated, it was found that the two had no contact at all, and they had never even met in person.

Apparently, it was a random serial killing.

But the only thing that can be worked on is that the murderer seems to be deliberately planting a blame on Lin Xining, especially after the third victim appears.

The third victim was killed in the same way in his home, with a bouquet of roses containing that powder at his feet.

According to the monitoring and investigation, after the victim's husband bought flowers from Lin Xining, there was a little collision with the man in black on the road, which was only the most direct contact.

The man in black has every chance to drugged the flower.

There have been three incidents, and the police can already lock down the man in black as the murderer of the case, but they have never been able to find him.

He always appears in the vicinity of the victim and disappears into thin air after the incident.

The police could only target Lin Xining's small flower shop, whenever someone went over to buy roses. The police immediately retrieved the information of the flower buyer and sent plainclothes police to follow the flower buyer.

The case seems to have been quiet for a few days, and there have been no fatalities in the city.

However, everyone knows that this brief lull is only the calm before the storm.

There was a strong sense of unease among all the participants who were informed of the case, and now the brief calm seemed to be the calm before the storm.

Sure enough, a week later.

On Valentine's Day, two of the women who received roses from Lin Xining's flower shop died at home.

The police department also received a provocative video.

It was a ten-second video, in which the black-clothed murderer held his mobile phone and recorded the moment he was drugged. Indeed, at the moment of physical contact with the flower buyer, he quickly sprinkled the powder in a transparent glass bottle on it without paying attention. At the end of the video, the man in black smiles at the camera.

Although there was a black mask to cover it, the slightly curved corners of his eyes and the wrinkled muscles at the corners of his eyes told the psychological consultant that he smiled.

After Jiang Zhenglun watched the video, he was so angry that he almost smashed the cup in his hand.

Fortunately, the counselor told him a pretty good news.

"Only, now tell the florist owner not to sell roses for the time being. Then we will send a large number of police to protect the girl who received the roses from the flower shop on Valentine's Day, and we will definitely catch the murderer. ”

Jiang Zhenglun and a group of policemen looked at the psychological counselor in confusion, and the young and promising psychological counselor said slowly: "This case seems to be a random serial murder case, but in fact, it is also a specific serial murder case in the scope. ”

"The murderer randomly chose Lin Xining's flower shop at the beginning, and the target was on roses, girls, and flower buyers don't like flowers.

Through the first three cases and the same murder methods, it can be seen that the murderer's character seems to be very persistent and overly cautious. Once the goal is set, it will not be replaced.

This complex will not allow him or her to give up on his or her goal easily, even if he or she feels threatened.

He or she will use the same tactics to kill the target who meets these three goals, before the police can catch him or her.

He is very confident in his methods of hiding his whereabouts, otherwise he would not rashly appear directly in the various monitoring ranges. ”

"I think you have some understanding of his methods of concealing his whereabouts, except that he will appear in the surveillance range before the incident, and his whereabouts cannot be found anywhere else."

Jiang Zhenglun listened to the psychological consultant's analysis, became angry, and slapped the table.

"It's so bold, it's just unworthy of being a human being."

"Send someone to the flower shop immediately to inform you that you will not sell roses for the time being."

"Then make every effort to investigate and protect the target population, no matter how much manpower and material resources are spent, dig three feet into the ground to find him for me!"

……

On the same day, it was immediately found out that the person who bought roses on Valentine's Day.

There were fifty-three flower buyers, two died, and eleven were left to find out those who didn't like flowers.

Each girl was guarded by four plainclothes policemen.

Lin Xining, on his side, also stopped selling roses after receiving the notice.

The whole city has laid a net, just waiting for the murderer to throw himself into the net.

……