The criminal police brigade was fully operational, and soon the surveillance video and other things were sent to the office.

Xiao Ning opened his laptop and looked back and forth.

The screen is located on the street behind the school, but it is not directly facing the part of the power grid of the No. 1 High School, and only about half of the location can be seen.

The tone of the video is very dark, only the place where the street lamp is located is slightly brighter.

As the time of surveillance came to three o'clock in the morning, a van appeared in the frame.

Xiao Ning's body leaned forward slightly, his eyes fixed on the screen.

The car door opened, and out came a man, who should be nearly 1.9 meters tall, even if he was wearing a black casual suit, he could see his physique. The cap was worn very low, and there was a mask on the face, and the only pair of eyes that were exposed were because they were always keeping their heads down, so they couldn't see a little, only the small piece of skin exposed on the side.

He leaned through the car door and pulled out a black plastic bag.

The bag is very large, and it doesn't seem to be lightweight, judging from the vague outline, it should be a person inside.

Seeing that the man's arm strength was excellent, he easily put the bag on his shoulder, took a few steps forward, and then disappeared into the surveillance screen.

From beginning to end, the man knew exactly where the surveillance was and never exposed at all.

Xiao Ning frowned slightly, leaned back in his chair, and waited quietly.

Half an hour later, the man reappeared, leaving only a black bag in his hand, and the contents were nowhere to be seen.

Yin Zetai watched from the side and said: "This person should be the murderer, he throws his body into the deserted pool of the high school in the middle of the night every time when no one is around." ”

No, something is wrong.

Xiao Ning was silent for a long time before he said: "Take it to the technical department for analysis and see if you can narrow down the scope of the murderer through his height and characteristics." Also, tell if there's something wrong with his legs. ”

Yin Zetai was puzzled, "His legs? ”

In the surveillance video just now, I didn't find anything strange about the man's walking.

However, since Xiao Ning said so: he naturally didn't dare to waste time, and immediately took the USB disk with the video to the technical appraisal department.

Xiao Ning sat in the office for a while, and then stood up as well.

In the Technical Appraisal Department, seven or eight police officers were busy at this time.

As soon as Xiao Ning came in, Yin Zetai beckoned to him inside, "Boss, this way." ”

As he walked over, the figure of the man was zoomed in as much as possible on the computer screen, and at the same time, the clarity was deepened little by little using the software.

Slowly, the man's silhouette became clearer.

The technical appraiser pointed to his leg, "There is a problem with the folds of the clothes here, usually when we wear clothes, it will naturally sag, and there is a protruding piece here, obviously wearing boots, or something tied to it." ”

Xiao Ning said: "Look at his walking posture. ”

"Okay." The computer screen moved frame by frame, and after zooming in and looking at it carefully, it was really a bit of a problem.

Xiao Ning stood up straight, "This person should have something very high under his feet, and he will lean forward when he walks, and at the same time, his center of gravity is a little unstable. ”

The technical appraiser agreed with him, "That's right. ”

Then he zoomed in on the picture little by little, "If you crop it here and compare the forward tilt of the pants and the center of gravity, there should be at least a height of about ten centimeters underneath." ”

Subtracting ten centimeters from the height of one meter nine, it is only one meter eight.

It seems that this person is deliberately disguising his height in order to confuse the direction of the police investigation. He knew that one day he would be found, and everything was arranged from the beginning.

This is a very experienced murderer.

Xiao Ning looked back at Yin Zetai, "How many times did you find him transporting corpses in the surveillance?" ”

"Only this time, we didn't find anything else. This surveillance hard drive can only be stored for a month, and we have all screened it this month, and only this night has he appeared. ”

No way.

Xiao Ning thought back to those corpses, among which there were five that had been dead for no more than a month, how could it be possible to transport the corpses only once.

If this man is really the murderer, then the way he dumped the body was not just to transport it from the fence of a high school, there should be other ways.

If he is not the murderer, then this case is likely to be not only a murderer, but a gang.

Xiao Ning pulled over a chair and sat down, pressed his hands on his temples, and began to force himself to keep thinking.

What exactly is missing, why the thoughts in the head are intermittent, and these clues cannot be connected.

Outside the corridor, Xu Xingteng probed his brain and looked into the glass window, and finally saw Xiao Ning's figure, he immediately walked in and said in a low voice: "Boss, I went to investigate the matter of the drug, this medicine has been bought by a total of thirty-two people in the hospital's records in the past year, of which twelve have bought a relatively large amount, and the other twenty people are only a few days' amount." By the way, I have also investigated the theft of the pharmacy, and it has not happened in the past year. ”

"One more thing." Xu Xingteng put the document in front of him, "There is only one doctor who has prescribed this medicine, and I have also called up his information." ”

Xiao Ning immediately took it and looked down.

Yin Zetai asked, "How can only one doctor prescribe this medicine?" ”

Xu Xingteng replied: "This seems to be related to the disease, this doctor is the attending physician, and all the diseases involving this drug should be seen by him." In short, I don't particularly know about it either. ”

Xiao Ning stood up, "Follow me." ”

No matter where it could be a breakthrough, he would not let it go. Xiao Ning had always only believed in his own eyes and what he felt.

Municipal Hospital.

Xiao Ning went straight to the third floor.

The door to the exam room was open, and there were two people lining up inside.

Xiao Ning didn't speak, but sat next to him and waited.

About twenty minutes later, two patients left with their cases in quick succession. Xiao Ning then sat down on the chair next to the desk, "Doctor Zhang." ”

Zhang Hai looked at him, "I am, you're a policeman, right?" ”

As early as the time they came in, the atmosphere in the consultation room was different. At his age, he still has this bit of eyesight.

Xiao Ning took out a piece of paper, on which was the name of the drug, "This year, you have prescribed this medicine to thirty-two, and twelve of them are very large. ”

Zhang Hai stared down at the note for a few seconds, "It's true that I am the only one who prescribes this medicine in the entire hospital, but I have never prescribed a large amount." This medicine is very damaging to the kidneys, and I always let them take it for a few days and then stop taking it. ”