Chapter 22 Chapter 21

After reaching the sixth floor, Gao Dong still worked tirelessly to climb out of the window himself. At this moment, he saw a strange piece of iron nailed to the wall at the bottom of the window. The iron piece is about ten centimeters long, and the nail is right in the middle. There is a protrusion on the iron piece, which looks like an old-fashioned window bolt, with a finger-thick hole in the middle. Gao Dong looked at this thing for a long time, and called Chen Forensic Doctor: "Old Chen, what is this for, do you know?" Chen Fayi squatted down and studied for a long time, and finally shook his head: "I don't know, I haven't seen this thing before, it seems that the iron sheet was artificially processed into this shape."

Gao Dong frowned and nodded: "It's a bit strange that this thing appeared out of nowhere. You can take a few photos later." He asked someone to measure the width of the rainshield on the sixth floor, and it turned out that it was the rainshield on the sixth floor It is wider than those on the lower floors. That is to say, if the stone slabs were originally erected on the sixth floor, after being blown down by the wind, the stone slabs would not hit the rainshield below. Now Gao Dong has ruled out the possibility that the stone slab fell from the fifth floor, no, to be precise, he ruled out the possibility that the stone slab fell from the edge of the fifth floor.Of course, it is also possible if the suspect threw the slate down from the fifth floor.

But on the sixth floor, there was a man-made, strangely shaped iron piece nailed in the middle of the root of the wall, and because the rainshield on the sixth floor was wider than that on the downstairs. Gao Dong couldn't help thinking, could the stone slab have fallen from the sixth floor?And what does this piece of iron have to do with the slate? If it really fell from the sixth floor, the murderer applied glass glue on the fifth floor, obviously intending to mislead the police's investigation.What is he misleading?What is he hiding? Gao Dong knows very well that in a murder case, there is always a motive and purpose in the murderer's redundant actions.

Now that the possibility of the stone slabs standing on the edge of the fifth floor and falling naturally has been ruled out, the glass glue on the fifth floor is obviously a cover-up. The so-called cover-up means that the murderer hopes that the police will focus on the fifth floor instead of investigating other places. Why did the murderer want the police to investigate the fifth floor?It must be because the investigation on the fifth floor yielded no results. The real clues lie elsewhere! The murderer had no direct contact with Hu Haiping from the beginning to the end of the case, and clues such as the murderer's footprints, fingerprints, and DNA could not be found, so what clues would the murderer worry about being noticed by the police?

After listing several basic elements of crime, there is only one answer: that is the tool of crime! The murderer must have left some kind of criminal tool at the scene!And this thing cannot be taken away from the scene by the murderer in a short time! That's why we need to use glass glue on the fifth floor to interfere with the police's investigative attention! Using the enumeration method to rule out all possibilities, only this one possibility remains. Only when the murderer knows that he can't clean up the crime scene in the first place, does he need to forge another scene in advance!

Inferred from the inevitable logical deduction, since the fifth floor is seen to be suspicious, then this is the only result. But now there are still a few problems.First, if the stone slab didn't fall from the fifth floor, must it have fallen from the sixth floor?Second, how was the slate removed by the murderer?Third, how did the murderer know that the stone slab fell and Hu Haiping would definitely be killed? Regarding the third question, Gao Dong got inspiration from the story of the fifth floor. The glass glue on the fifth floor was not painted after the crime, but before the crime.Explain that this is not an impromptu killing, but a planned murder.At the same time, this also shows that the murderer has considered the entire murder plan thoroughly, indicating that the murderer is a very thoughtful and meticulous person.

Then such a person obviously would not take the risk of murdering in a way of throwing heavy objects from a high altitude to kill the people below by pure luck.The success rate of this murder is very low, and if it fails, the consequences are very serious. It seems that the murderer has a high probability of success in the murder. Gao Dong pursed his lips, imagining the possible scenario of the stone slab falling. For such a murder to be successful, the condition is that when Hu Haiping just walked to the bottom, the stone slab fell on his head at exactly the same time. One possibility is that when Hu Haiping reached the point in front of the rainshield, he was delayed by something and stayed where he was.

Another possibility is that the murderer has calculated Hu Haiping's walking speed and the time it takes for the slate to fall. When Hu Haiping walked to the murderer's predetermined position, the murderer threw down the slate, and then Hu Haiping continued to walk forward. The slate fell again, and just as he reached the flashing, the slab fell right on top of his head. Gao Dong rubbed his temples. The second possibility seemed unthinkable, but after thinking about it carefully, the possibility of this kind of murder did exist. Everyone's walking speed is different at different times and in different environments.But most of the time, you are walking at your own fixed speed.Maybe you never realize it, and you never think about it, but you walk at the same speed most of the time every day.

Especially when you come home from get off work and walk in the door. When Hu Haiping comes home from get off work every day, he drives into the community and parks his car. After getting out of the car, he walks towards the unit building.At this time, he had nothing to worry about, nor was there anything urgent to deal with, and he was walking on flat ground. During this period, there was almost no difference in his walking speed every day. Walking on flat ground is different than climbing stairs.When climbing the stairs, sometimes I have a whim and run a few steps.But when walking on flat ground, the same person, the same day, the same day off work, and the same walk to the unit building, the speed at this time is also the same.

Gao Dong recalled the situation when he came home from get off work. He would drive the car into the underground parking garage, get off the car and walk towards the elevator. Looking back carefully, it seems that his walking rhythm is the same every time. When the walking speed to the unit building is the same every day, then the murderer can completely set up this trick to cause heavy objects to fall from the building, unfortunately killing people. Of course, this is only a possibility, and Gao Dong cannot rule out the first possibility for the time being. Assuming the second possibility is true, then he can judge that the murderer is probably a science and engineering major, because it requires calculation time.

Gao Dong is a top student in science. Although it has been almost twenty years since he graduated from high school, he still remembers these basic physics knowledge of calculation speed very clearly. The second way to kill people, the murderer needs to calculate the time for the stone slab to fall from the sky, which involves the acceleration of gravity, but this is very simple, any middle school student, even a liberal arts student knows how to calculate it.Then you need to know Hu Haiping's walking speed, which is also very simple. You can know it by pinching the stopwatch after waiting a few times near the unit building. Although such a murder requires little information, Gao Dong still finds it inconceivable that someone would commit murder in this way. After all, he has never seen or even heard of it. Now is the stage of case detection. When encountering unimaginable cases, unimaginable assumptions are needed, and all the starting points of this assumption are logical deduction after seeing through the trick of glass glue on the fifth floor, which has certain rationality and possibility. Afterwards, Gao Dong commanded the police officers to carry out detailed inspections on each floor, not letting go of any suspicious things, including inside and outside the windows. I've been busy for several hours, but I found nothing else except the piece of iron nailed to the corner of the wall on the sixth floor. Gao Dong sighed in distress, could this piece of iron be the clue?But he looked at this piece of iron, and still couldn't think of any connection. Helpless, he can only ask people to collect all the surveillance videos in the community first, and at the same time arrange for people to continue to investigate each household in the unit building door by door. In addition, other residents in the community also need to conduct visits and investigations. The interpersonal investigation of friends should also start immediately. By the way, in order to avoid being criticized that Wang Baoguo died less than two weeks ago, and another court president died of dereliction of duty, Gao Dong could only report that it was an accident.But after Gao Dong's investigation today, he knew very well in his heart that this was not an accident, and the murderer this time might be a bit level.