After supper, everyone went back to rest.

Ding Fan sent Qin Lu back to the room, cleaned up the house briefly, washed up and fell asleep on the bed.

Early the next morning, everyone's work was assigned and they set off, leaving Ding Fan alone, as if he had nothing to do by himself.

Since there was nothing to check, I simply went around the scene to see the situation here.

After looking at the surrounding environment, he can also see who lives around him, and maybe something can drive his thinking.

Just sat on the side of the road, and Ding Fan sat for a whole day.

For a whole day, he was like a stone man, looking at the people coming and going around him, and he didn't know what he was thinking in his head, and he glanced at the time from time to time, until more than three o'clock in the afternoon, Ding Fan finally stood up and stretched out his hand to bounce the dust off his body.

This family of five, the time of death should be at this time.

At more than three o'clock, there are very few pedestrians on the street, after all, those who go to school have not finished class, and those who go to work have not come back, at most, they are a bit of housewives going out, and they are also going to the vegetable market, and no one will take this road.

The street of Huayuan Road is not a thriving section of the road in normal times.

If the murderer chooses this time, it is indeed not easy to be discovered.

After calculating the time when he climbed over the wall and entered the scene, the time of about three o'clock, the position of the sun, just at this angle of south-west, the time in August, the temperature at more than three o'clock should be very hot, and it is normal for no one on the street, many people are afraid that they have fallen asleep because of the high temperature.

It seems that this murderer is relatively familiar with this street, and if he follows this line of thought, this time and place is likely to be carefully planned, and he did not do it by chance.

Judging from the clues that have been obtained at the moment, the murderer's height should be around 1.7 meters and his body is strong, otherwise he will not say that he is a murderer, I am afraid that it will be a little difficult to even climb to the second floor.

The room on the second floor, Zhou Wei's room is the first entry position, the window of the room is not big, the width is about eighty centimeters, since the murderer can enter the room without disturbing Zhou Wei, it means that his figure is not very fat, at least there will not be too much noise when entering.

Generally, this kind of criminal who enters through the window is not a veteran.

Ding Fan has seen this house before and after, there is no mark left by the thief, and the back door has not been tampered with, normally the thief is really reluctant to go through the window when it is not necessary, especially the child's room.

One is that it is easy to make noises, who knows what will be in those children's rooms, and it will make a sound when they touch it slightly, isn't that asking for trouble for themselves?

Secondly, when you enter the child's room, it is difficult to determine whether the child in the room is asleep.

A half-old child, you just want to get him to sleep is a little difficult, if it is not necessary, the thief will not choose such a path.

So in Ding Fan's opinion, this murderer is at least not a habitual offender, it is very likely that he has never done such a thing before, and this is the first time he has done it.

However, as soon as it was sold, it was planted, and the thing was not stolen, and it was directly discovered.

A family of five was killed, and after the killing, according to the peeping kid opposite, the murderer did not leave the scene immediately, but stayed in the room for a while, and did not leave the scene until after dark at night.

This is also in line with Ding Fan's judgment, the real thief, no matter what he did at the scene, he must leave first if he has the opportunity, and he has never heard of a thief who will stay at the scene after stealing something.

It is speculated from the time that the murderer should have stayed at the scene for several hours, and perhaps washed the blood stains on his body, resulting in the poor lack of clues in the final detection process of this case.

But it happened that because of his choice, Ding Fan thought of a possibility.

In one day, he killed five people, but he was not in a hurry to leave, but hid in the room for a period of time, and hid for several hours.

When it was dark in August, it should have been around half past seven, and there were street lights outside, and at this time he wanted to go out from the main entrance, which was obviously impossible, so he chose the window.

It happens to be the location behind the street lamp, and when you go out from here, it is really difficult to find that there are people in that location without looking carefully.

In other words, the murderer was at the scene and stayed for about five hours.

What has he done in it for so long?

Rummaging for something?

The scene didn't look very messy, although there were some traces of turning, but the deceased was preparing to move, and it was normal for the house to be a little messy.

However, only the first floor and attic have traces of rummaging, but the second floor does not.

Could it be because this murderer knew that there would be nothing on the second floor, so he subconsciously didn't look for it?

There are only two old people and one Zhou Wei who live on the second floor, and there is really nothing of value on these three people.

An old teacher couple plus a child, generally speaking, there is really no money, especially children!

It seems to be normal, but when Ding Fan was sitting outside, he suddenly thought of a key question.

The situation at Xu Wenshan's family, why did the murderer seem to know it himself, and he was very targeted when he started it.

Only a little rummaging was done on the first floor and the attic, and there was no trace of it on the second floor.

Thinking of this, Ding Fan hurriedly took the phone and called Qin Lu and asked who the freshest fingerprint was on the light switch on the first floor during the search at the scene.

At that time, fingerprint technology was relatively mature, and this point would naturally not be ignored, and relevant information was quickly found.

The conclusion was that the latest fingerprints on the switch turned out to be those of Zhou Xiaowu and his wife.

That's not right, when Zhou Xiaowu was chased and slashed, I'm afraid I didn't have time to turn the lights on and off!

Could it be that after the murderer killed Zhou Xiaowu, he didn't need to turn on the lights to rummage through things?

Ding Fan has been to the scene, the first floor is relatively messy, a lot of hardware is placed everywhere, and even the windows on the first floor are blocked by shelves, that is to say, without opening the door, there is basically no light on the first floor.

Zhou Xiaowu's own place in his house, he may not need to turn on the lights when he goes downstairs because he is familiar, can he also be a murderer?

In this way, the person who is most familiar with the scene and has not yet died seems to be the pony!

In addition, when Xu Wenshan died at that time, his expression was indignant, more like he was very disappointed in someone, indicating that Xu Wenshan may know this murderer.

So the possibility of committing a crime on this road is really getting bigger and bigger.

First of all, Ma Lu was very familiar with the scene, and secondly, he also knew that Mr. Xu and his wife did not have any money in their hands, and there were only two places that were turned over after the killing, that is, the cash register on the first floor, and then in the attic.

But this time he came a little late, and the previous things were basically sent away because of the move, and he didn't get anything valuable this time.

So at noon the next day, he still wanted to go to the new house to look for it, but he didn't expect that there was someone watching the new house, so he went

When he happened to meet Xu Ming, in broad daylight, he was not easy to do, so he had to pretend that he didn't know anything, followed Xu Ming to the scene, pretended not to know anything, took a look at the situation in the house, and called the police.

It is very likely that he is just shouting to catch the thief, and calling the police just to cover up his sin.

It seems that this conjecture seems to be very complete, and the road almost meets all the characteristics of the murderer, but the real hammer that can really finalize him is not a guess that Ding Fan came up with himself.

All this depends on the evidence, there is evidence to arrest people, without evidence, everything is in vain, even if the road is really the murderer, in the end there is no evidence can only release people.

Ding Fan stood at the door of the crime scene and thought for a long time, and finally took out the key from his pocket, walked into the crime scene five years ago again, and re-enacted the case by himself.

This time, he followed the order of the killings he had speculated before, step by step, until he finally killed the last person imaginary, and then he stopped and glanced at the time in his hand.

Basically, it can be determined that it takes about 20 minutes for the murderer to complete this whole set of actions to rummage through the scene, and there are also certain requirements for physical strength, I am afraid that the murderer is a person who is engaged in physical work all year round outside.

Again, this point is on the opposite side of the road.

But this time Ding Fan didn't leave, but was thinking about what the murderer would do after the killing, after all, the murderer did not leave the scene for the next few hours.

And this Ding Fan also deliberately found the opposite location to determine where the figure seen by the opposite person at that time was.

Unexpectedly, Ding Fan finally determined for a long time, and the only position where the opposite side could clearly see the figure was by Xu Wenshan's side.

In other words, the figure I saw on the opposite side at that time was not actually looking for anything, but had been facing Professor Xu.

"Could it be that this murderer is a psychopath?"

After killing someone, he didn't leave, and in the end, he was still standing in place, looking at the person he killed.

In this narrow corridor, the murderer actually sat face to face with a dead man, what else did he say?

Although this idea is a bit confusing, it seems that the possibility is not small.

Other than that, there doesn't seem to be any clue to be found at the scene.

Just as Ding Fan was about to leave, he overheard a strange sound in his ears.

It's like the sound of the wind, and it's the sound of air colliding with each other in a small space.

Ding Fan slapped the wall all the way, and finally found this almost hidden partition next door to the kitchen.

Looking at the inside, it should be a small cubicle for washing, and there is a pipe underneath, which should be used for washing, but the outside is pasted with a piece of paper of the same color as the wall, which is not very noticeable.

"It's been years that no one has used it, and the sewer pipes on the ground are rusty. ”

Just after a glance, Ding Fan planned to close the door and leave.

But after glancing at the ground, Ding Fan's movements froze instantly.

Rust is generally brown and will be very dark, but it will take a long time for rust to turn completely black.

On the contrary, it takes a short time for human blood to turn pure black, as long as it is oxidized blood, it will soon turn black.

"I really can't imagine that this simple little toilet has been ignored, but it has shed some old clues!"

There is no ventilation inside the small room, only a pipe leads to the small waterway outside, and it is estimated that outsiders will not notice this place.