There is an essential difference between a perverted murderer and a murderer.
There are two types of murderers: impulsive murder and premeditated murder.
But no matter what the situation is, the result is to kill the other party.
As long as the police conduct in-depth investigations around the victim, they can basically find the murderer.
Even if he can't be caught, there must be someone to suspect.
But it's different when a murderer kills someone.
Their motivations and purposes are often very simple, they simply want to kill people.
In other words, they kill because they like killing and kill for the sake of killing.
It is precisely for this reason that many cases committed by perverted murderers are difficult to detect.
First, the victims are random and have little connection with each other. Unless the murderer has a certain hobby, he will choose a fixed group of people, such as girls, young women, etc.
However, this kind of murderer is at the lowest end among perverted murderers.
Just like Luo Bin, the people he killed were basically children.
Because his purpose is to find a successor, or in other words, he wants to create what he considers to be a perfect artist, young children are undoubtedly the best choice.
As long as the police find what the victims have in common, they can basically identify the murderer.
But people like the shadow man and the original owner have no obvious hobbies, and the targets they choose are all random.
Of course, among so many people killed by the original owner, there are still some connections between them.
That means the original owner thinks they are sick!
However, this feature is not known to anyone except the original owner. Since others do not know it, it means it does not exist.
Secondly, in many vicious cases, there are obviously a lot of clues at the scene and they seem to be full of flaws, but they cannot be solved. Is it because the murderer is too cunning? Or are the police too incompetent?
These two possibilities are not ruled out, but the key factor is not here.
Many perverted killers do not feel that they are killing people, or they know that they are killing people and enjoy the process.
Whether they knew they were killing people or not, these people had one thing in common - they would not do anything unnecessary.
After all, the more you do, the more mistakes you make and the more flaws you have.
Unlike ordinary murderers, murderers don't care about being discovered. Some murderers even deliberately leave flaws and clues at the scene after killing people.
On the one hand, provoking the police and watching them run around like headless flies is to satisfy their evil taste. On the other hand, it is to seek excitement and put themselves in danger, so that they can force themselves to grow.
It's like walking on a high wire, dancing on the tip of a knife, looking for excitement in danger and getting pleasure from excitement.
But looking back at the Guo Zihao case, it was a torture and a secret room. The scene seemed clean and perfect, but there were flaws everywhere.
Creating a secret room is usually a method used by ordinary murderers to induce or confuse the direction of the police investigation. It seems very clever.
But real murderers disdain such small tricks.
No matter how clever the secret room is, as long as it is artificially created, it will leave traces and be seen through.
It's like a magician performing a magic trick.
When you understand the principles and mechanisms of magic, you will feel that the so-called secret room is nothing more than that. If it were you, you would definitely do better than the other person.
For a real murderer, instead of wasting time creating a secret room, it would be better to do other things, such as abusing the victim for a while longer.
To put it simply, the person who killed Guo Zihao was not a perverted murderer, but a premeditated murderer.
Whether it was killing Guo Zihao with a hammer, leaving a wallpaper with the word Y on his computer, or creating a secret room, it was just a trick to deceive others and interfere with the police's sight.
Even in Xu Mo's opinion, the murderer's modus operandi was worse than Song Lang's.
After all, Song Lang only left a Y mark at the death scene of Zhao Yiming's case. This move caused the police to continue to conduct in-depth investigations.
However, it can also be seen from this that the murderer of Guo Zihao was a novice.
Wang Qiang's death also proved Xu Mo's guess from the side.
Killing people in front of the police seems very smart, and you can blame them and keep silent, but in fact it is very stupid.
Who is Xu Mo?
People give him the nickname Great Detective.
A person who can assist the police in solving crimes must have a very high IQ. Would he do such a stupid thing as killing people in public, and also in front of the police?
"Are you too stupid, or do you think I'm too stupid?"
The corners of Xu Mo's mouth curled up into a sneer.
As for Xu Mo's previous choice to cooperate with Fang Mo, he just wanted to take advantage of the opportunity to do something.
On the contrary, Xu Mo found the deaths of Yu Jin and three others more interesting.
The murderer left only a scale at the scene, allowing Yu Jin and the others to make their own choices.
As a result, the murderer not only did not participate in the killing, but also successfully killed three people, leaving the police with no direction to investigate.
If it weren't for the two cases of Guo Zihao and Wang Qiang, the murder cases in unfinished buildings alone would have been a headache for the police for a long time.
It can be seen from this that the murderer who indirectly killed Yu Jin not only knew the three of Yu Jin very well, but also had a deep study of human nature.
Compared with the murderers who killed Guo Zihao and Wang Qiang, this murderer is more advanced and more in line with the characteristics of a perverted murderer.
"Three murders, three murderers, interesting."
Xu Mo was sitting in the corner, seemingly reading a book, but actually thinking about the case.
"Fang Mo, I wonder if you have thought of this?"
Thinking of this, Xu Mo's expression became strange, and he turned to look at An Xin, who was sitting at the door of the library, pretending to be a student and reading a book, but actually observing him.
Sensing Xu Mo's gaze, An Xin quickly withdrew his gaze and lowered his head to read seriously.
Looking at An Xin who was covering his ears, Xu Mo smiled.
Xu Mo was not surprised at all that Fang Mo asked An Xin to spy on him, but he also saw one thing from this incident.
Fang Mo's current situation in the police station is not very good.
In fact, it’s normal to think about it.
In the 404 case, Xu Mo was regarded as a suspect, and Fang Mo and Chen Shi refused to let him go.
At the time, it seemed that there was nothing wrong with Fang Mo doing this.
But with the exposure of Song Lang and Chen Shi, many people couldn't help but wonder, did Fang Mo really not notice anything strange? Does he really trust his apprentice that much?
Or is it that Fang Mo noticed it and had suspicions, but he deliberately turned a blind eye because he always suspected Xu Mo?
Although there is no basis for thinking this way, who can say clearly about the human heart?
In addition, this time there was another murder case at Baiyin University. Fang Mo did not go to the scene to investigate or investigate the case immediately. Instead, he went to find Xu Mo and took Xu Mo back to the police station without any evidence.
Even people who didn't think so before can't help but think in this direction.
"Fang Mo, you are so persistent. But if you let a new person monitor me, aren't you afraid of something happening to him?"
Immediately, Xu Mo closed the book, stood up, and walked straight towards An Xin.
