Although the hope was slim, Xu Lin still asked Fang Qingying to collect blood samples from the four murderers.
After testing, the results were naturally unsatisfactory.
There are no toxins in their bodies.
He then took the people to Fengyang City No. 1 Hospital and conducted a detailed physical examination on them. He even visited a psychiatrist. The results proved that except for anxiety and sub-health, they had no problems.
Xu Lin asked everyone to leave first, and he came to the psychological counseling department of Fengyang First Hospital.
"Hello, Dr. Huang."
Xu Lin looked at the well-maintained woman in front of him who was about 40 years old, and nodded slightly towards her.
"Comrade police, do you have any more questions?"
Dr. Huang asked slightly surprised.
Xu Lin: "Dr. Huang, I just want to ask, if I want someone to kill someone, what means can be used to make him forget what he has done? Or even... completely forget that I asked him to kill someone. people."
As soon as he said this, Dr. Huang couldn't help but shake his head and smile.
"Comrade police, we are psychiatrists, not gods. I have never heard of such a thing. I can guarantee that even the psychiatrists in the whole world, not to mention our Daxia, can't do it."
"Hypnosis and psychological suggestion are actually a kind of intervention in other people's hearts. What you said has reached the level of deleting memory. This method can only be used by no one except gods."
Xu Lin shook his head slightly: "Dr. Huang, things are not so absolute. I remember there is a drug abroad that can make the person who takes the drug lose short-term memory and become a stupid person."
Doctor Huang: "Comrade policeman, you said he was crazy. Are you sure that in that state, he can still kill people for you?"
Xu Lin smiled bitterly for the same reason.
At present, there is really no way to explain why the murderer lost all his memory after killing people.
"Sorry to bother you, Dr. Huang. I may have some questions in the future that I need to ask you for advice," Xu Lin said.
"No problem. It is also our responsibility to cooperate with the police comrades in handling the case." Dr. Huang smiled at Xu Lin, then lowered his head and looked at a medical record.
Xu Lin got up and left the hospital and rushed back to the city bureau.
In the city bureau, after Xu Lin came back, he interrogated Tang Huashan and Ren Danian again, asking them what they had eaten before the crime, or what accidents they had had, etc.
As a result, all four of them shook their heads, saying that they were the same as usual and there was nothing unusual about them.
There was no problem with the murderer, so he immediately went to the forensic department. According to Fang Qingying's explanation, there was definitely no toxin in the five corpses.
"It's really tricky." Xu Lin stood in the corridor, holding a cigarette in his right hand and looking into the distance.
"Team leader, we have discovered something."
At this moment, Xiao Xue's voice came from behind.
When Xu Lin heard this, he immediately turned his head, looked at her, and asked, "What did you find?"
"We investigated the people who had been in contact with the deceased and found that although they studied in two schools, the two schools were very close. Fengyang University and Fengyang University of Technology are only separated by a street. And that street is A commercial street with shops on both sides.”
"We learned that these five deceased people all liked to go to a bar called 'Tuberose'! But this bar closed six months ago, and the owner and the waiters are said to have returned to their hometowns."
"There is another thing, that is, the four murderers also went to that bar."
The deceased and the murderer all went to a bar. This is indeed a big discovery.
Xu Lin asked: "How was the business of that bar before?"
Xiao Xue: "Business is booming, and there is an endless flow of customers almost every day. In addition to college students, there are also many people in the society who go there. I heard that the charges are still very high. I did a rough calculation. This bar The monthly profit is at least 800,000 yuan."
Xu Lin smiled and asked, "If it were you, would you let go of a chicken that lays golden eggs?"
"No." Xiao Xue shook her head without hesitation.
"Find me the bar owner and the old guys. Find them for me." Xu Lin immediately gave the order.
"yes!"……
While all members of the special case team went to investigate the bar owner, Xu Lin went to four crime scenes with Zhu Yan and the others.
These four crime scenes are relatively far apart, spanning almost half of Fengyang City.
Two of the sites are rental houses, and the other two are in communities.
In the current society, public security control is very strict. There are cameras everywhere on the streets and in communities, even in urban villages.
It is almost impossible to kill people silently without being discovered under such surveillance.
In today's society, within a few hours of a murder, the police are almost 100% able to identify the murderer or suspect, relying on pervasive surveillance equipment.
If it's a mountainous area, that's definitely not possible.
But in urban areas, even if you are in a place with poor security environment, you will definitely be dug out quickly.
The scene is rough and barely covered.
The murderer's fingerprints, footprints, and crime tools were all extracted.
All of this is consistent with the characteristics of passionate murder, but the problem is... the murderer seems to be completely unaware of what he is doing.
"Team Leader Xu, we surveyed the site more than once and almost moved the site back. Everything was dismantled and restored to its original state."
"Apart from the fact that the wall has not been knocked down and the ground has not been dug up, there really is nothing missing." Dang Lin said with a wry smile.
The two of them, veteran detectives, have been working together all their lives and have never seen such a difficult case.
Xu Lin nodded slightly. He also looked at it and found that it was indeed of little value.
However, there are too many things that can be found at the crime scene. Even if there is no direct evidence, what if there are some clues left?
He said: "Director Zhu, I want to see the footage captured by the surveillance camera when the murderer left."
After hearing his words, Zhu Yan immediately said: "Let's go back to eat first. After eating, go directly to my office and I will give you everything."
Xu Lin nodded and immediately returned to the city bureau with the two chief and deputy directors. After having a meal in the cafeteria, they came to Zhu Yan's conference room.
After getting all the information, Xu Lin had no intention of chatting with Zhu Yan and Dang Lin about the case. He focused on watching the surveillance footage.
In the first Tang Huashan case, this guy spent nearly half an hour entering a rental house. When he came out, there was already a lot of blood on his body.
But when he came out, he went straight downstairs and drove back home as if nothing had happened.
