In the morning, in the office of the Xiao team of the police station, Shen Cheng was discussing the case with the Xiao team. Hongyu pushed open the door and walked in, holding a document in his hand.

"The inspection report is out." Hongyu said, "Teacher Sun has a lot of hallucinogens in his blood, what is it called? Ergot...."

"Ergot diethylamide, abbreviated as LSD." Shen Cheng took over and continued, "It is the same drug in the body of Professor Wang, who died before, and the dose is large enough to cause extreme panic and cause cardiac arrest. ”

Team Xiao touched his chin with his hand and listened carefully to what he had to say.

"The murderer committed the crime by drugging, and considering the previous letter, the murderer has a clear target."

"That's right, Professor Zhang and these two teachers share a psychotropic drug project." Hiroha went on to say, "An overdose of this drug can have serious side effects.

"The person we're looking for can't shake off his fear because of his visual vision, and that's what his eyeballs are all about. These actions are of a clear mission, and he is taking revenge on those who caused the situation to come here. ”

At this point, the fog in Team Xiao's heart completely dispersed.

"That suicidal schoolgirl was involved in that pharmaceutical project." Hongyu said to the two.

When he finished speaking, the three of them stood in the office and looked at each other.

Team Xiao stretched out his index finger and pointed at them and said, "We need to find Professor Zhang, let's go to her residence now." ”

Then, the three of them went to Professor Zhang's home, which is located in the northern suburbs of Hanning City, which is a western-style building area, and the greenery is very good.

Professor Zhang's home is a three-storey western-style building with triangular eaves and an attic on the third floor. A few people were in the living room on the first floor, and there was a fireplace on the south side of the room, surrounded by bronze sculptures, mostly imitations of Milon.

"Li Zheng was undergoing a psychotropic drug trial when he committed suicide." Professor Zhang found a sofa and sat down, and said to them.

"Did you give them orders?" Hirowa asked.

Professor Zhang frowned, and replied with some unhappiness: "This is an era when everyone is equal, and no one forces them to do anything. ”

"You're lying, Ms. Zhang." Shen Cheng saw through her lies and pressured her, "You use your degree certificate and power to oppress them. ”

Professor Zhang was dumbfounded for a moment, closed his mouth and shook his head helplessly.

"How many students participated in this trial?" Team Xiao asked her.

"There are quite a few."

The corners of Shen Cheng's eyes twitched, and he asked, "Does anyone among them have signs of hidden psychosis?" ”

Then, he took a folder from Hongyu's hand, which contained the letter written by the gangster earlier, and stuffed it into a plastic cover.

"We're looking for a man, about 28 years old, Han Chinese."

He handed the document to Professor Zhang's hand,

"His writing habits are becoming more and more deformed, indicating that his mental illness is worsening."

Shen Cheng looked at her and described his profile image to her.

"He may show immaturity in social habits, a significant decrease in personal hygiene, a decline in grades, and an undesirable emotional ..... on certain occasions"

After listening, Professor Zhang's face twitched visibly, she closed her eyes, and her brows tightened.

"Xu Hongyun." She opened her eyes, looked at them and said, "He's one of my PhD students who dropped out of school a few months ago. ”

"Let me guess, he can't handle the pressure of doing a Ph.D." Hongyu interjected, and the upward arc of his mouth was full of mockery.

Professor Zhang looked at him sarcastically, and there was nothing he could do but be silent.

"Hundreds of students participated in the trial, but none of them had side effects." She pleaded with them.

"But he's an outlier." Shen Cheng looked her in the eye, "There is a tricky paradoxic schizophrenia in him, and your experiments are an endless scarlet paradise for him." ”

"Then when he learned the news of Li Zheng's suicide, he decided to start revenge."

After listening to his words, Professor Zhang's expression was a little self-reproachful, and she lowered her face and sighed, but that didn't help. In the first place, she should not have relied on her power to unconditionally use these students as guinea pigs.

Now that they have the identity of the murderer, they need to investigate the information about this person further. Before leaving, Team Xiao gave Hongyu a look.

At nine o'clock in the evening, the street lights in the suburbs have been extinguished, leaving only the lights of the western-style pavilions, accompanied by the crickets in the grass, adding a quiet to the night. It's uninhabited, and it's surprisingly cold at night.

Hong Yu and Shen Cheng were sitting in a black car on the side of the road, if it was a police car, it would be discovered by gangsters, so they drove Shen Cheng's private car.

Hongyu looked around, and after confirming that there was no abnormal movement, he leaned on the co-pilot, chewing gum in his mouth. Inadvertently, he saw a picture frame behind the wheel.

"Is that your wife?" Hongyu asked, pointing to the woman in the photo.

The woman in the photo is very beautiful, looking twenty-seven or eighteen, wearing a long navy blue dress, hugging Shen Cheng. In the background, under a coconut tree by the sea, both men look happy.

"Ahh She is my ex-wife. Shen Cheng took the photo frame in his hand and sighed a little sadly.

“.... I'm sorry..."Hongyu looked at him, not knowing what to do for a while, "I didn't know before..."

"It's okay." Shen Cheng smiled at him and stroked his hand on the photo.

"At that time, I was a little too dedicated to work, and when I looked back, I realized that she had come so far that she didn't even reach out and hold ......"

The atmosphere in the car suddenly became sad, and Shen Cheng also noticed this, and after his eyes moistened for a while, he put the picture frame back into the distance and cleared his throat.

Shen Cheng looked at Professor Zhang's door, thought for a while, and said, "I need to ask her some more questions, for the sake of profiling." ”

After saying that, he pushed the car door open and walked towards the house, leaving Hongyu alone on duty outside.

"Professor Shen, I've read your paper before."

Professor Zhang sat on a leather sofa in the living room, diagonally opposite Shen Cheng. It was late in the day, and the crystal lamps in the living room were scattered with a yellowish glow, blending with the flames in the fireplace.

"The post-fear response you raised in this article is very interesting, and our trial has also looked at it, and found that substances secreted by the amygdala when people are afraid are actually effective in relieving symptoms like PTSD."

Unlike other animals, humans are able to analyze and process their fears, and once they know that they are not in danger, they will no longer be afraid.

Shen Cheng responded with a smile, post-traumatic stress disorder (PTSD) has plagued many people for many years, and the causes of its onset are also wide-ranging, from domestic violence to life and death.

He has treated many such patients, and there is a pain hidden in their smiles, and Shen Cheng feels very sorry, so this is also one of the motivations for him to be a psychiatrist for a long time.

"Brownlowe said that we can also be frightened, but we don't just run away like a frightened rabbit, but we reassess the situation and realize that we don't need to fight or run away, and then it's business as usual." Shen Cheng said to her.

"So I came up with the idea that if there was a way to make patients realize that those hallucinations were not real, and no longer feel fear of them, would PTSD be cured at the source."

His theory is that when fear is over, your heart rate and breathing rate will drop, goosebumps will fade, and your body's internal cognitive system will relax, which is a great feeling.

Some people even deliberately allow themselves to experience frightening sensations, such as watching horror movies, riding roller coasters, etc. Brownlowey points out that they are looking for ecstatic sensations that arise when the fear fades under the influence of chemicals released by the body.

Professor Zhang picked up a cup of flower tea on the table, raised it to his lips and took a sip.

"So have you ever had a similar experience, ecstasy after fear?" Professor Zhang asked him respectfully.

Shen Cheng thought for a while, recalled what happened at school at noon yesterday, and couldn't help but smile.

"Hmm.... There were. He nodded helplessly, "I was almost killed by Teacher Sun yesterday." ”

Hearing this, Professor Zhang was stunned for a moment, and then laughed with him. Shen Cheng glanced at the bronze sculpture next to him and became interested.

"Is this Milon's Athena?" He asked, walking up to the bronze statue.

Professor Zhang nodded and said, "That's right, this is a high imitation, I didn't expect you to have some research on Greek mythology." ”

He looked back at her and smiled,

"No, it's my ex-wife's favorite, she's a historian."

Professor Zhang shrugged her eyebrows, she didn't expect to accidentally provoke such a topic. Suddenly there was no speech in the room, the fire in the fireplace was still burning, and she looked at the dancing flames, raised the cup of flower tea and took a few sips.

I don't know if it was because of the cold weather that caused the joint pain, she felt some discomfort, and the blanket on her lap was not relieved by draping it over her shoulders.

Shen Cheng stood in place, looking around. Suddenly, an unusual sculpture caught his attention, and there seemed to be something strange on the face of the sculpture.

He walked over slowly, and after seeing the appearance of the sculpture in front of it, a shiver exploded in Shen Cheng's heart, spreading from the back of his neck to his whole body like an electric shock, not letting go of every inch of nerves.

In the eye socket of that sculpture was a pair of lifeless human eyes, staring straight at Shen Cheng.

"I'll look at everything for you....." Shen Cheng snapped back to what was written in the letter, "He's been here, and this is where his last revenge is..."

"Professor Shen...."

He turned around and saw Professor Zhang stroking his forehead, his body bouncing straight forward.

"Something is wrong... My consciousness was a little confused, and my pulse was racing. She looked at the flower tea on the table, "Because... Because of this tea...."

Shen Cheng quickly walked to the cabinet, picked up the box of flower tea leaves, smelled it, and said, "Someone drugged you." ”

Professor Zhang's vision began to blur, her body staggered, she squinted and said, "The floor.... The floor is melting..."

Shen Cheng leaned down and put his hands on her shoulders, and said solemnly, "Concentrate, we have to get out of here quickly." ”

As soon as he finished speaking, the crystal lamp overhead suddenly went out, and the whole room fell into darkness, except for a little spark in the fireplace, dancing on a few short logs that were almost burned to the same extent, in a strange manner.

"The lamp... Turn on the lights, turn them on...."Professor Zhang shook his tongue and looked panicked.

Shen Cheng walked in the direction of the wooden door of the living room, and when he just pushed the door open, he saw a tall black shadow appear on the back door of the house, and the black shadow was standing outside the door, slowly turning the handle of the door.