The crime squad team came to the mental hospital to investigate, and He Jiahui also followed.

Arriving at the crime scene, He Jiahui first observed the surrounding environment.

Yang Lixin is a serial murderer and a felon. Even when he is receiving treatment, he is locked in a single room.

There are no windows in the single room, there are ventilation holes on the ceiling, and there is an observation port on the door, so you can see what's going on inside. In other words, you can only come into contact with the people inside through the door.

He Jiahui looked at the deceased on the bed again, and it was indeed Yang Lixin.

Yang Lixin's hands were covering his chest, his body was slightly curled up, and his face was distorted. It looked like he was in great pain before he died.

"It looks like there is no trauma on his body! He is covering his chest with his hands and his expression is painful. It is most likely that there is a heart problem, causing sudden death."

As He Jiahui spoke, he looked at the director of the mental hospital and asked, "Do all the patients here have to undergo a physical examination before they are admitted? Is there anything wrong with Yang Lixin's health?"

The dean shook his head decisively: "I have brought the patient's physical examination report when he was admitted. He is in good health and has no heart problems."

"What about your medication? Is it caused by the side effects of the medication?" He Jiahui asked again.

"We strictly abide by medical instructions when administering medications to patients. And according to the mental evaluation report, this patient's condition is not serious. There is no need to use powerful sedatives, and there should be no serious side effects."

The dean replied immediately.

He Jiahui nodded and continued: "If there are no problems with the patient's body and there are no problems with the hospital's medication, then Yang Lixin will most likely die of poisoning!"

"Poisoned?" Ma Jun next to him continued: "Before the patient comes in, he must not bring personal belongings. Yang Lixin is a repeat offender and will check carefully. It is impossible for him to bring poison in.

Moreover, Yang Lixin’s lawyers claimed that he had mental problems, which also shows that Yang Lixin should have a relatively strong desire to live and that he did not want to die. If he was poisoned, then he most likely died of murder."

He Jiahui then asked: "Dean, are there any other patients who feel uncomfortable or have other abnormal symptoms?"

The director thought for a while and replied: "I haven't found any patients who are not feeling well. As for abnormal behavior, this is a mental hospital, and every patient sent here behaves abnormally."

"All the other patients are fine. Only Yang Lixin died of poisoning. This should be a murder specifically targeted at him." He Jiahui then asked: "Dean, who had contact with the deceased yesterday?"

"Well, I'm afraid there are many doctors, nurses, caregivers, cleaners, and patients who may have come into contact with him." The dean paused and then said:

"Sir, let me introduce to you our work and rest time here. Every morning at 6:30, the wake-up bell rings. From 6:30 to 7:30, it is time to wash up. At the same time, we will play soothing music throughout the hospital.

Music helps patients calm down.

After washing up at 7:30, it is breakfast time. All patients will go to the restaurant to have breakfast and return to their rooms after breakfast. After that, we will distribute medicines to the patients and let them take them. This process usually lasts until after 8:30.

At nine o'clock, the doctor begins rounds, which usually last for an hour. At ten o'clock, snacks will be distributed to the patients.

From ten o'clock to eleven o'clock, it is free time. Patients can stay in the room, or go to the activity room to play cards, go to the entertainment room to watch TV, and go to the library to read and read newspapers.

At 11 o'clock in the morning, the second dose of medicine will be distributed and taken. Lunch will begin at 11:30. After lunch, it will still be free time, which will last until 5 p.m.

During this period, we will distribute fruits once, probably between two and three o'clock in the afternoon. After five o'clock in the afternoon, we will have dinner, and after dinner we will have free time.

At eight o'clock in the evening, all patients must return to their rooms, and then nurses will go to each ward, count the number of people, and give medicines to the patients. After the patients take the medicine, they can rest."

"Does Yang Lixin's work and rest time also look like this?" He Jiahui asked immediately.

"Except for those patients who are unable to take care of themselves and have violent self-injurious behaviors, everyone else is managed in this way. For patients with violent and self-injurious behaviors, we are worried that they will hurt other patients or themselves, which will limit their ability to move.

"The dean replied.

"Yang Lixin is the murderer of a serial murder case. He killed four people. Aren't you worried if you put him together with other patients?" He Jiahui asked again.

"In Stanley Prison, aren't the life-sentence prisoners also locked up with other prisoners?" The dean paused and then said:

"This patient has the ability to take care of himself and is in a good mental state. He has not shown violence or self-mutilation. It is impossible for us to restrict his movements. All we can do is give him a separate room."

He Jiahui sighed helplessly. Just through these few hours of free activities every day, Yang Lixin could come into contact with a large group of people. This was equivalent to searching for the murderer in the entire mental hospital.

"It's a complicated project to investigate so many people!" Thinking of this, He Jiahui said, "Director, we need information on all employees, patients, and visitors who came yesterday in the hospital."

The dean thought for a while, nodded and replied: "Yes, but there are a lot of people involved, so I need to give me a day to prepare."

…

Ma Jun took the forensic report and came to He Jiahui.

"The forensic doctor has concluded that Yang Lixin was indeed poisoned and died. To be precise, it was a compound that inhibited the central nervous system and caused cardiac arrest." Ma Jun said.

"That is to say, this is not a common poison." He Jiahui frowned slightly.

Common poison sources mainly include pesticides, insecticides, cyanide, arsenic, and poisonous plants. In addition, overdose or injection of drugs can also cause death.

When investigating poisoning cases, finding the source of the poison can often bring a lot of clues and even solve the case directly.

But this time, the poison in Yang Lixin was obviously not a common poison on the market. He didn't even know what kind of poison was in the deceased, let alone find the source of the poison, which undoubtedly increased the difficulty of solving the case.

"It seems that we can only use the most traditional method to screen people in mental hospitals!" He Jiahui said with some helplessness.

"This is a big project. The mental hospital sent personnel information, including staff and patients, totaling more than 500 people. If our team conducts screening one by one, it will take many days. You have to come and help." Ma Jun said.

.

He Jiahui pondered for a moment and then said: "When patients are admitted to the hospital, they are generally not allowed to bring personal belongings. They are unlikely to bring poison in, so you can leave them alone.

The staff does not go to work every day. There must be someone off work yesterday. Let’s start with the people who worked yesterday. If we add the people who came to visit yesterday, the scope will be much narrower.

Based on Yang Lixin's current situation, it is impossible to kill for money or love, so the murderer poisoning him must be a vendetta. And this can be divided into two possibilities, the enemy directly does it, or the enemy pays for the murder.

If an enemy pays for the murder, then the murderer will definitely receive a sum of money from unknown sources. We need to monitor who in the mental hospital starts spending money lavishly.

And if the enemy takes action directly, there will be two situations. One is that the enemy was originally in this mental hospital, and the deceased was admitted to this mental hospital, which just gave him the opportunity to take action.

The second is that the enemy entered this mental hospital specifically for revenge, and then waited for an opportunity to poison the deceased. Give priority to see who came to the mental hospital later than the deceased!"

In just a few minutes, He Jiahui determined the direction of the limited investigation.

Fortunately, He Jiahui's investigation was in the right direction, and the crime team quickly found the suspicious person.

"There are two cleaning staff who were hired after the deceased was admitted to the mental hospital. Who do you think one of them is?" Ma Jun asked.

He Jiahui didn't even think about it and answered directly: "Are you a relative of the victim in the Naruto murder case?"

"So you've already guessed it?" Ma Jun asked in surprise.

"I have already said that this is a vendetta. The only ones who have a deep hatred against Yang Lixin are the relatives of the four victims." He Jiahui paused and then said:

"Among the four victims, three were students at the Chinese University. Those who could be admitted to the Chinese University must have had high hopes from their families, but they were suddenly killed. How can their families not be resentful? Especially the parents of the deceased, they definitely have

Motive to kill.

Therefore, I think the family members of these three victims are more likely to commit suicide. As for the director of the property management office, he left behind an underage daughter and his family still has to take care of the child, so they should not commit murder.

"

"You guessed it right again!" Ma Jun sighed and continued; "The suspect we investigated is named Wu Meiqi, and she is the mother of the student vice president Fang Moxuan!

After Yang Lixin was imprisoned in the mental hospital, Wu Meiqi came to apply for a job as a cleaner in the mental hospital. She probably wanted to find an opportunity to get close to Yang Lixin and then poison him to death. In addition, she did come to work yesterday.

We just called and confirmed with the hospital that they did not know that Wu Meiqi was Fang Moxuan's mother. Wu Meiqi obviously concealed this on purpose when she applied for the job."

"Who recruited Wu Meiqi into the mental hospital?" He Jiahui asked immediately.

"Are you worried that there are Wu Meiqi's accomplices in the mental hospital? You can rest assured that we have checked and there should be no accomplices of hers in the mental hospital."

Ma Jun continued, "The salary of cleaning staff in mental hospitals is relatively low, and staff turnover is relatively high. Many cleaning staff will resign after not working for a long time, so mental hospitals recruit cleaning staff all year round.

And when recruiting a cleaner, you basically just fill in your phone number and address, but there is no checking on your family situation. I also asked the mental hospital, and they said that Wu Meiqi usually doesn’t talk much about her family situation.”

At this time, Ma Jun's mobile phone text message rang. He picked up the phone, looked at it, and then said: "The search warrant has been issued. Let's arrest Wu Meiqi now, and then search Wu Meiqi's residence!"

…

Wu Meiqi was not at home, and there was no one in her residence.

"I just called the mental hospital. Wu Meiqi didn't go to work today. Could it be that she ran away after killing people?" Ma Jun said.

He Jiahui walked to the refrigerator, opened it, looked at it, then looked at the closet, and said, "The refrigerator is full, and there is a piece of fresh ribs. The closet is also full, and I haven't brought any clothes from all seasons. There is a piece of fresh pork ribs in the refrigerator."

There is also a suitcase, so he probably didn’t run away."

"Then Wu Meiqi must have gone out for something? Let's stay and wait for her to come back," Ma Jun said.

He Jiahui asked: "If you were Wu Meiqi and you avenged your son, where would you go?"

"I understand!" Ma Jun nodded in realization, and then said: "Check immediately where Fang Moxuan's ashes are placed!"

…

In Hong Kong, although the columbarium provided by the government is very cheap, you have to queue for several years to get it.

The cheapest commercial columbarium costs 50,000 yuan, while the ones with better feng shui range from hundreds of thousands to millions. If placed in a place like a temple, the price is even higher.

What we are talking about here are square-sized columbariums, not cemeteries. The price of a cemetery in Xiangjiang is as high as a thousand-square-foot mansion, and only the rich can afford it.

Fang Moxuan's columbarium is located on the sixth floor of a building, which is a private columbarium.

When the police came here, they saw Wu Meiqi and her husband here. They were standing in front of Fang Moxuan's ashes niche, with their eyes closed and their hands clasped together, praying silently, as if telling Fang Moxuan that they had avenged him.

Take revenge!

Ma Jun stepped forward and said, "Ms. Wu Meiqi, regarding the murder of Yang Lixin, we need to ask you to go back and assist in the investigation."

Wu Meiqi opened her eyes and smiled calmly: "Okay, I'll go with you."

Then Wu Meiqi looked at her husband and said, "I have no regrets about being able to avenge my son. You have to take good care of yourself in the days to come."
To be continued...