The Genius Female Forensic Pathologist, The Psychological Anatomist

After returning to the station, Fang Rui convened a case analysis meeting.

Fang Rui analyzed, "This doesn't seem to be a medical accident but a murder. The hospital's medication process is very standardized, so it's unlikely they would make such a basic mistake as pouring insulin into an IV bottle."

Zhang said, "So Lin Sen was right; there really is a serial killer in the hospital. If it weren't for the patient's family making a big fuss, this case wouldn't have come to light."

Lin Sen, displeased, corrected, "Please replace 'guessed' with 'analyzed.' Otherwise, it makes me seem very unprofessional."

"..."

Fang Rui said, "I don't think Li Xiaolan is the murderer. The killer wouldn't be so foolish as to target a patient during their own shift."n/ô/vel/b//in dot c//om

Zhang agreed, "And Li Xiaolan has poor psychological resilience. Such a person wouldn't be able to become a serial killer."

Mu Mian said, "Insulin can be purchased online and at pharmacies, so it's difficult for us to trace the source of the drug. However, adrenaline is a controlled substance. If Yang Yang's death is also connected to this killer, then she must have stolen adrenaline meant for someone else. Following this lead, we might be able to catch the killer."

Fang Rui agreed, "And since Yang Yang was hospitalized in the neurosurgery ward on the sixth floor, if the killer tampered with the medication, they would have had to go to the nurses' station there. We can check the surveillance footage to see if any nurses from other departments visited the nurses' station on the day Yang Yang died."

Fang Rui thought of Grandma Ye and added, "Could the killer also have been to the Ye household?"

Chen Xue said, "It's possible! Ye Yu mentioned that her grandmother suddenly felt very cold that night. Could it be that the killer gave her some kind of drug, causing her to feel that way? The carbon monoxide poisoning was an accident, which just happened to cover up her crime."

Mu Mian said, "The deceased's blood showed no abnormalities; she died from carbon monoxide poisoning. However, that light green pill is a bit suspicious. Its composition is still being analyzed. We'll discuss it further once we have the results."

Fang Rui decided to divide the investigation. Mu Mian and Chen Xue would look into the hospital's adrenaline usage; Li and the others would check the surveillance footage.

Fang Rui and Zhang drove to the Ye household. Ye Jianmin was out working in the fields, leaving only his daughter, Ye Yu, at home.

Zhang asked, "Ye Yu, do you recognize the nurse who often came to your house to treat your grandmother?"

Ye Yu looked at Fang Rui and Zhang. After thinking for a moment, she nodded, "I recognize her."

"Is it her?" Fang Rui showed Ye Yu a photo of Li Xiaolan.

"Yes, it's her."

"Are you sure?"

Ye Yu nodded.

At that moment, Ye Jianmin returned. Seeing the police again, he was a bit annoyed, "Officers, why are you here again?"

"Was the nurse who often visited your home her?"

"No, she only came once. The nurse who came frequently was someone else. That nurse had bigger, rounder eyes, very beautiful eyes, not her!"

Li Xiaolan had single eyelids and puffy eyes, making her eyes smaller than normal.

Fang Rui showed Ye Jianmin photos of all the nurses from the neurology department, "Mr. Ye, can you identify which nurse it was?"

Ye Jianmin carefully examined the photos and immediately shook his head, "They all look the same to me; how can I tell? That nurse always wore a mask, so I can't remember her face, just that her eyes were big. You should ask my daughter; she definitely knows. She was quite close to that nurse."

Hearing Ye Jianmin's words, Ye Yu looked down at her toes, visibly flustered, as her earlier lie had been exposed.

Zhang handed Ye Yu a chocolate and crouched beside her, softly saying, "Can you tell the police uncle who the nurse sister was? We need to find her urgently. Here are some photos; can you help us identify her?"

Ye Yu didn't take the chocolate and remained silent.

Ye Jianmin kicked her, "Are you mute? I'm asking you something; answer them!"

Fang Rui glared at him, "What are you doing kicking a child? In front of the police, you dare to abuse your child?"

"Oh, I was just in a hurry. This child has a strange temper; if I don't hit her, she won't tell the truth."

Ye Yu still didn't speak. After a few seconds, she extended her finger and pointed to a photo of one of the nurses.

The nurse was named Zhang Shan.

Zhang said, "Ye Yu, thank you."

On the way back, Fang Rui drove, while Zhang analyzed the photos, "It seems Zhang Shan's involvement is quite suspicious."

"It's not her."

"Boss, are you saying Ye Yu was lying to us?"

"Ye Jianmin said the nurse's eyes were bigger than Li Xiaolan's, but this nurse has single eyelids and not particularly big eyes. Ye Yu probably just pointed at a random photo."

"No wonder she didn't take my chocolate. But why didn't she tell the truth? She doesn't even know why we're looking for that nurse."

"Maybe she does. So she's protecting that nurse."

"Should we go back and press Ye Yu for more information?"

Fang Rui said, "If she doesn't want to speak, pressing her won't help."

Zhang suddenly had a theory, "Could it be that the nurse incited Ye Yu to use the charcoal method to kill her grandmother?"

"It's possible." Fang Rui recalled that when Ye Yu confessed to them, she specifically mentioned opening the window and placing a bowl of water, indicating she knew charcoal burning could cause carbon monoxide poisoning.

Zhang idly flipped through the photos of the nurses, joking, "Xiao Wang's girlfriend also has pretty big eyes. Among these, her eyes are the most beautiful."

Fang Rui and Zhang suddenly fell silent.

Fang Rui said, "To avoid suspicion, Xiao Wang shouldn't be involved in this case."

"But Chen Shu is such a nice person; how could she be a psychopathic killer? She's usually very kind."

"She's currently a suspect."

Mu Mian and Chen Xue questioned hospital staff. Mu Mian discovered a loophole: during emergencies, doctors usually administer adrenaline based on the patient's condition, not using an entire vial. This means that after using half a vial, the remaining portion would be disposed of as medical waste.

The killer likely collected adrenaline this way.

Li's surveillance investigation also made progress. There was a camera in the neurosurgery nurses' station.

The camera captured footage of a nurse entering the medication storage room at 12:31 PM on the day Yang Yang died. She stayed for about two minutes before leaving.

At that moment, Yang Yang's grandmother walked by the nurses' station carrying a thermos. She stopped the nurse and spoke to her. The nurse smiled and answered her question.

The camera then captured the nurse's face. Although she was wearing a mask, Li immediately recognized her.

"How could it be her?" Li exclaimed in surprise.

Li hurriedly went to inform Fang Rui and the others of this development.

"Captain Fang, I've found a suspect," Li reported, "The surveillance footage shows that on the day Yang Yang died, she visited the neurosurgery nurses' station. But she's a nurse from the neurology department; why would she go to the sixth floor? She even spoke with Yang Yang's grandmother."

"Who's the suspect?"

"Chen Shu... Xiao Wang's girlfriend."