Grandma Mei looked at the photo and fell into memories. She seemed to recall many beautiful past events, and a faint smile appeared on her wrinkled face. But soon, her fingers began to tremble violently, and her eyes filled with tears. The girl in the photo gradually became blurry in her eyes. The old lady carefully put the photo back into her pocket.
Her throat felt like it had been rubbed with sand, and her voice was hoarse: " After Ruirui died, Li Zhemin moved away with his new wife. He never mentioned Ruirui's name in front of his son, Li Mo... Over the years, he has rarely visited Ruirui's grave on the anniversary of his death... Don't you think he's guilty? He must have killed Ruirui! That's why I killed him with my own hands on the anniversary of Ruirui's death!"
Xiao Lou looked at Yu Hanjiang, and Captain Yu also turned to look at him. The two exchanged glances, clearly neither of them believed her words.
Grandma Mei is too old and in poor health. How can we accurately inject insulin into Li Zhemin's body?
Moreover, the murder of Li Zhemin was clearly a meticulously planned operation. First, it required investigating Li Zhemin's diabetes; second, it required some medical knowledge, knowing what dosage of insulin could be lethal; and third, preparing the syringes and insulin would take time.
How did this elderly woman in her seventies, who has difficulty moving around, manage to do all this?
Yu Hanjiang looked at the old lady and whispered in her ear, "Aunt Mei, Li Zhemin is indeed unforgivable, but if you want to take the blame for the murderer, I suggest you don't take the risk. The police have many high-tech testing methods. We have already found the murderer's tools, the fingerprints on the syringe, and the source of the insulin. As long as we investigate, we will be able to find out the truth."
Grandma Mei's gaze was calm, her expression composed as if she knew she was about to die and had long been mentally prepared. She listened carefully to Yu Hanjiang's words, smiled, and said, "Young people, you should believe me. Even if the police investigate, the result will be the same: there are only my fingerprints on the syringe—because only I touched the syringe."
Xiao Lou said gently, "Auntie, you're so old, you can't even hold a syringe properly, how can you accurately inject the medicine into Li Zhemin's body? If you give her a few more injections, even if Li Zhemin is sleeping soundly, she'll be woken up by the pain, right?"
Grandma Mei said with a smile, "He won't wake up."
Xiao Lou was taken aback: "You mean?"
Grandma Mei coughed for a moment, clutching her chest, before whispering, "Whatever he fed Ruirui, I fed him too."
Yu Hanjiang and Xiao Lou were both shocked at the same time—could it be that Li Zhemin had taken sleeping pills before going to bed?
Grandma Mei chuckled, " Li Zhemin has a habit of drinking a bottle of milk before bed. The milk in his bag was given to him by me before he boarded the train; I added something to it, you know what I mean?"
Yu Hanjiang and Xiao Lou: "..."
Grandma Mei's smile faded, and she said coldly, "After playing cards at two o'clock last night, he did indeed drink a carton of milk before falling asleep. There were sleeping pills added to it, so no amount of noise could wake him. I am indeed old and my eyesight is not good, so when I gave him the injection, even if I poked him several times, he wouldn't wake up."
Sleeping pills are not visible on the surface; the deceased must be tested to detect them. Even Xiao Lou, a forensic doctor, couldn't directly determine that Li Zhemin had taken sleeping pills before bed. No wonder there was such a commotion last night, yet Li Zhemin slept like a log; it turns out the old lady was prepared.
Yu Hanjiang asked in a low voice, "Where did you buy the insulin?"
Grandma Mei said, "I asked Shu Ping to buy it. She has diabetes and can get a prescription for insulin from her doctor."
Xiao Lou asked in confusion, "Then why does Shu Ping use an insulin pen, but we bought you a syringe and injections?"
Grandma Mei laughed and said, "I asked the doctor, and he said that injecting medication subcutaneously with a syringe can be life-threatening if the dosage is too high, especially for patients with high blood pressure or heart disease. They have to be very careful with the dosage. This thing is much more convenient for killing people than an insulin pen. So I specifically asked Shu Ping to buy me the most traditional syringe and extractable insulin."
Yu Hanjiang and Xiao Lou exchanged a glance.
Grandma Mei had already prepared her entire explanation. While it sounded reasonable on the surface, it was actually full of holes. She asked Shu Ping to help her buy insulin, but Grandma Mei didn't have diabetes herself. How could Shu Ping buy it for her without even asking?
If Shu Ping really helped buy it, why did she hide in the food truck when she heard Shu Ping going to the toilet?
Clearly, Grandma Mei wanted to take all the blame upon herself—she was protecting Shu Ping, and perhaps the sleeping pills weren't administered by her, but by Shu Ping.
Yu Hanjiang paused for a moment before saying, " Shu Ping wanted to kill Li Zhemin, but you saw her tamper with Li Zhemin's milk and secretly take syringes and insulin, so you decided to take the blame for her... right?"
Grandma Mei's eyes were red, and she said in a trembling voice, "No! I killed him. You can check the fingerprints on the syringe and the insulin needle. I injected it myself. It has nothing to do with Shu Ping!"
She insisted that her fingerprints were on the syringe, which seemed illogical.
Normally, a murderer would deliberately erase their fingerprints, but she deliberately left them—this was clearly to make the police believe she was the murderer, thus protecting the real perpetrator.
Last night, the first time she went to the toilet, Shu Ping hid in the dining car; the second time, Shu Ping or
Perhaps unable to avoid it, the two met in the corridor. According to Zheng Weiguo's testimony, he heard Mrs. Mei and Shu Ping talking softly in the distance of the corridor.
What did they say?
Perhaps, when Grandma Mei realized that Shu Ping was about to make a move, she took the syringe from Shu Ping's hand and killed Li Zhemin herself. In this way, Shu Ping could stay out of it, pretend to be unaware, and escape legal punishment.
Or perhaps, when Mrs. Mei discovered Shu Ping, she had already given Li Zhemin the injection, so Mrs. Mei decided to take the blame for Shu Ping and voluntarily left her fingerprints on the syringe.
In either case, she was trying to protect Shu Ping.
Xiao Lou asked gently, "Aunt Mei, you and Aunt Shu Ping must have a very good relationship, right? Ruirui is the little sister you watched grow up. Is Aunt Shu Ping also like a little sister to you?"
These words touched a deep, tender spot in Grandma Mei's heart. Her lips twitched slightly, and after a moment, her eyes reddened as she said, "Xiao Ping is a pitiful person too… Back then, Li Zhemin was actually secretly dating Xiao Ping. Unexpectedly, something like that happened on her birthday, and Ruirui was innocently implicated. Her boyfriend slept with her best friend after drinking, and Xiao Ping was furious. She decisively broke up with him…"
When talking about that past event, Grandma Mei's hands trembled uncontrollably: "In order not to make Ruirui sad, Xiaoping did not tell her about her relationship with Li Zhemin. After Ruirui and Li Zhemin got married, Xiaoping went to the hospital and found out that she was also pregnant. Of course, she did not want the child. As a result, she suffered a lot of bleeding during the operation and damaged her body... The doctor told her that she could never have children again in her life."
Xiao Lou and Yu Hanjiang: "..."
Unexpectedly, Shu Ping became infertile as a result. Li Zhemin has really done a lot of harm!
Grandma Mei choked up as she said, "She later married a doctor, who often abused her. She suffered a lot during those years. Eventually, her husband died, and she adopted a daughter, which helped her recover. She devoted all her energy to her daughter, raising her with all her heart and soul, but who knew... that her daughter would actually get together with Li Zhemin's son!"
The fact that Li Mo was with her daughter was the final straw for Shu Ping.
Grandma Mei started coughing violently again. Xiao Lou reached out and gently patted her back, saying softly, "Auntie, so you think Shu Ping has had a hard time all these years, and you want to take the blame for her?"
Grandma Mei shook her head: "I did inject the insulin. If you really want to know, I'm the murderer."
Yu Hanjiang frowned slightly: "So, at 3:40 a.m., when you went to the toilet, you discovered that Shu Ping was about to kill Li Zhemin, so you took the murder weapon from her and did it yourself to prevent her from committing the serious crime of murder?"
Grandma Mei immediately corrected her seriously: " Shu Ping only handed me the syringe and insulin. She didn't kill Li Zhemin. Don't talk nonsense! I asked her for the insulin and personally injected it into Li Zhemin's body. Liu Yuming can also testify to this."
If this is true, Shu Ping can only be considered to have indirectly provided the tools for the crime. As long as she insists that she did not know that Grandma Mei would commit murder and thought that the other party borrowed insulin for her own use, then she can be cleared of guilt from the law.
Grandma Mei has made up her mind to take on everything.
Sure enough, the old lady smiled and said, " It's not worth risking your life for a scumbag like Li Zhemin. Let me do it. Anyway, this old woman won't live much longer, and I want to go see Ruirui as soon as possible."
Suppressing her heartache, Xiao Lou asked softly, "You said you don't have much time left... has it been diagnosed as some terminal illness?"
Yu Hanjiang was taken aback. He had overlooked this detail and thought that the old lady meant that she was old when she said she wouldn't live much longer.
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Grandma Mei glanced at Xiao Lou with some surprise, then nodded and said, "That's right, I'm already in the late stage of bone cancer, the same disease as Ruirui's father, and I won't live more than six months. Back then, it was I who insisted on hiring Li Zhemin into the company... Alas, this is probably karma."
Xiao Lou had mixed feelings and didn't know what to say.
Yu Hanjiang also fell silent. He had seen many murderers, but facing this elderly woman in her seventies with terminal bone cancer, he couldn't continue to coldly press her about whether she was taking the blame—so what if she was taking the blame? It was indeed her doing. From the perspectives of evidence, morality, and law, the elderly woman Mei was the one who directly caused Li Zhemin's death.
She only had six months left to live, and it was gone in the blink of an eye.
The last thing she could do was probably to take away that scumbag Li Zhemin for Shu Ping.
***
Xiao Lou personally escorted Mrs. Mei out of the office. The old lady coughed as she walked, her steps were unsteady, but her gaze was firm.
When she walked into room number 3, Shu Ping came out of the room and gently hugged her with red eyes.
Grandma Mei patted Shu Ping's shoulder with a smile, leaned close to Shu Ping's ear and said, "Xiao Ping, you need to think carefully about what you should say and what you shouldn't say... Don't forget, you still have a daughter waiting for you to take care of her. Your daughter is so outstanding, she wouldn't want her mother to become a murderer."
Shu Ping nodded, choking back tears. When she turned to look at Yu Hanjiang and Xiao Lou, the elegant and beautiful woman's face had regained its composure. She slowly said, "The last one to be investigated is me, right?"
Xiao Lou led her around to the office.
During this interrogation, Shu
Ping was surprisingly cooperative. Before Yu Hanjiang could even speak, she took the initiative to confess, "I'm sorry, I lied to you before. In fact, I never introduced my daughter to Li Zhemin's son. It was his son who pursued my Xiaomeng."
Yu Hanjiang said in a low voice, "Tell me more about what happened early this morning."
Shu Ping took a deep breath and calmly said, "At 3:10, I got up to go to the toilet. I touched my ear and found that one of my earrings was missing. I remembered that I lost it when I was eating in the restaurant that night, so I went to the restaurant to look for it. Unfortunately, the restaurant was too dark, and I couldn't find it after searching for a long time, so I went back to carriage 6. At around 3:30, Liu Yuming went to the restroom with a light. I was in the restroom opposite him at the time."
"Because I had an upset stomach, I stayed in the bathroom for about ten minutes. When I came out, I ran into Sister Mei in the hallway, who was getting up to use the bathroom. She asked me to give her the insulin and syringe I had bought, so I did."
"She turned and went back into the house. I noticed that the door to room number 2 was open, so I thought I'd steal Li Zhemin's insulin to teach him a lesson. So I took his bag and stole his insulin pen. I don't know what happened after that."
Clearly, Mrs. Mei and Shu Ping had already coordinated their statements in the early hours of the morning.
The excuse of stealing insulin in the middle of the night is too far-fetched, but if she and Grandma Mei insist on this, the police can't do anything about it. In fact, Yu Hanjiang and Xiao Lou's reasoning is more reasonable— Shu Ping committed the crime in the early morning, encountered Grandma Mei, and, feeling guilty, hid in a restaurant; then she encountered Liu Yuming, and, fearing being discovered, hid in the restroom; the third time, she finally couldn't hide and bumped into Grandma Mei.
So, Mrs. Mei snatched the syringe and insulin from her hand and took matters into her own hands.
Shu Ping had a meticulously planned crime, and using a syringe would certainly not leave her fingerprints. She could easily have said that she gave the old lady a brand new, unopened syringe.
Ultimately, only Mrs. Mei's fingerprints could be detected on the syringe.
Grandma Mei turned herself in. With a clear motive, a clear process, ample evidence, and several witnesses, the murderer in this case can only be Grandma Mei.
Xiao Lou remembered the words she had said.
It's not worth risking your life for a scumbag.
—So let me do it.
—Your daughter is so outstanding, she wouldn't want her mother to be a murderer.
Grandma Mei, Mei Ruohua, was the company's former HR manager. Back then, when other interviewers didn't give Li Zhemin high scores, she hired him because she felt that Li Zhemin was eloquent, ambitious, and a young man worth nurturing.
Unexpectedly, Li Zhemin's eloquence was actually just a glib tongue.
Li Zhemin's ambition is actually a determination to climb the social ladder by any means necessary.
Grandma Mei had always felt guilty until this trip.
She was diagnosed with late-stage bone cancer and didn't have much time left to live.
Before she died, she decided to kill Li Zhemin with her own hands.
Li Zhemin, this scourge, was initially brought about by her. In the end, she was also responsible for taking him away.