The police found that the deceased had suffered from bipolar disorder three years ago, but based on her psychiatrist's records, together with the drugs found at the scene of the crime, it is certain that the deceased did not take the medicine on time.

Therefore, Sister Xi suspected that the deceased probably chose to commit suicide in a state of mental abnormality.

Just when the police thought they could close the case by suicide, the woman's brother Ruda suddenly came to the police station. After learning the news of his sister's death, he was in a hurry.

He said he had been doing business abroad, so he rarely saw his sister. When Lao Ji asked him about his sister's condition, he didn't know anything, but he just said that he was too busy with business and cared too little about his sister.

After the inquiry, Lao Ji felt that the relationship between the two brothers and sisters was very strange, as the deceased's own brother, how could he not even know about the deceased's suicide. And when I learned it, I just looked sad, but in fact I didn't care about my sister at all.

And Lao Ji even noticed that during the interrogation just now, there was always a person who remarked Insurance Chen calling him. Judging from Ruda's veiled expression just now, it seems that he is deliberately avoiding the police to know something.

Therefore, Lao Ji thought that this Luda must be hiding something, so he immediately asked Xiao He to investigate whether he had purchased any insurance recently.

Unexpectedly, on the way to the investigation, a piece of clothing suddenly fell on Xiao He's head, and just as he wanted to scold, he saw a woman standing on the top floor ready to jump down.

Seeing this, Xiao He immediately ran upstairs, and at this time the woman seemed to be very happy, still dancing on it with clothes in her hand, and just when she was about to jump down, Xiao He arrived in time to pull her down, and then sent her directly to the hospital.

After returning to the police station, the police immediately investigated the woman and found that the woman's name was Cheng Yao. According to Xiao He's performance on the roof of the building, she initially guessed that this person should have taken some kind of hallucinogenic drug, but the specific cause still needs to be tested for blood testing.

However, to the surprise of the police, she actually worked in the same bank as the deceased Li Ying, and after questioning the bank's colleagues, it was learned that Cheng Yao usually had no bad habits.

However, at lunch today, she suddenly said that she was very hot and wanted to go to the rooftop to breathe, but she didn't expect to almost lose her life this time.

After hearing this, Lao Ji suspected that there should be something wrong with Cheng Yao's lunch, so he immediately asked the identification department to test the leftover bread and juice she ate. As a result, in the salmon sauce in the middle of the bread, the ingredients of the M-magic drug were detected.

At this moment, the hospital also came with the news that Cheng Yao had woken up, so Lao Ji immediately rushed over.

The police asked her why she was going to the rooftop today, but she had no memory of what had happened before. Then Xiao He told her about the detection of M phantom medicine in the bread sauce, but she was also very shocked after hearing it, and said that it was the first time she bought this bread sauce, so she didn't know why there was M magic medicine in it.

At this time, Lao Ji noticed that Cheng Yao's grandmother suddenly became nervous unconsciously when she heard that there was M magic medicine in the bread sauce. Lao Ji felt that she might know something, so when he took advantage of his grandmother's time to wash the fruit, he quietly found out that Cheng Yao actually had a secret boyfriend, and the bread sauce was given by her boyfriend.

After returning to the police station, the police analyzed the case, and according to the investigation, it was learned that the bread sauce that Cheng Yao accidentally ate was imported and is not currently sold in China. However, not long ago, a trading company became his exclusive agent, and the owner of this company happened to be the brother of the deceased Li Ying, Ruda.

In addition, Cheng Yao and Li Ying are good friends, Lao Ji guessed whether Cheng Yao's boyfriend would be Luda, and Cheng Yao pretended not to know the source of the salmon sauce, it was obvious that she was deliberately concealing it. Or maybe Cheng Yao didn't know that this salmon was stuffed. She also deliberately concealed that Ruda was the agent of this salmon, and she didn't want people to know that on the day Li Ying had an accident, she ate the sandwich she made with this salmon sauce.

Generally, after taking M Phantom Medicine, it will amplify sensory perception. Normal people will feel extremely happy after using it, but if a person with bipolar disorder like Li Ying takes it, it will not only make the mood more depressed, but even produce unconscious suicidal behavior.

In this way, this is likely to be the cause of Li Ying's suicide. In addition, the police also investigated that Li Ying's brother Luda has owed a lot of debts outside in recent years. Not long ago, he deliberately upgraded his sister's large insurance, and since he came back from abroad, he has been applying for his sister's death certificate to prepare for compensation.

Thinking of this, Lao Ji applied for a new autopsy on Li Ying's body, and after testing, psilocybin residue was detected in her hair. This also proves that Li Ying has indeed taken M Phantom Medicine, and it has been at least five months.

Later, the police also went to Cheng Yao's house and took the uneaten bottle of bread sauce to the police station, and after testing, it was confirmed that it was the same ingredient as the psilocybin residue in Li Ying's body.

Now that the evidence is conclusive, the police immediately brought Cheng Yao and Luda back to the police station, and Lao Ji planned to let the two meet in the corridor, but he didn't expect Luda to walk over directly when he saw Cheng Yao. It seems that she doesn't know each other at all, but Cheng Yao is different, she was obviously stunned when she saw Luda.

When Lao Ji saw this scene, he decided to start with Cheng Yao first, and Lao Ji directly suspected that she and Luda partnered to drug Li Ying.

Cheng Yao immediately broke off the relationship with Luda when she heard this, she said that those bread sauces were indeed given to her by Luda, and it was Luda who asked her to give the sandwiches with ingredients to Li Ying for breakfast.

She also said that the one who wanted Li Ying to die the most was Ruda, because Luda thought that his sick sister had always been a burden, and the threat of creditors to him, so he planned to sacrifice this sister in exchange for a new life.

On the other side, Luda knew that Cheng Yao confessed himself, so he no longer concealed it, and he directly and generously admitted that he gave his sister the medicine at that time. He watched his sister being tortured by the illness and thought that it was better to die directly. He said that he originally wanted her to die unknowingly, so that he could make more money, but he didn't expect the police to see through his plan and put himself in.