Shortly after the task force received the appraisal report from the Provincial Cultural Relics Appraisal Center, the drug residue inspection report from the Provincial Evidence Inspection Center was also sent.

The two samples a and b submitted by your organization were tested by our center using conventional microbiological, chemical and physical testing methods and a professional GC-MS detection system. No currently known poisons, anesthetics and psychotropic substances were found.

Drug residue.

After seeing this test report, Su Le felt extremely depressed. If no drug residue was detected in Liang Yinghong's body, Su Le might have accepted it easily. But there was no drug residue found in Liang Shi's body, which made Su Le feel sad.

Le felt it was unacceptable. Judging from Liang Shi's behavior after drinking and suspected murder, he was obviously given some kind of drowsiness drug. Otherwise, no one would be so thoughtful as to fall asleep soundly at the murder scene, and after the police arrived,

Still couldn't wake him up.

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Su Le returned to the office alone and saw the cigarettes on the table. He took out one and put it in his mouth. After lighting the lighter, he smiled bitterly and threw the cigarette into the trash can. He

He sank into the sofa and held his face in his hands, trying to calm down. At this moment, the cell phone in his pocket suddenly rang.

After a long while, Su Le took out his mobile phone to watch. The message from He Xiaohui was displayed on the screen.

"Detective, how is the work going? When will you come back to see your mother-in-law?"

After seeing this message from He Xiaohui, Su Le suddenly had an idea. He didn't bother to reply to He Xiaohui's message, but dialed Dr. Qiao's number:

"Dr. Qiao, what are you busy with?"

"Hahaha, Su Le, are you making a mistake? It was clearly your sister who sent you the message just now, why did you call your brother-in-law?" Dr. Qiao's teasing voice came from the phone.

"Oh, you guys are together." Su Le said awkwardly.

"Su Le, I sent you a message and you didn't reply. Are you looking for a fight?" He Xiaohui said loudly from the side.

"Hey, I'm not busy right now." Su Le sighed.

"Oh, it seems that our great detective has encountered a problem. Tell me, sister, and I will teach you two tricks." He Xiaohui said.

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"You can spare it. I'll go find Dr. Qiao."

"Haha, Su Le, some people will be unhappy if you say this." Dr. Qiao said.

"Hey, don't make trouble, I really have something to ask you."

"Okay, tell me." Dr. Qiao changed his tone.

"We took two samples of human excrement and sent them to the Provincial Evidence Testing Center for drug residue testing, but the result was nothing. However, we inferred from the suspect's condition at the time that he might have been drugged.

Sex is great.”

"This situation is normal. The types of drugs and medicines currently included in our database are limited. The evidence center has not detected drug residues. It does not mean that there are no drug residues at all. Maybe the criminals are using a new type of drug.

Medicine, this medicine has not been included in our database."

"Then what should we do in this situation?"

"Did the Evidence Center do GC-MS analysis?"

"It seems to have been done."

"That's easy to handle. You can give them the mass spectra of the two samples in the full scan state. I'll study them first, and then I'll talk to my colleagues abroad to see if I can find any clues."

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"Ah, that's great. Fortunately, Captain He sent me a message, otherwise I wouldn't be able to remember you, a great doctor."

"Haha, it seems that my status in your heart is still not as good as that of He Dian. You can only think of me through her. It seems that I will become her appendage in this life."

"Isn't this what you dream of, hahaha." After Su Le hung up the phone, his mood immediately brightened. He decided to talk to Liang Yinghong again to see how he could find a breakthrough point in the case.

"Ms. Liang, please carefully recall what happened on the night of the 25th. The more detailed the better."

"Well, okay. I remember that night I worked overtime at the company for a while and read a few documents. At 7 o'clock, a friend of mine called me and asked me if I had eaten, and then we made an appointment to have dinner together.

.”

"What time did you leave the company?"

"It was probably around 7:15. The company's monitoring system should have records."

"What time did you arrive at the hotel? What time did you leave?"

"It takes about 15-20 minutes to drive from the company, and we probably arrived around 7:30. Then we had dinner together. When I left, I remembered to look at my watch and it was 9:45. I went back later.

It should be a little after 10 o'clock when we get home."

"What did you do when you got home?"

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"When I got home, the security guard at the door opened the door for me. I asked him if Liang Shi had come back. The security guard told me that he hadn't come back yet. I think Liang Shi has always had a good drinking capacity. He might go out to drink.

I would be back quite late, so I didn’t care, parked the car and went into the house.”

"What about after entering the house?"

"After entering the house, I saw two security guards on the first floor standing at the door. I said hello to them and went straight upstairs. After entering the door on the second floor, I thought that Aunt Yan was not here today, so I thought

Go back to the door and lock it."

"Did you make sure you locked the door at that time?"

"Yes, I confirm. In the past two days, I have carefully recalled the scene at that time, and I did lock the door."

"Okay, then what?"

"I took a bath first, and then went to the study to read for a while. At half past eleven, I made a glass of honey water in the study, and then drank while reading. After reading for a while, I felt sleepy, so I drank the rest of the book.

I drank up the honey water and went to the bedroom to go to bed."

"Did you hear anything in the middle of the night?"

"No, I slept very deeply that day, and I didn't wake up until 9 o'clock the next morning. When I woke up, my head was still a little heavy, as if I hadn't woken up. At that time, I thought, it's not good to sleep too much.

Sleep less and you will feel better."

"How do you usually sleep?"

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"I usually don't sleep very well, especially recently. A lot of things have happened. I often have nightmares when I go to bed at night. Sometimes I wake up in the middle of the night and can't fall back to sleep again."

"Okay, about the door on the second floor, do you know who has the key?"

"I don't have the key to that door. That door can be locked by hand from the inside. The key was arranged by Liang Shi. As far as I know, Liang Shi and Aunt Yan have the key."

"Do you think someone would have entered the second floor after you locked the door from the inside that night?"

"Well, that's probably not the case. All the windows on the second floor are locked with wire mesh, and there is no entrance or exit on the roof. The two people with keys were not at home that day."

"Then how do you make calls on your cell phone?"

"I don't know. I confirmed that I didn't make any calls. In the past few days, I haven't been able to figure out why, except that my phone was poisoned and controlled remotely."

"Later, we tested your phone again, and we still found no records of the phone being poisoned or remotely controlled."

"Could it be that they erased the manipulation records?"

"It's impossible. I have repeatedly confirmed this with the technical staff."

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"Oh, I really can't argue with this matter!" Liang Yinghong helplessly covered her face with her hands and didn't say a word for a long time.

"I want to ask you a question." Su Le said.

Liang Yinghong put down her hands, looked at Su Le with her red and swollen eyes and said:

"go ahead."

"If you choose one between Liang Shi and Aunt Yan, who do you think is more likely to harm you?"

"How is this possible for the two of them?"

"Why?"

"Aunt Yan was born in our family, just like her own family. Liang Shi and I have the same grandfather, there is no way he could harm me."

"What if I have to choose between these two people?"

Liang Yinghong thought for a long time, shook her head and said:

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"I have no choice. None of them can harm me."

"Okay, I won't dwell on this issue anymore. Let's talk about that pack of facial tissues. When do you usually use that kind of facial tissue?"

"I'm used to putting one or two packs of facial tissue in my bag for emergencies when I go out."

“Would you use this kind of facial tissue at home or at work?”

"No, there are paper towels everywhere at home and at work."

"Who has access to your handbag at home or at work?"
To be continued...