Ma Liang thought for a moment.

"When we arrived at the theater, the concert had not yet ended, we were taken backstage by the security guards, and a person in charge received me and asked me several times, what did Xu Qingquan do?

I said that we can't disclose the facts of the case, but at present, the deceased is only related to Xu Qingquan, and he is considered a girlfriend, and I want to find him in a hurry to go back for an examination and rule out suspicion.

Hearing me say this, he didn't seem to be so nervous at first, and then nodded and walked out, when the door was closed, I listened to him shouting in the intercom, let the cello be substituted, don't make a mistake in the last one, replace Xu Qingquan, someone is looking for him.

I thought, this is not a good performance, we waited for a while, they went to look for it, only to find that Xu Qingquan was chatting with someone about something, telling us our identity, Xu Qingquan remembered this stubble, he said that he forgot, just thinking about the performance.

He said that he has been nervous recently, and he has a serious headache due to hair loss, and his memory is not very good, in front of us, he took painkillers, I remember that it seemed to be Fenbid, and then asked us what we were looking for him, we said what we wanted, but he was not irritable and resistant.

I was just very surprised, and I asked Li Li carefully about the process of the accident, there was no such grief for the loss of a lover, as if I knew that an acquaintance had an accident, and then I was a little embarrassed, that's all, and then we went to the provincial department for sampling.

Waiting for the result, I hurriedly drove back with him, Xu Qingquan sat in the middle of the back row, I sat on the left side of the back row, and he sat on the right, all the way to the point There was no embarrassment, but when something happened, it was a matter of a moment.

I slept a little dazed, I felt the lights dazzling, as soon as I opened my eyes, the car spun, I could only do my best to press Xu Qingquan's head and hands under my armpits, and then I didn't know anything. ”

It seemed that Zhou Ning was recording, and inside the speaker, there was a sound of rustling.

"He said headaches, hair loss, memory loss, nervousness, right?"

"Yes, okay, give the phone to Lao He, I'm done asking, you guys take care of it, don't be in a hurry to be discharged from the hospital, and we'll go to see you after these days."

Ma Liang was a little embarrassed, quickly waved his hand, and handed the phone to He Shancun.

"Director Zhou, don't be so polite, if we weren't cautious, we wouldn't be in such a big mess, you guys are busy with the case, I know what kind of busy you have been these days, you talk."

He Shancun took the mobile phone, turned off the speaker, waved his hand at a few people, walked out of the ward quickly, and walked into the safe passage, then asked in a low voice.

"Tell me, what else do you have to explain?"

"Hehe, aren't you also quite interested, let me ask you how you can tell if it's vitamin A poisoning in addition to a blood test?"

"It's good to ask like this earlier, do a lumbar puncture, check the pressure of cerebrospinal fluid, this is the most intuitive examination, his hair loss, headache, memory loss, mental tension, these are indeed like vitamin A poisoning, but if you have similar cases before, it is naturally easier to judge, but I think it is the fastest to do a lumbar puncture."

Zhou Ning exhaled, and suddenly had confidence.

"Then do it, you said this method, it is not suitable for our autopsy, tell me the results after the examination, this test, I want to see the concentration of various substances in it, especially impurities, if this is the same, then it may be the same person poisoned."

He Shancun snorted twice.

"Okay, get out, call you, I'll arrange work for me, every day it's either your hospitalization, or a colleague's car accident, and if you don't want to be your Baidu, it's really annoying."

Zhou Ning hung up the phone and rubbed his nose, and Liu Yongxin laughed on the side.

"Lao He's attitude is not bad, although he said unforgiving words, but people didn't delay you, but according to what he said, you can distinguish by doing lumbar puncture, so the speed of judgment can also be improved."

Zhou Ning nodded.

"I asked people to go downstairs and wait for the blood sample, and then talk to Sister Cui, I think she will be interested, after all, the more samples, the easier it is to find the problem."

Liu Yongxin sat on the sofa and crossed Erlang's legs.

"Don't be worried, you are in a hurry now, it is useless at all, first, the inspection has to wait; second, Peng Shinian couldn't ask about the progress there; Third, it also takes time to investigate Zhang Fangfang and Liu Meiling, don't be impatient! ”

Zhou Ning got up and looked out the window, he knew that he was impatient, and sighed.

"I know I'm impatient, but Master, I always have a feeling that Li Li, Zhang Fangfang, and Liu Meiling must have some secrets, after all, the drama of three classmates and a man is too uncommon for ordinary people to accept, but they seem to be enjoying it."

Of course, Zhou Ning still had a doubt, which lingered in Zhou Ning's heart.

But there is no evidence to support it at all, and it is inconvenient to say it, just like the headless serial murder case in Hai'an City, which has been around for the first time in 19 years, Zhou Ning always feels that there may be some past between these three people and Xu Qingquan, but they have not found it for the time being.

September 4, 2013

Early in the morning, outside the laboratory door.

Zhou Ning crossed his arms and looked at the curfew at the door of the laboratory.

"He hasn't come out in the past few days?"

Da Zhao nodded.

"There is a post-it note posted on the door, which says that three meals are placed at the door, don't knock on the door, the door control has been reset by him, Xiaoqu has not been opened, if there is no bathroom and bathroom in the laboratory, I would have asked people to come and break it, and every day there is garbage from the previous day at the door, but it's been three days, should we go in or not?"

People who are engaged in research are persistent, Zhou Ning knows very well, don't look at Xiaoqu is very cooperative with their work, but when I was in school, it was not like this at all, when I talked to him, I would reply with a few sentences if I liked to listen to it or was interested, otherwise I would treat you as air.

But this thing has been in retreat for three days, and I'm really a little worried, if nothing else comes out, people are driven crazy, which outweighs the losses, and I can't explain it to Li Chengbin.

Zhou Ning raised his hand and was about to open his mouth to say that when he banged on the door, the door was opened, and Peng Shinian stood at the door with a stubbled beard.

Swiped it with his access card, Didi made a chaotic sound, Peng Shinian pulled his hair and said:

"Okay, the curfew is back to normal, you can come in."

Xiaoqu pushed away the person in front of him, squeezed to the front, looked at the access control and looked at Peng Shinian, with surprise and doubt on his face.

"What did you do? I haven't even unlocked it, what are you setting up? ”

Peng Shinian smiled, and on his dirty face, he was stunned to launch several pleats.

"It turned out that when I was in the laboratory, I learned from their R&D programmers that my card was set as the main card, but if I swiped the card in reverse, nothing could be opened here, not even the person who designed the software, because the password was set to scroll."

Da Zhao waved his hand and pushed Xiaoqu away.

"I said, poet, are you in retreat, boy? The door is closed and we won't let in, and you've made yourself like a landmine, what the hell did you get out? ”

Peng Shinian was just about to speak, glanced at Zhou Ning, and then sniffed on himself, the smell almost sent him away, and he couldn't help retching.

"I'll go take a shower and change my clothes, you guys come in first, and I'll tell you in detail in a moment."

A bunch of people, looking at each other, walked into the lab without nonsense.

Da Zhao glanced at the room, covered his mouth and nose, called Sun Gaotie, and quickly opened all the windows of the laboratory, of course, the door here was also opened, ventilated for a while, and the smell dissipated.

Ten minutes later, Peng Shinian came out, shaved, although his hair was wet, but it looked much normal, seeing Zhou Ning looking at him, Peng Shinian was a little embarrassed, and hurriedly ran to Zhou Ning.

Holding the remote control, turn on the display, and several pictures keep showing on it, and it looks like there are a little orange traces on the black background.

Although I don't know what it is, it seems that I have made a discovery if I can let Peng Shinian study it for three days.

"In the past two days, I have compared a lot of things, and what interests me the most is this thing, which was found in the gap between Xu Qingquan's shoes, and in the gap between the wheels of his trolley box, as well as the outside of the cake box, these particles or pollen were also found.

After detailed analysis and comparison of various components, I found that this is a very distinctive local plant in Qindao, called Qindao copper hammer grass, which is an annual herb of the genus Hyssop in the Asteraceae family, with white flower tongues and the largest yellow part in the middle of the stamen.

After the flowering, this stamen will be preserved until the whole plant withers, this plant likes light, drought tolerant, does not choose the soil, but is extremely afraid of water, often grows on the sunny slopes without shrubs, the mountains around Qindao are mostly stone mountains, the root system of this plant is not very developed, can not grow.

Therefore, their distribution area is very limited, mostly not high slopes, sunny places, where there is less human activity, their leaves are sharp and serrate, and if you don't pay attention to it, you will cut people, so the distribution range I give is less than the area on this map. ”

Da Zhao coughed, he understood it, this Peng Shinian already had an idea, but it was related to the discipline he studied, and he always wanted to argue or something, how could he have this time now.

"Don't talk about the theory, just talk about the results, where do you think it can appear."

Peng Shinian pursed his lips, and when he saw that Zhou Ning was also looking at him, he hurriedly said:

"According to the growing season of Qindao Copper Hammer Grass, it will bloom from May to September, and it is inaccessible, the soil is soft and gentle, and there is little water in the sun, I think the cemetery is the most suitable."

Da Zhao thought about it, took out his phone, and glanced at the date of the lunar calendar on it.

"August 21st is the Midyear Festival, we Qindao people generally go to worship on the 14th day of the seventh month of the lunar calendar, or the 15th day of the seventh month, of course, the time is not convenient two days in advance, at this time there is a great chance of encountering the copper hammer grass, I remember Xu Qingquan's parents, are also gone, right?"

Xiaoqu glanced at Peng Shinian at this time and showed the notebook to Da Zhao and Zhou Ning.

"Last night, the poet asked me to help check it, the cemetery of the Xu family's parents is in Jingkou District, and it is an extremely high-end kind of double tomb, and I checked the monitoring of the Huanwan Expressway and the undersea tunnel, and I didn't see any traces of the Xu family's sisters and brothers."

Da Zhao's eyes widened.

"They didn't go to the cemetery, so who went"