At this moment, Chen Bai suddenly realized a problem, that is, they never seemed to have thought about the source of potassium cyanide.
"Wait a minute, we seem to have forgotten a problem, that is, we seem to have forgotten to investigate the source of potassium cyanide."
Only then did everyone realize the problem. Although potassium cyanide is often used in the medical field, things like potassium cyanide are not easily available. If the three deceased people died of potassium cyanide, it means that
The murderer must have some medical knowledge.
"Yes, potassium cyanide is not so easy to obtain. I also think that the potassium cyanide that killed the three deceased people was probably made by the murderer himself."
After Song Anchun finished speaking, Chen Bai looked at the previous autopsy report in his hand. All three of them died of potassium cyanide poisoning. Wang Zhijun was previously a top student in the pharmaceutical major, so this was also the reason why Wang Zhijun was regarded as a suspect before.
"Chen Bai, look at this!"
At this time, Li Huan took out a wedding guest list and handed it to Chen Bai. Chen Bai saw that Wang Zhijun's name also appeared on the wedding of Luo Xiaoqian and Chen Jun.
"Why did Wang Zhijun appear at Luo Xiaoqian's wedding?"
Da Binzi was a little confused, but at this time Chen Bai looked at Wang Zhijun's name and fell into deep thought.
"No, Wang Zhijun must have something else that he hasn't told us. Let's go find Wang Zhijun again."
But what Chen Bai didn't expect was that when he came to Wang Zhijun's home again, Wang Zhijun was not there.
"Teacher Chen, what's going on?"
Da Binzi was a little confused. When he looked for Wang Zhijun a few times before, Wang Zhijun's performance showed no problems at all, but he didn't expect that Wang Zhijun would disappear at this time.
"Go back first!"
Chen Bai didn't say anything else, but the case has reached a deadlock now. Chen Bai and others looked at the case files in front of them with some confusion. There are no suspects in the three cases now. Although Wang Zhijun ran away, there is no evidence to prove it.
It was Wang Zhijun who killed Luo Xiaoqian and Wang Qianqian.
"Chen Bai, how should we investigate now?"
Chen Bai shook his head, he didn't know how to check now.
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"Wu Di, I want to ask you something. If you plan to use potassium cyanide to kill people, but you are afraid of being traced by the police so you can't buy a potion containing potassium cyanide, what are you going to do?"
After hearing Chen Bai's question, Wu Di put down his work and thought about it carefully before shaking his head.
"Brother, I'm a trace tester, but I don't know anything about pharmaceuticals!"
After Wu Di finished speaking, Chen Bai picked up the apple on Wu Di's table.
"Wu Di, did you know? The core of apples can extract potassium cyanide, which is highly toxic."
Wu Di was a little surprised when he heard Chen Bai's words, but after verification, he confirmed that potassium cyanide can really be extracted from the apple core.
"Chen Bai, are you saying that the murderer extracted potassium cyanide from apple cores?"
"I'm not sure, but we checked so many pharmacies on the market but found no clues at all, and the management of potassium cyanide is so strict, so the murderer probably made the potassium cyanide himself."
Wu Di thought for a while, nodded and said.
"Yes, your idea is indeed correct. If the case twenty years ago was because the management system of potassium cyanide was not strict, it would be possible for the murderer to get it. But Luo Xiaoqian and Wang Qianqian were poisoned by potassium cyanide.
Death means..."
"Chen Bai, come here quickly!"
Chen Bai was in the forensic laboratory and came out of the forensic laboratory after hearing what Li Huan said.
"What's wrong?"
"Come here first!"
When Chen Bai returned to the office, Li Huan put the information on the computer on the big screen.
"Chen Bai, actually since Luo Xiaoqian's case, I have been wondering whether we have missed something. We have always been from the perspective of the murderer, but we have not found any clues. So should we be from the perspective of the murderer?"
I wanted to see it from the perspective of the deceased, so I tried to find the connection between the three deceased people.”
Chen Bai looked at the big screen. Li Huan marked a word in red between Wang Qianqian and Wang Zhijun - uncle.
"Wang Zhijun is Wang Qianqian's uncle. Wang Zhijun has said this before. I also found out that Wang Zhijun told the truth. Wang Qianqian also worked in a bank before becoming a media person, and happened to be in the same bank as Luo Xiaoqian."
Chen Bai was a little surprised. Because he had been affected by the strange scene and the case twenty years ago, he had never thought of investigating the relationship between the deceased.
"Chen Bai, I think the key to this case is the unsolved case from twenty years ago. Only by solving that case can we know the truth about the cases of Luo Xiaoqian and Wang Qianqian."
Chen Bai nodded, but the case files from twenty years ago did not record the details of the case in detail, and apart from Wang Zhijun, the only suspect at that time was the first discoverer, Jiao Mei, who was the sister of the deceased.
"Officer, it's been more than twenty years since my sister's incident, and I can't remember many things."
When Chen Bai found Jiao Mei, Jiao Mei was making lunch, and her fifteen-year-old son was sitting at the dining table doing homework seriously.
"Xiao Nan, you go out to buy some drinks and help mom buy some star anise and cinnamon. Mom will stew meat for you in the evening."
"I know mom!"
After the boy left, Jiao Mei spoke.
"I will never forget that day in my life. My sister was the most beautiful in her life that day. We were all looking forward to the next wedding with joy, but we didn't expect that the wedding was about to start, but my sister
But I don’t know where I went. Finally, I was in the dressing room..."
After saying this, Jiao Mei couldn't continue. Chen Bai saw Jiao Mei's look and knew that she was not lying, but he still had to ask what he should ask.
"Your sister, did you offend anyone during your lifetime?"
"Police officer, my sister is a good person. She never offends anyone. Besides, she is a worker in a garment factory. Who can she offend?"
When he came out of Jiao Mei's house, Chen Bai was a little disappointed because after some questioning, he didn't get any clues.
"Teacher Chen, I have an idea."
"If we go to visit the police who were handling the case at the time, we can't go empty-handed. We have to buy something."
Of course Chen Bai knew what Feng Qianqian was thinking. In fact, he had long wanted to go to the police who handled the case, but Chen Bai had concerns. After all, for the police, unsolved cases will always become a knot in their hearts.
, it’s definitely not okay to interrupt rashly.
"Consultant Chen, why do you have time to come to us?"
Because the person in charge of the case at that time was the Development Zone Criminal Investigation Detachment, and the policeman in charge of the case has not yet retired, so Chen Bai came directly with the things.
"Nothing, just passing by to see you."
The person who greeted Chen Bai was Chen Bai's college classmate. This person and Chen Bai were in the same dormitory at the time. Although they didn't have much contact after graduation, they were not strangers.
"No, you brought so many things, how could you just come and see us? Tell me! What's the matter?"
"Okay, since that's the case, I won't beat around the bush. Is Officer Luo here? I have something to ask him!"
Luo Feng, born in 1965, was officially recognized as a people's policeman in 1985. He has been thirty-eight years now. He has handled numerous major cases in his life. He is now nearly sixty years old and is now the captain of the criminal investigation detachment.
.
"Consultant Chen, please take a seat."
Chen Bai and Feng Qianqian sat down. Luo Feng personally made a cup of tea for them. Looking at the heat rising in the tea cup, Chen Bai didn't know what to say for a moment.
"Consultant Chen, actually I knew what you were here for when I saw you."
Luo Feng was not a fool. When he saw Chen Bai finding him, he knew what was going on.
"Officer Luo, since that's the case, I won't beat around the bush. Do you still remember the wedding case twenty years ago?"
Hearing Chen Bai mention the wedding case, Luo Feng's face suddenly darkened.
"That case was the shadow of my life. My master and I were a little surprised when we saw the case. We had never seen such a case before."
Chen Bai nodded, and Luo Feng stood up and took out a file bag from the table.
"Chen Bai, look at this!"
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Chen Bai took the file bag in his hand and opened it and found that it contained the confessions of Wang Zhijun and several people at that time.
"This is our confession at the time. You can take a look at this."
Chen Bai looked at the confessions in front of him. In fact, they were similar to what he knew and were of no use to the case.
"Captain Luo, do you have any other clues you can provide us?"
Luo Feng shook his head and said helplessly.
"No, you also know that we were not developed at that time, so we didn't understand many things very well. Over the years, I haven't thought about this case for a day, and wanted to know what is going on in this case, but I really can't figure it out."
"Captain Luo, I want to ask you, why did you position Wang Zhijun and Jiao Mei as the first suspects at that time?"
Luo Feng took a sip of tea and continued.
"Actually, there are no more important clues. It's because Wang Zhijun was a pharmaceutical major before, and Jiao Mei was the first discoverer. We checked the things at the scene and found many people's footprints, but who was also in the dressing room at that time?
All can be used, so we can’t determine which one is the murderer’s footprints.”
Chen Bai nodded, and Luo Feng continued as if he remembered something.
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"Actually, there is another point. At that time, Wang Zhijun was studying the use of potassium cyanide to remove rust, because the sewer pipes used in our houses at that time were all made of iron. However, this research was no longer carried out after Wang Zhijun's wife died.
"
"So, Wang Zhijun had the opportunity to come into contact with the potassium cyanide test product at that time, right?"
Chen Bai was a little surprised. Although he had thought that the management might not be very strict at that time, he did not expect it to be so lax.
"Yes, the situations you mentioned are possible, so this is why Wang Zhijun was listed as the first suspect at that time. But at that time, Wang Zhijun was accompanied by someone from the beginning of the wedding until the bride's body was found.
Wang Zhijun has an alibi. The reason why Jiao Mei is regarded as a suspect is not only because Jiao Mei is the first discoverer, but also because the soles of Jiao Mei's shoes have red paint, and the inverted five-pointed star found at the scene
The pattern is made with red paint."
Chen Bai nodded, but these evidences were not convincing.
"Captain Luo, I looked at the case file and found that apart from the time and place of the crime, there is only a brief introduction to the case. Are there any details of the case that you did not write down?"
In fact, after Chen Bai carefully read the case file, he already had doubts. This case file from twenty years ago lacked too many important clues, not even the detection process of the case, which made Chen Bai
I'm a little confused. Why is such an important thing not written in the case file?
"Consultant Chen, in fact, when we were investigating this case, there was a saying among the people that the bride was controlled by a mysterious force, so she would do such a thing. Of course, in our opinion, this is
It's nonsense, but no matter how much we investigate, we can't find out who the murderer of this case is, and in the end we have nothing to find out."
"To be able to paint such a big five-pointed star on site, there must be brushes and paint buckets. Didn't you look for these?"
Luo Feng shook his head and smiled bitterly.
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"Of course we did. We found these in the trash can behind the hotel, but there were no fingerprints on them. Although there were surveillance cameras at that time, most of them were on the road, and there were no places like hotels."
"Okay, since Captain Luo bothered you, let's take our leave now."
Chen Bai knew that there was no point in writing any more. Luo Feng stood up and walked Chen Bai to the door. When he was about to get in the car, Luo Feng pulled Chen Bai.
"Consultant Chen, if possible, I hope you can tell me the results after solving the case. I really want to know what happened to the case twenty years ago."
"good!"
On the way back, Chen Bai kept thinking about the common points of these three cases. There was a more or less relationship between the three deceased people, the same scene and the same way of death.
"Hello?"
While Chen Bai was lost in thought, Da Binzi called.
"Teacher Chen, I visited the address where Wang Zhijun lived back then. Some old neighbors here still have impressions of Wang Zhijun's affairs. Would you like to come and take a look?"
"Okay, you wait for me."
Chen Bai didn't have any ideas now, so he just wanted to see what those old neighbors had to say.
"Teacher Chen, this is Grandma Qi. She was Wang Zhijun's neighbor back then and also attended Wang Zhijun's wedding."
"Auntie, do you still remember what happened back then?"
The old man looked to be in his eighties. Sitting on the wicker chair next to him was his great-grandson.
"Young man, I can't forget what happened twenty years ago! Zhijun is a good boy, the young man is young and promising, and the little girl is also a nice person. I introduced them both. I remember that was in 1999
spring..."
The old man was like this, he talked endlessly, but Chen Bai was not in a hurry and just sat next to the old man and listened quietly.
"Having said that, that little girl has been chatting away ever since she got together with Zhijun. She has stopped working at the newspaper office and spends all day reading at home with a bunch of books. I've seen her a few times, and she always
I couldn't understand some English books. But actually, it was nothing to read. But one time I saw this girl lying on the floor at home from the window, with a circle of candles around her, and she was lying in the middle with a book in her arms.
What is it for? Young man, I don’t know if what I said is right, but in my opinion, you are possessed by evil spirits."
Chen Bai nodded and continued to ask.
"Mom, does Wang Zhijun know about this?"
"I know, why don't I know? I don't mind it because I told Zhijun about it, but Zhijun didn't really care."
Chen Bai nodded and continued to ask.
"Then when you attended the wedding, did you notice anything strange?"
"Yes, that's already been said."
The old man said, sat up slightly and continued.
"According to common sense, why does the groom have to go to pick up the bride? But Wang Zhijun's wife didn't, and she went to the hotel by herself. After arriving at the hotel, she locked herself in the dressing room alone. Of course, there are so many things going on at the wedding.
We can’t always take care of everything, but when the time came, Zhijun’s daughter-in-law couldn’t be found. We searched all over the place but couldn’t find it. Finally, the bride’s sister found it, but she found it..."
Chen Bai could see that even after so many years, this incident was a huge blow to the old man.
"We were all panicked at the time. I was brave enough to take a look at the scene. Young man, I tell you, I immediately remembered the scene of the woman lying on the ground at home, surrounding herself with a circle of candles."
"Grandma Qi, didn't you just tell me that you have photos of the wedding? Can you find them and show them to us?"
After Da Binzi finished speaking, the old man patted his head and quickly stood up and walked towards the house.
"Yes, yes, I told you just now, but I forgot about it."
As he spoke, the old man took out a thick photo album from the bookshelf, flipped through a few pages and pointed to one of the photos.
"Yes, this is it. This is the photo we took at that time. We also realized that the bride was not there after we took the photo. You see, this is me, this is my son, and this is the woman's sister."
Chen Bai took a casual look at it, but it was this glance that made Chen Bai see some clues, because at this time a child in the photo caught Chen Bai's attention.
"Mom, do you know whose family this child belongs to?"
The old man put on his spectacles and looked carefully at the person pointed by Chen Bai.
"I seem to have some impression, wait a minute! You asked me to think about it, and by the way, I remembered that this is Chen Jun, the grandson of the old Chen family!"
After the old man finished speaking, Chen Bai and Da Binzi looked at each other at the same time. They did not expect that Chen Jun was also at the scene of the case twenty years ago.
"Then do you know who else is in their family now?"
"Oh, I haven't contacted you for many years and I can't remember. We were neighbors at the time, but it seems that they moved away after Zhijun's incident happened."