After returning to school, I told Yang Yang and the others about today's experience, and the three of them were shocked after listening to it.

Ziming said: "If you really poison the coffee, you and Ma Chao will definitely be suspected tomorrow, after all, Zhao Yiming is sure that the two of you took her coffee, so even if you adjust the package for her, it is possible." ”

"How do you speak, Ziming!" Sister Meng Yao reprimanded him.

Ziming stuck out his tongue and said, "I just want Zhou Wen to be mentally prepared." ”

Yang Yang also looked very worried after hearing this, and asked me: "If the police ask you tomorrow, have you thought about what to say?"

"Didn't think about it. I replied honestly, "And I also think that the poison is in those three bags of coffee, otherwise she wouldn't have had such a reaction after drinking coffee at noon." But the problem is that the technical team usually doesn't lock the door, she said that there were several bags when she drank it on Wednesday, so the murderer should have moved his hands and feet within 24 hours from yesterday morning to this morning, and Ma Chao and I were in the factory where she went before today, so what I want to say is also within this time period of the crime. ”

Sister Meng Yao thought for a while, and then asked me, "When you went to work today, did you take the subway?"

"Sit down. I replied.

Sister Meng Yao said: "There are security checks when you enter the station, and the things they scan every day should be recorded, as long as that can prove that you don't have coffee, plus you didn't go to the unit yesterday, you can prove your innocence." ”

"But it's not ruled out that he put the coffee on him?" Ziming interjected.

"There are cameras everywhere on the platform, and you can tune up the video to see what the security personnel have taken out when they scanned him, and if there was coffee, he would have taken it out to see it. ”

"You're a genius. Ziming did not hesitate to praise Sister Meng Yao.

Yang Yang also smiled and said to me, "Great, Zhou Wen!

I knew they were all planning for my safety, but ever since I saw the police officer holding the coffee bag in his hand, a strange feeling lingered in my mind.

Early on Friday morning, I went to the Public Security Bureau, and after several inquiries, I finally found Qiu Bin, who was indeed the captain of the criminal investigation team. Captain Qiu took me to the office, and I saw that Liu Jia and a few other masters who had made an appointment to come this morning to take notes were also there. After Qiu Bin waited for all of us to arrive, he cleared his throat and said: "After yesterday's overnight investigation, we confirmed that the deceased Zhao Yiming was poisoned to death, and the murderer mixed the poison into the bag of coffee she drank. Hearing him say this, my head suddenly "buzzed".

Then Qiu Bin took out three sealed bags from behind him, which contained three coffee bags that had been torn apart, "These three bags of torn coffee were drunk by the victim yesterday, and we all detected poison residues in the bags, so the murderer should have split the poison and mixed it into these three bags of coffee, and the victim died of poison after drinking these three bags of coffee." We speculate that the murderer first took away all the bags of coffee that the victim originally stored in the drawer, and then replaced it with adulterated coffee for himself, and it is said that the coffee in the drawer had not been touched when the victim drank coffee on Wednesday morning, so the time when the murderer mixed the coffee should have been between half past nine in the morning on Wednesday and nine in the morning yesterday. ”

"What kind of poison is it?" asked Master Feng. Last night was the night shift of Class A, and Master Feng came directly to the second floor to hold a squad leader meeting after going to work, so he was also at the scene when Zhao Yiming died.

"The scientific name of the poison is tetramethylenedisulfonetetramine, which is rat poison, but this kind of thing is rarely available on the market now. Qiu Bin replied to him.

"It turned out to be rat poisoning. "It was the leader of class B who spoke, he was on the day shift yesterday, so he also went to the class leader meeting in the afternoon, and then we began to whisper among our group again.

"Does that mean that as long as she doesn't drink these three bags of coffee in one day, she won't be poisoned?" asked Liu Jia as if she had plucked up a lot of courage.

"After all, it is a poison, and the poison is still very lethal to rat poison, if you look at the concentration of residual poison in each bag of coffee, the poisoning will still be poisoned, but it should not be fatal. Qiu Bin replied.

Therefore, the person who poisoned not only knew what brand of coffee Zhao Yiming usually drank, but also knew that if she only kept three bags of coffee, she would drink it all in one day. "I looked at Qiu Bin and wanted to ask for a confirmation of the truth of this statement.

"It is not ruled out that the murderer may not have wanted to kill her, but he didn't expect the deceased to drink all three bags of coffee in one day, but I think this possibility is very low, because the murderer took all the other coffee, so he should have gone for the goal of killing. Hearing Qiu Bin say his reasoning so calmly, we all shuddered.

"So are we here to take notes today or to provide our alibi?" I asked, looking at Qiu Bin. His reasoning is basically consistent with my speculation with Ziming last night, so the suspect should be that in addition to the people we were in the conference room yesterday, all the people who came up to the second floor on Wednesday's day shift and night shift plus Thursday's day shift are also suspicious.

"It can also be said that we will use your records to determine whether you have a motive for committing the crime and a chance to poison you. ”

"Shouldn't the suspects be just a few of us in the conference room yesterday?" asked Liu Jia.

"That's right. Qiu Bin replied, "We have identified all the people who went up to the second floor during the period from Wednesday morning to Thursday morning through the access to your surveillance video yesterday, and there are indeed a few other people in addition to the people who were at the scene of the crime yesterday, and our team has arranged for someone to go to them today to make a record." ”

"Wait a minute, does that mean that as long as you didn't go up to the second floor during the poisoning time you just mentioned, you won't be suspicious? Then I only went up yesterday afternoon when we had a meeting. The class leader of class B said. According to him, he didn't come to the unit on Wednesday with a break, and came to work on the day shift on Thursday, but he didn't go to the second floor during the day, and only went up before the meeting in the afternoon, first smoking with Liu Jianhua and several other squad leaders in Liu Jianhua's office, and then went to the conference room when it was time for the meeting, and the coffee had already been transferred at that time, so he was not suspicious.

"Yes, we have confirmed what you said through the video, but since you were at the scene when the deceased died of poison, your testimony is also very important, and I ask you to cooperate. Qiu Bin still said something that is irrefutable.