Liu Yefang nodded and didn't say anything more, and now that there is nothing to do, let me bring the polygraph and go to the interrogation room.

I thought it was another test of those people from yesterday, so I asked and found out that the senior sister was planning to try Li Chao and Feng Haojie first, she hadn't used this thing many times, and she felt very rusty, so I thought about them to test it.

The person who tested first was Li Chao, and I took the person to the interrogation room, and I connected some instruments on the tester to Li Chao's body according to the book, and checked it again and again, and only after finding that it was correct, did I signal that the senior sister had done it.

"You put on the headphones, I'll ask a question, and you see if he answers badly."

After Liu Yefang finished speaking, he turned to look at Li Chao, the question was extracted from what he said, during the twenty-minute questioning, I didn't hear any alarm from the polygraph, so I nodded to her at the end, indicating that everything was normal.

Soon Feng Haojie was also brought in, and he had the first operation experience, this time I quickly got the preparations, and after ten minutes, the result was the same this time.

After Feng Haojie was taken out, Liu Yefang looked at me and asked, "How do you feel?" Is it difficult? ”

I smiled and said, "It's okay, I've been exposed to this thing before, and it's not too complicated." ”

"That's okay, listen carefully, if the man who died this morning is a cat, the person behind the scenes must be among these three people."

It's still yesterday's order.,After the first person came in, I quickly got my work ready.,Senior sister started to ask questions.。

At the beginning, it was very smooth, but in the seventh question, Liu Yefang asked what means of transportation to take back on the night of the incident, and after the person answered, the polygraph suddenly launched an alarm, I did not say anything, and after writing down the question, the question continued, and no alarm was issued in the future.

When Liu Yefang motioned for me to finish asking the question, I took off my headphones and handed her the paper with the alarm question, she took it and swept her eyes and frowned, but she didn't say it either. And let the police officer who was on the side come in with the next person.

During the test on the second person, when the same question was asked, the siren went off again, and after the test was over, I showed the results to the senior sister, who only glanced at her and did not speak.

Because the third person has died, during the third test, it was the fourth person who was brought up, and after the people sat down, before I was ready, I heard the senior sister say directly: "The two people in front have already confessed, you are the murderer, do you have anything to say?" ”

I turned my eyes to the man, I didn't have much ill feeling for him, and during the two days of interrogation, he was very cooperative and did not show impatience.

I saw that he was stunned, and then raised his voice and shouted: "Impossible! I'm not killing anyone, they're messing around! ”

"If you kill someone or not, put on a lie detector and try it to know, don't say that we have wronged you when the time comes."

Although I didn't understand what kind of medicine was sold in the senior sister's gourd, why did he suddenly say that he was a murderer, anyway, she must have her reasons, I just got what I should do, get the equipment of the instrument ready, and I put on the headphones to signal that it was ready.

Liu Yefang began to ask questions, this time the question was completely different from the previous one, I don't know if it was because of the previous stimulation, this time when he answered the first few questions, the lie detector was calling the police the whole time. After answering six questions, the polygraph stopped alarming, and unlike the previous two, it did not sound the alarm when asked how to return to the residence.

I recorded all the issues that raised the alarm and handed them to Liu Yefang at the end of the interrogation.

"When you answered my question, the siren went off six times, can you explain what's going on?"

Facing Liu Yefang's question, the man replied anxiously: "Comrade policeman, it's really not the person I killed, if the person I kill is thundering in the sky, it will not be a good death." ”

Liu Yefang laughed and said, "If there is thunder one day, what is the use of us policemen?" ”

Without waiting for the man to speak, she followed up and asked, "The man who died this morning is your accomplice, do you know the secret of his death?" ”

Seeing the change of topic, the man's mood relaxed a little, shook his head and said, "I really don't know this, I happened to be queuing up to eat, and when I found out about the movement, I saw that the person had fallen to the ground and couldn't get up." ”

Liu Yefang didn't look at him, lowered his head and said to himself: "Don't you have a sense of crisis?" Maybe you'll be the next to die, don't forget that you came in together, we just focused on that person yesterday, and that person died this morning, if you focus on you today, guess you'll live for a few days? ”

The man's face changed a few times, and after a few seconds, he looked like a deflated ball, shrugged his head and whispered: "Actually, I do know something about his death, but I just don't know if it's true." ”

When I heard this, I suddenly came to my senses, and there was really an inside story in this, so I pricked up my ears and prepared to listen to the following content, suddenly Liu Yefang kicked me, and motioned for me to put on the headphones, just wear them, anyway, you can hear them if you put them on.

"Tell me, you know what's hidden, if you tell it, I promise you will go back as you did yesterday, and nothing will happen."

The man nodded, looked around and saw no one around, and then said in a low voice: "I heard that the murderer deliberately provoked him, and then the two had an argument, and without arguing, the murderer raised the bench and smashed it on his head without warning, which finally caused him to burp." ”

Liu Yefang looked at me, I shook my head to indicate that the lie detector had no alarm, and she asked suspiciously: "Intentional provocation?" Are you sure? ”

"Then do you know Zhang Hanyang, has that murderer been in contact with anyone before?"

The man thought for a few seconds, shook his head and said he didn't know: "I don't know about this, when I go back to the class room, it's a chase shop, the murderer and we are not in the same room, I don't know his situation, except for the time when we eat, we can contact the prisoners in other rooms, and the police are watching the rest of the time, even if you talk loudly." ”

"Xiao Xu, is there monitoring in the detention center's canteen?"

I've been here for more than a month, and I've been to the detention center a few times, but I haven't seen any cameras, so I said, "I don't think so, the houses over there were built a long time ago, and the facilities are not so advanced." ”

Liu Yefang retracted her gaze in disappointment, and after writing down the situation, she asked again: "You said that you are not the murderer, then which of the three of you do you say is most likely to be the murderer?" ”