Wu Duan didn't bother to express his surprise, "What did you find?" ”

Yan Sixian went down to the first floor of the dormitory building, but did not come out in a hurry, but checked the door lock used in the dormitory on the first floor.

This floor is the farthest away from the fire and the closest to the escape gate, so students are relatively calm when escaping, and many dormitories have locked their doors.

After looking at a few door locks with Yan Sixian, Wu Duan also made a discovery.

"It's different! The door lock issued by the school is one size larger than this lock. Wu Duan said, "This is a student who bought it privately!" Tomorrow, we will start a visit to all shops within 5 kilometers of the school that may sell this kind of lock, including locksmith stalls, hardware stores, and supermarkets. ”

After speaking, Wu Duan pondered for a moment, and then said, "I don't understand...... It doesn't make sense......"

He scratched his head and said to Yan Sixian: "You help me analyze and analyze."

First of all, let's lock the door, the murderer deliberately bought a lock, I can understand this behavior, the lock of the 617 dormitory must have been taken into the house, and the murderer is not bad at using the lock of his dormitory - then a little check will reveal the stuff - so she specially bought a lock.

However, in this way, the whole process of arson and locking the door was premeditated in advance.

So the question is, how did the murderer set the fire right under the noses of the two deceased? I don't understand, how is arson done? ”

Yan Sixian said: "At this time, it's time to try the hourglass analysis method. ”

"Hourglass analysis?"

"Haven't heard of it?"

Wu Duan shook his head, "No, is that some advanced theory?" ”

"No," Yan Sixian smiled, "I invented it myself, but I was addicted to all kinds of hourglasses during that time, so I took such a name." To put it simply, it is the psychological analysis of the murderer based on the modus operandi in the absence of evidence. ”

Wu Duan couldn't stand this kind of theoretical thing the most, and his head was big when he heard the proper noun, "To put it bluntly, it's hard analysis." ”

"Uh...... It seems that there is nothing wrong with this understanding," Yan Sixian no longer paid attention to Wu Duan's interruption, and continued: "You mentioned the subjective intentionality of the murderer, then let's use it as a starting point.

First, let's look at the two things separately from the fire and the locking of the door.

Let's start with locking the door, you just mentioned that locking the door is intentional, right?

I agree with this that locking the door, which requires a person's 'active operation', must be intentional, and it is not like a fire.

It is possible that the fire was deliberately set on fire, or it is possible – as the fire alarm suggests that it was accidentally ignited.

Let's start with deliberate arson, as you said, two deceased people who were drunk, but set fires right under their noses – that doesn't make sense.

So either the arson method was particularly ingenious and avoided the attention of the two, or the two drunkards caught fire after drinking. ”

Wu Duansi walked around the corner and said, "What you said is equivalent to not saying it, isn't there only these two possibilities?" ”

"Don't worry, the important analysis is yet to come." Yan Sixian said: "What I want to say is that I am more inclined to the former possibility. ”

"Intentional arson?"

"That's right, and I've already locked up the suspect."

"Who?"

"Peng Yitong."

"Really? I see you've been talking to her for less than 10 minutes. ”

Maybe it's luck, Peng Yitong said a lot of how poor she is, how she is bullied, and how she wants to find a stable job.

I wasn't originally a person with a lot of sympathy, but I thought she was a motivated girl, so I asked a few more questions.

I asked her if she had anything to lose, and guess how she answered?

She said, 'Maybe a few hundred,' and I asked her how many hundred, and she said, 'About three hundred.'" ”

Wu Duan also found a problem, "If she is really poor, how much cash she puts in the dormitory and what valuables she has, it should be clear, not ambiguous." ”

"Haha, you also found out," Yan Sixian snapped his fingers, "I think she is a typical herd mentality and can't lie." ”

"Conformity?"

"Peng Yitong set fire, she will definitely take all the gold and silver with her before leaving the dormitory to avoid losses - the long-term overstretched life affects her behavior, and she is afraid of losing money.

But when I asked her about her loss, subconsciously she knew that with such a big fire, everyone who suffered would inevitably have losses, and if her loss here was too small, or even no loss, it would be different and easy to arouse our thoughts. At this point, she wants to conform to the herd.

For the murderer, conformity is a good kind of concealment, a drop of water falls into the sea, but it cannot be found.

It's a pity that she was too hasty, she didn't think about how to lie, and the two improvised questions and answers made her exposed. ”

Wu Duan opened his mouth.

"Stop!" Yan Sixian said: "Don't emphasize to me that there is no evidence, I am all based on psychological speculation." ”

Wu Duan said helplessly: "I didn't want to say that. ”

"Oh." Yan Sixian raised his eyebrows.

"I want to say that people in the same dormitory do have more convenient arson conditions, you suspect Peng Yitong, I don't object, but Peng Yitong's situation is a bit special.

When I asked one of their other roommates, I also asked about the relationship between several people in the dorm.

Li Nana and Li Shuang's personalities are a little more domineering, but judging from Li Nana's ability to gather a group of followers, she is still a little prestigious, and she disdains to bully the two jujubes in her dormitory, on the contrary, she is still more protective of the people in the dormitory outside.

Yes, Peng Yitong's family conditions are not good, and sometimes he is verbally ridiculed by Li Nana and them, but if you really want to say how bad their relationship is, it may not be, that classmate gave two examples.

First, during the exam, Li Nana copied Peng Yitong's every time she took the exam, and sometimes bought snacks for Peng Yitong after copying, which can be regarded as a reward.

Second, Peng Yitong lost the money again, and Li Na lent it to her.

If you want to say that Peng Yitong has a motive for committing the crime......" Wu Duan shook his head, "I don't think it's appropriate." ”

Yan Sixian smiled, "That's even more interesting, obviously in the eyes of others, there is no contradiction between Peng Yitong and the two deceased, why is she in a hurry to admit it?" ”

Yan Sixian was silent for a while and continued: "In my opinion, it is because of fear and years of grudges that will be released at one time. ”

"Scared?"

"It's the same as the herd behavior just mentioned, the murderer is afraid of being discovered after committing the crime, so they will speculate on the thoughts of the police in turn.

For example, Li Nana's ridicule of Peng Yitong is likely to be told by classmates. Rather than being told by others, it is better for her to admit it generously, not only to show that she 'did not do anything bad and is justified', but also to observe our attitude towards this matter by the way.

It was her reaction out of fear of being suspected.

As for the release of many years of grudges, think about it, I obviously hate being ridiculed and teased, but I still have to endure it and maintain peace on the surface, but it is not a lot of grudges, and things must be reversed, and now that the person who bullied her is dead, she no longer has to endure it, and she will have a kind of 'I wish to tell the world' psychology of disgust for Li Nana and Li Shuang. ”

"I hope you're right, but I also hope you're not." Wu Duandao.

"Oh? Why? ”

"If you say it right, you can solve the case quickly, but if you really say it right—you're too scary, I doubt you can read minds?"

"Don't say it, I really will, like now, I know you must be thinking about supper."

Wu Duan rolled his eyes, "Of course you know, my stomach has been screaming for a long time, like a band." ”