In psychology, there is a term called the threshold effect, also known as the inch-in-the-inch effect, which refers to the fact that once a person accepts a trivial request from others, in order to avoid cognitive dissonance, or want to give others the impression of being consistent, he may accept a larger request. This phenomenon is like climbing step by step when climbing the threshold, so that it is easier and smoother to climb to the heights. This itself is an important term in marketing psychology, but in social effects, this psychology also exists in other aspects.

Psychologists believe that in general, people are reluctant to accept higher and more difficult requirements, on the contrary, people are willing to accept smaller, easier to complete requirements, and only after the smaller requirements have been realized, people slowly accept the larger requirements. Obviously, Bai Yiping was in this state of mind at that time, and she was not enough to really kill people right away. However, she can go and see how others kill people first. This curiosity made her watch the film and television drama video of the bathroom murder.

Then, this curiosity had sparked her desire to continue climbing the stairs, and she wanted to know more, so she began to look for information.

Then, when she thoroughly understood the entire crime process, and even saw some comments on the Internet, some ideas and improvements to the method, her inner desire was even stronger!

I don't know if I am not in the middle, Bai Yiping has already walked from downstairs to upstairs and climbed the threshold of the crime ladder!

"That is to say, no one taught you to use atropine to make Tang Tianli drowsy, and no one taught you how to kill people in the bathroom, all of this is what you heard from others, and then you became interested in it, and only learned about it after you learned about it?"

Bai Yiping continued to nod.

It's weird, it's weird! In just a few days, someone told Bai Yiping about the use of atropine and the case of killing people in the bathroom, which seems to be too much of a coincidence, right?

No way, there must be something wrong with this.

"Then how do you explain that you must go to the City of Joy Washing Feet that day, and besides, there happened to be a hostage-taking incident, so you have the perfect time witness!"

"At that time, I was busy with work, and many sisters said that they wanted to relax, I originally wanted to relax, and when I planned to kill Tang Tianli, I also thought about how to create time doubts, and there is no doubt that it is the best way to wash my feet and let many people see me. At the same time, I often wash my feet, and as a member, it is a matter of course, and it is not easy to make people suspicious. ”

Hum, for a moment, it was as if my mind had been emptied. When Bai Yiping recounted these things, the guilt and memories she showed were completely true, so what she said was correct.

"Let her repeat what she just said." Townsend shouted in my headset.

Examining lies, retelling is a good way, I frowned, and let Bai Yiping describe it again. And when she repeated the words just now, there were indeed a few confusions, but the content and time points expressed were the same!

"She really didn't lie, she thought of all this and carried it out by herself!"

"Is there really no one behind it?" Townsend questioned.

At that moment, the air fell silent. After Bai Yiping finished narrating, her body had gradually relaxed. Because, she didn't need to hide the secret, so, at that moment, she was relaxed. She killed Tang Tianli, this is already an irreparable situation.

"If you are given another chance, will you still kill Tang Tianli!"

Bai Yiping's eyes looked at the desktop, her tears were flickering, and she shook her head with a very slow movement! Her eyes are looking down to the right, and her lips are pursed as she shakes her head! The eyes are recalled to the lower right through the image memory area of the right brain, and the pursing of the lips is a manifestation of self-inhibition, and this micro-expression shows that at this moment, Bai Yiping's heart is rational.

And after coming to her senses, her answer is no! Therefore, her killing Tang Tianli was actually a kind of passion inducement! Who made her lose her reason, and who made her passionate?

"Who's that guy?"

Bai Yiping was a little puzzled, she said inexplicably: "I said, it's me, I don't know who you're talking about?" ”

"How did he do it?"

"I don't know what you're talking about?"

Bai Yiping was already confused, because, at this moment, I was actually talking to myself. From beginning to end, Bai Yiping was very honest, and she didn't lie, but sometimes, even if she didn't lie, some information points would be covered up.

The door was pushed open. When Townsend heard me talking to himself through the headset, he knew I was out of the cross-examination. The police came in and took Bai Yiping away. And before they could go out, I said to Tang Jishui: "Director, from beginning to end, Bai Yiping didn't lie, she didn't interfere with the case." ”

"But when you asked her who she was, she didn't say anything!" Tang Jishui is unknown.

I shook my head: "Because, she doesn't know who it is, or rather, in a sense, she's also a victim." ”

Victim! When these three words came out of my mouth, the scene was completely enveloped by a strange and unbelievable sense of doubt. And especially Bai Yiping, when she was characterized as a victim with three words, she couldn't suppress the sadness in her heart again, and cried loudly.

"I regret it, I really regret it, if I had left Tang Tianli earlier, if I hadn't coveted his money, I wouldn't have fallen to such a state at all." A sense of weakness and hysteria made Bai Yiping's legs limply to the ground.

In this world, there is no regret medicine! If there is, then regret is not called regret!

With the help of the police, she left the inquiry room.

Now, it seems that it is time to close the case, because the murder case of Tang Tianli has been closed, and the poisoning case has also been recognized as a prank, but even Tang Jishui and Tang Minyun, they did not say that they would close the case for the first time, because, from the faces of several people in our office, they can see that the problem has not been completely solved.

Tang Jishui asked: "You still insist, there is a driving force behind the scenes?" ”

Tang Sen nodded: "At this point, I support Ryoko, my intuition, and all the information that has been sorted out now, makes me have to suspect that there are bigger fish that have not been dug up." ”

"Of course, Tang Tie's matter hasn't been solved yet." Tang Minyun said, "Director, do you still want to report the progress of the case to the top, or, how to report it?" ”

Tang Jishui looked at us, took a cigarette out of his arms, lit it and took a deep breath, he smiled, "What do you say?" ”

Tang Minyun pursed his lips: "The above is urgent, if you don't report it, I'm afraid that you will be criticized." ”

"Criticism, ha, Minyun, don't think so fiercely about the top bosses of our system, they are in a hurry to let me report, because they are afraid that public opinion will be hyped up, which will be unfavorable to the public security system, and will also make social gossip run around. It's just that since we let Townsend help us solve the case, we should give them the greatest support, and now they say that there are still big fish behind the scenes, so we should give them time to find out the big fish. I have decided not to report it for the time being, and if I want to criticize it, I will explain. ”

"We appreciate the kindness of the director. I don't think we're going to let you delay for long. ”

"Do you have an idea?" Townsend asked.

I didn't reply right away, I just let everyone follow me out of the interrogation room. Later, I asked Tang Minyun to help us find out the relevant parties involved in the pesticide poisoning incident that Bai Yiping said, and also summarized the information of other waiters in the Wanshihao Hotel.

In addition, I also need Qian Xiaoai's usual social network!

These things are messy and complicated, obviously, all of us can't rest, but when Tang Sen saw my insistence, he naturally knew that I must have a clue, and I didn't say it now, I'm afraid I haven't completely organized my thoughts.

In addition to Xie Lei, who was still keeping an eye on Qian Xiaoai, the four people in the office, plus Tang Minyun, and even Tang Jishui sent other people from the police station to assist us in summarizing all the information. I need them to identify the intersections of these people's networks, and we need to try to find the similarities between these people.

"The current summary of information shows that Qian Xiaoai, Bai Yiping and even Tang Tie, their intersection is really relatively small, in addition to living and working in Tangjia Village, other similarities that can be found, we can only summarize them to eat and buy vegetables, or the places they usually walk. I'm dizzy, Brother Liang, what the hell are you looking for from us? Xu Jiaqi lay a large pile of materials on the table speechlessly.

Over there, Tang Lin also shrugged his shoulders helplessly: "Brother Liang, we really can't find any similarities." ”

"I can't even find anyone from your office, and it's difficult for us policemen who know Tangjia Village very well to generalize, isn't this a bit of a mistake." Tang Minyun has seen our analytical ability, so her words are more of a discussion.

Of course, these people have been looking for clues, and only one person has been idle, and that is me. I know that some of them must have said that I was deliberately lazy, but those who know me know that I watch them busy, and in fact, it is easier for me to organize a lot of information points in my mind, like now, every action they make, every word they say, is actually a stimulus to me.

"I can't find much of a similarity, that's right."

"What!" When I said that, everyone looked at me in amazement.

Xu Jiaqi couldn't help but laugh and said, "Brother Liang, you are playing us." ”

"I'm not fooling you, I just want to make sure of one thing, that is, these three people really don't have much in common. If there are too many similarities, but the idea that I thought of at the beginning is not valid, but now, because you policemen who are very familiar with Tangjiacun and Xu Jiaqi, who is very proficient in information aggregation, cannot find similarities, then it completely shows that my idea may be very correct. ”

"What's that train of thought!"

In an instant, the police of the Tangjia Village Police Station and everyone in the office looked at me together! The goal, not far away!