Ji Feng didn't understand where Jian Jing's depression came from, nor did he understand why she was so heartbroken.

"Isn't it just a pair of shoes?" He said perfunctorily, "Come and watch the surveillance."

Jian Jing: "Send me a copy."

Ji Feng's intuitive radar was activated. He didn't dare to touch the thorns at this time, so he quickly sent a copy. As a result, his own video was just opened, and hers was also sent: "Your network is very fast."

"The school has 5G." Jian Jing looked down at her phone with an indifferent face.

It must be said that the police are efficient. With so many surveillance cameras in the school, they have accurately found the suspect's clips.

Cheng Jiayou is naturally needless to say, Wang's roommate and Zhang's best friend are also there.

Let's review the statements of several people: Wang's roommate returned to the dormitory after the interview, Zhang's girlfriend accompanied the deceased to the interview and left on her own, Zhao Xuan, President Fang, and Liu Kai returned to the student union office after dinner.

The layout of the school is that the lake is in the center, one end is the teaching building, and the other end is the dormitory area, which is roughly as follows.

.........Gate.............

..........................

Teaching Building...Library...Administrative Building..Teaching

Building...Lake........Experimental Building..Teaching

Building...Moor................

Teaching Building..............Gymnasium

..............Dormitory Area......Sports Field..

....................Hall......

From the route, it is not unusual for Wang and Zhang to appear by the lake. Jian Jing

carefully compared them and found that Wang's roommate appeared at the entrance of the milk tea shop, across the street from the lake, while Zhang's best friend was closer, not far from the lake.

Drag the progress bar and you can see that Wang's roommate once walked to the trash can and threw away a bunch of tissues - she just bought a grilled sausage in the milk tea shop.

After seeing the deceased fall into the water, Zhang's best friend once rushed to the lake anxiously.

But this is meaningless, there are more than just these few opportunities to destroy evidence. If the murderer is careful enough, he should clean up after poisoning, and not wait until the crime is committed.

Jian Jing said: "It is most likely that we can't find it."

"Even if there is only a one percent probability, we still have to find it." Ji Feng taught her, "Don't think the criminal is too smart. Many times, people are panicked and can do stupid things. However, this is our job and has nothing to do with you."

Jian Jing raised her eyebrows: "Then what does it have to do with me?"

"Let's analyze it. Everyone has time to commit the crime, and everyone has the opportunity to destroy physical evidence. Therefore, to find a breakthrough, we have to investigate from two aspects." Ji Feng raised his finger, "The source of the poison and the motive for the murder. We will investigate the former, and the latter..."

Jian Jing frowned.

After a while, he asked, "Has anyone mentioned me to you?"

Ji Feng raised his thumb to praise her understanding: "The little girl named Zhang."

But Jian Jing was not happy: "I'm not good at this kind of thing."

"Teacher Jian, this is called psychological warfare." Ji Feng encouraged strongly, "It's a waste of time to try each case separately. Your school also requires us to solve the case as soon as possible to avoid panic. In extraordinary times, extraordinary methods must be used. I absolutely believe in your potential."

At this point, Jian Jing had no choice but to nod: "I understand, okay."

The two walked around the lake and returned to the principal's office. The others had already taken very detailed notes.

There was nothing wrong.

Ji Feng winked at Jian Jing. She took a deep breath, cultivated her acting skills, walked up to Zhang's girlfriend, and grabbed her collar: "I have a conflict with Jin Meixian, huh?"

This "huh" was completely imitating the tone of the domineering CEO in the idol drama, cold, disdainful, and condescending. Of course, it would have been more courageous to slap her directly before, but Jian Jing couldn't bring herself to do it, so she had to imitate the posture of a little gangster on the street.

- This was learned from the little gangsters in Jiang Baiyan's crew.

Zhang was stunned for a moment, with a little panic in her eyes: "I'm telling the truth."

"What truth?" Jian Jing sneered, "Tell me about it."

Zhang's face turned red, and she stammered: "I, I also heard it from Meixian."

Jian Jing was a little surprised that she was obedient, and took advantage of the victory to press on: "Oh?"

Zhang didn't want to admit it, but she was used to being a follower, and she couldn't be tough with Jin Meixian. Compared with the arrogant Jin Meixian, Jian Jing's momentum was not weaker but stronger, and she was murderous. She wilted all of a sudden: "She said...you are shameless...or something, she wants to teach you a lesson...I was just telling the truth."

Jian Jing recalled the conflict this morning. Zhang probably didn't lie, Jin Meixian just had an opinion about her.

This is very interesting.

She and Cheng Jiayou just had some interactions in September, and they haven't spoken a word since then. How did Jin Meixian get the information about her?

His eyes turned to Zhao Xuan. She didn't dodge or avoid him, and she had no shame. Then he looked at Liu Kai next to him... He avoided his sight like a dodge, which vividly explained the meaning of "sly eyebrows and rat eyes".

"It's you." Jian Jing understood everything and stared at him. "You hate what happened on the hiking day, and deliberately whispered something in Jin Meixian's ear. Why, with your position in the student union, you can't move me, so you want to use Jin Meixian's knife to kill people? Let me guess, you want to get rid of my place in the postgraduate entrance examination?"

How much power can students have? It's nothing more than a small piece of land in the school. Ji Feng hinted that Jin Meixian's family is well-off, which puts a lot of pressure on the school, forcing them to solve the case as soon as possible.

Liu Kai wanted to get her, and the best way was to kill someone with a borrowed knife.

Jin Meixian was proud, naive to put it nicely, and naive to put it bluntly. If he heard that she and Cheng Jiayou were having an affair, it would be strange if he didn't take action.

Only in this way could he explain her "exam" remarks made in the morning.

Jian Jing thought she was showing off at the time, but now thinking about it, it was clearly a threat.

"You are quite brave." Jian Jing said calmly, "This afternoon, I heard you asking about Jin Meixian's internship. Did you go to her company?"

She looked at Cheng Jiayou and said, "Your brother is trying to steal your company, but you don't suspect anything?"

Liu Kai was shocked and scared. He didn't expect her to figure out the whole story so quickly, nor did he expect her to splash dirty water so quickly and accurately. He blurted out, "Don't talk nonsense."

The job Jin Meixian introduced was about to fail, and he still had to cling to his "brother".

Cheng Jiayou was a little confused.

But he was not a bad person by nature, and would not maliciously speculate about his brothers. He hesitated and said, "It was all a misunderstanding." However, Liu Kai did not make it clear whether the bad words were a misunderstanding or the corner was a misunderstanding. Obviously, he was also confused.

However, Jian Jing did not intend to give up easily.

She did not do this to vent her anger, but did it on purpose.

Judging from the current confession, Wang's roommate had a grudge against the deceased, but it seemed to be just an emotional aversion, without a clear interest. Zhao, Liu, Fang, and Zhang did not have much to do with the deceased. It seemed that they were just accidentally involved in the case and could not find a clue.

This is a very tricky situation for the police. They must find evidence before they can continue to interrogate the suspect. At the current efficiency, it will take at least two or three days.

Ji Feng wants to try another way.

Just like the game of prisoner's dilemma, sometimes people know that a win-win situation is the best way, but they always make unwise choices for various reasons.

He just told Jian Jing that Zhang's best friend had reported the case, which was just a hint for her.

Just like in Werewolf, when someone accuses you, you must refute it while also putting the blame on others. Attacking is the best helper.

In the mutual accusation, pulling out the radish will bring out the mud, and the secrets hidden by others can be dug out.

So, at this moment, the truth is not important, what is important is the fight.

Jian Jing lied with her eyes open: "Does Jin Meixian have an autographed photo of a singer named Fan?"

"How do you know?" Cheng Jiayou was confused.

Jian Jing pointed at Liu Kai: "Is the wristband he uses the brand endorsed by that singer?"

Before anyone else could look over, Liu Kai quickly covered his wrist.

Cheng Jiayou didn't believe that his long-time friend had anything to do with his girlfriend, but this... "Liu Kai?" He was stunned.

"Jiayou, listen to my explanation." Liu Kai said quickly: "Mei, she wanted his autographed photo, and I happened to buy this brand of wristbands, and I won the autographed photo, so I gave it to her."

Jian Jing stabbed faintly: "You didn't use this brand before."

Shortly after she got the intermediate card, her observation ability made her remember everyone's characteristics: Liu Kai used a very expensive brand at the time, he deliberately showed off, often stretched out his arms vaguely, and Zuo Xin even complained about his pretense.

Cheng Jiayou lived in the same dormitory with him, so naturally he knew more than Jian Jing: "You just changed this recently."

Liu Kai had no words to say. He bought and returned nearly ten times, opened three vests, and repeatedly bought this wristband. It was indeed to use the singer's photo to please Jin Meixian.

But this was all for finding an internship.

He is not crazy, how can he like a lady like Jin Meixian.

"Have you ever had anything to do with Jin Meixian?" Jian Jing smiled, giving him a taste of his own medicine.

Liu Kai is a mean person, and mean people usually choose to sell out others to save themselves when they are in danger. He bit out another person without hesitation: "Bullshit, if you really want to say who has this idea, it should be you, the president?"

He thought clearly that Cheng Jiayou and Jin Meixian could help him find a good job, and the president's position seemed to be one level higher, but in fact the power was not much greater, not to mention that he was about to graduate, and the student union president was useless.

Good buddy and useless president, you know who to offend.

"I saw you pull her to a corner to talk before," Liu Kai is a good dog, good at biting people, "Is it because you were chasing her, she didn't like you, you couldn't get her, you were angry and killed her directly."

Others: The melon smells so good.

President Fang didn't expect to be bitten suddenly, and was flustered for a moment, but quickly calmed down: "I have a little crush on her, but after they got together, I never thought about anything else. I just made it clear that day, but I didn't expect you to misunderstand."

He held his glasses and said casually: "I am a boy, I am more open-minded, but Zhao Xuan, I also advised you to give up, but unfortunately you didn't listen."

Jian Jing sighed in amazement, a real villain, a hypocritical gentleman, no wonder Cheng Jiayou is still okay, all thanks to the support of his peers.

Zhao Xuan sneered: "President, just say what you want to say. Why are you making innuendos?"

"I just said it casually. I don't mean anything else." President Fang smiled. "Everyone knows it anyway."

"Honestly, you make me sick." Zhao Xuan couldn't bear it anymore. "Why, just because I like Cheng Jiayou, I would kill someone for him? Are you crazy or am I crazy? Does he deserve it?" When

people are pushed into a corner, they can still diss the person they liked before, not to mention that now the white moonlight has faded, and is just a grain of white rice that sticks to clothes.

"I have found a good internship a long time ago, and my leader gave me a formal salary during the probation period. Although the boss's son is uneducated, he is rich enough and is pursuing me." She felt disgusted as if a fly had fallen into a dish. "Am I crazy? Killing someone for Cheng Jiayou? I am crazy."

Cheng Jiayou was very embarrassed. It sounded like he was a beauty. He hurriedly said, "Stop arguing. Zhao Xuan and I are just friends. We are classmates. How could we kill someone for such a small thing?"

Zhao Xuan did not appreciate it.

She had given up on Cheng Jiayou for two months and her feelings for him had faded. Now, because of him, she was involved in a scandal. Even though she knew it had nothing to do with him, she couldn't help but get angry emotionally: "Let me put it bluntly. Now we are here fighting like dogs. It's either because of Jin Meixian or because of you, Cheng Jiayou, but you - are you really not a suspect?"

Cheng Jiayou was extremely surprised and asked, "Why would I kill my girlfriend?"

"You had a fight the night before last." Zhao Xuan said calmly, "I'm sorry, I didn't mean to eavesdrop, but you had a fierce fight, didn't you?"