Hearing Liang Ying's explanation, Zou Cheng said: "You mean, the person who committed the crime must be in this room and connected to the computer. ”

"So this is a close-range invasion, not a long-distance invasion?" Mr. Zou said.

Liang Ying nodded and said, "Yes." ”

And Zou Cheng looked up at the camera in this room, which had been twisted to the other side.

Liang Yingqi also glanced at it and said: "This camera can be moved, it should be someone who hacked the system, so that the camera will not rotate, and can only stay at such an angle where nothing can be seen." ”

Now the judgment is that Liang Yingqi thinks that someone has come in, but the police who went to investigate found that no one has seen any suspicious people come in.

Zou Cheng thought for a moment and said: "There is no sign of forcible entry into this room, the doors are locked, and the pass identifier is not damaged, the target should be an internal ghost." ”

Liang Ying said: "It is very likely. ”

"I need the park to share with me, and I want to take a look at the amusement park's security locks and check the records of the previous two. Liang Ying said.

Zou Cheng asked people to contact the people in the park, and soon Liang Yingqi was on his computer and began to check.

"I'm now turning out the access control room for the roller coaster control room. Liang Ying said.

As soon as Liang Ying's cry came out, Zou Cheng noticed that something was wrong, Zou Cheng said: "At 2:53 in the afternoon, there are actually seventeen different employees in one minute, and they want to swipe their cards to enter the control room?"

Zou Cheng felt strange, is this possible?

Liang Yingqi said: "The security server is very clean, and the records have not been tampered with, so there were indeed seventeen cards that wanted to swipe this door at that time. ”

Zou Cheng looked at the platform outside, and he said: "Such a small place, seventeen people, it is difficult to stand here, don't say that we will brush it up together." ”

"There was only one person with seventeen cards who wanted to swipe open this door, and there were a lot of wrong records, not the right card, not opening the door at all. ”

Zou Cheng's words made Liang Ying look at the computer screen and say, "The seventeenth long card is successful." ”

"It's understandable that one card is wrong, but seventeen cards are wrong and you're trying to find a way to break in. That's what we're aiming for, he's guessing, he doesn't know which employee card will open the door, so he's been trying until he succeeds. Zou Cheng felt that he could already imagine the scene at that time.

The murderer came with a lot of cards, but he didn't know what cards could open the door in front of him, so he kept trying, and on the seventeenth time, he succeeded.

A police officer next to him, hearing Zou Cheng and Liang Ying's words, came out and said: "Although this is possible, we investigated the people in the park, and they said that no employee's card was lost or stolen. ”

Faced with the policeman's question, Liang Yingcries said: "He doesn't need to steal the real card, he just needs to steal carefully, it's a very old-fashioned stealing behavior." ”

"How many staff entrances are there to the amusement park?" asked Liang Ying.

"There are two, each with a pass reader. The officer said.

Hearing the officer's words, Liang Ying nodded and said, "Our goal is to modify the identifier to steal the employee's information, he obtains the information on the virtual device, and then makes his own card, which explains why no one said that the card was stolen." ”

Hearing Liang Ying's words, Zou Cheng said: "It seems that our opponent is a computer master. ”

Liang Ying nodded and said, "It should be." ”

Zou Cheng said to Liang Ying: "Security system, continue to turn forward and see if there is anything suspicious in front." ”

Liang Ying nodded and began to check, and suddenly Liang Ying said to Zou Cheng: "I found it, a week ago, there was a card that was swiped five times in a row, and I wanted to enter the control room, but I was denied entry every time." ”

Hearing Liang Ying's words, Zou Cheng was a little puzzled, a week ago.

Zou Cheng said: "Employees know in their hearts which door their card can open and which door they can't, why do some people want to swipe it five times?"

Liang Yingqi said: "I found out, he is a former employee who has left the company, and he probably wants to see if the card can still be used." ”

"Expelled?" asked Zou Cheng.

Liang Yingqi said: "It is very likely, and his identity shows that he used to be in the amusement park and was an engineer." ”

Engineer?

Hearing the three words of the engineer, Zou Cheng said: "He is eligible, and he is fired, and he may also hold a grudge." ”

"Yes. Liang Ying's eyes lit up, thinking that maybe they had already found the murderer.

"If he's an engineer, it's easy for him to do that. Liang Ying said.

"Can you see a picture of him?" asked Zou Cheng to the people in the park.

Liang Ying cried and said: "No, you can watch it directly." ”

Liang Ying's fingers quickly flew on the keyboard, and then a photo appeared, Liang Yingqi looked at the person in the photo, and then looked at Zou Cheng.

Zou Cheng was also stunned, he looked at the photo, and then immediately called the police station.

"Is the person who went to the police station looking for the ring still there?" Zou Cheng asked the police officer on the phone.

"I've already given him the ring, and I'm ready to sign it and leave. The officer said.

"Don't let him go, stop him, he's under serious suspicion right now. Zou Cheng said.

As soon as the police officer heard Zou Cheng's words, he immediately stopped that person in the police station.

Zou Cheng didn't expect that this photo was actually the man who was looking for the ring just now, the man who had died of his girlfriend.

"We should go back and interrogate him. Zou Cheng said to Liang Ying.

Liang Yingcries carried the computer on her back and followed Zou Cheng back to the police station, they were going to meet the man now.

After coming to the police station, the police officer came up and said, "Inspector Zou, the person has been locked up, but he is in a very bad mood now." ”

Zou Cheng nodded, and took Liang Yingqi in, Liang Yingqi took out the notebook that Zhu Ting handed her from her bag, and she was about to start the work of recording.

"Why did you arrest me?" the man shouted restlessly when he saw Zou Cheng and them coming in.

"Did you hack the roller coaster's control machine?" Zou Cheng asked directly, without a word of nonsense, Liang Ying was stunned for a moment.

Shouldn't the interrogation of prisoners take their time, step by step, why did Zou Cheng ask as soon as he came up.

In fact, every prisoner has a method of interrogation, and for some prisoners, you just have to be straightforward and make them think that you have everything under control.

"Why would I do this?"

"My girlfriend died on the roller coaster, aren't you sick?" the man shouted.

Faced with the man's words, Zou Cheng was unmoved, and then asked, "You used to be an engineer at an amusement park, why did they fire you?"

"Because I'm always late, is that okay?" the man said.

"I'm guessing you're going to be annoyed. Zou Cheng said.

"Yes, I'm annoyed, I'm angry, but I'm mad at myself, not the boss, not the amusement park. The man shouted anxiously.

Zou Cheng continued to ask, "Then why did you sneak into the amusement park after you were fired, and you tried to get into the control room of the roller coaster. ”

Faced with Zou Cheng's questioning, the man looked confused, and he said, "I don't know what you're talking about, I've never done this kind of thing." ”

"A week before the accident, your card had tried to swipe open the door to the control room. Zou Cheng said.

"No way, it wasn't me, the day my girlfriend died, it was the first time I went back to the amusement park after being fired. ”

"And, the day I was fired, my card didn't work, how could I get in. This man felt that what Zou Cheng said was inexplicable.

Zou Cheng frowned slightly here, yes, he is an engineer, he naturally understands that his card is no longer usable, it is impossible to swipe the card, and he has swiped it five times.

And he is an engineer of the amusement park, and he knows very well whose card can enter the control room, whose can't, he doesn't need to find seventeen cards.

Although he had these doubts in his heart, Zou Cheng continued to ask: "Roller coaster, you didn't seem to be on the roller coaster at the time, why didn't you ride the roller coaster?"

"My girlfriend and I met for the first time on the platform. She got off the roller coaster and hit me, and that's how we met. ”

"I just want to recreate that scene when I propose, can't I?" When it comes to his dead girlfriend, men's emotions are always abnormal.

And Zou Cheng observed the man's facial expression and found that he was telling the truth, wasn't it him.

Zou Cheng and Liang Yingcries came out of the interrogation room, and Liang Yingcries asked, "Inspector Zou, is it him?"

Zou Cheng shook his head and said: "When he answered my question, his pupils contracted significantly, indicating that he was telling the truth, his micro-expression was his true feelings, and he was innocent." ”

"Micro-expressions?" Liang Ying asked.

"This Zhu Ting knows her very well, you can ask her when you are free. Zou Cheng said to Liang Ying.

Liang Ying said with a wry smile: "I talked to Zhu Ting at the police station, but I found that I didn't seem to have any talent at all, so forget it." ”

Zou Cheng smiled, everyone's talent is different, Zhu Ting's talent is in micro-expressions, and Liang Ying's talent is in the computer in his hand.

It's impossible for everyone to know everything, so it's normal for Liang Yingqi to have no talent for micro-expressions.

"From the state he was in when he talked about his girlfriend, it can be seen that he would not hurt his girlfriend. ”

"So using his employee card should have been the prisoner's first attempt, and the prisoner knew that he had access to the control room, so he got his employee card. ”

But the prisoner didn't know that he had been fired, so the prisoner didn't open the door after swiping it five times, and then the prisoner knew he needed to get a new card. ”

"There were seventeen swipes in the back, and then it was successful, which should be the order before and after the prisoners entered the control room. "Zou Cheng has so much information now, and he can only analyze so much.

Liang Ying nodded and said, "For the sake of this case, the prisoner is really working step by step. ”