Just when Zhao Yu was shocked, the video secretly taken in the surveillance was still continuing, and after Han Kuan stood outside the toilet partition and showed his abnormality, he didn't even have two seconds, and he quickly recovered.

At that time, he seemed to realize something, and hurried back to the urinal, and then looked around suspiciously, almost seeing the camera that Zeng Ke had installed.

Fortunately, at the critical moment, the police officer waiting outside the door was a little impatient and knocked on the door. Han Kuan quickly retracted his gaze, lifted his pants vigorously, and hurriedly ran out of the toilet......

After the video of "Team Leader ......" was played, Wu Xiumin, who had always been steady, couldn't help but take the lead in speaking, she looked at Zhao Yu with incredible eyes and said, "Team leader, what kind of person are you!......? It's incredible!"

"It seems ......" Miao Ying said with a solemn expression, "Han Kuan really has something to do with the North Migration Demon Case?"

"I ...... I still can't figure it out......" Zeng Ke said messily, "How is it possible? It was Han Kuan himself who called us over, if he was one of the culprits in the demon case, then it would be too much to say, wouldn't he be worried that we would find out his head at all?"

"I don't know if he's the culprit!" Wu Xiumin put another laptop computer in front of everyone's eyes and said, "But Han Kuan's reaction definitely speaks for itself!"

It turned out that what Wu Xiumin let everyone see was the real-time monitoring of the cell, but when he saw Han Kuan after returning to the cage, there were obvious psychological fluctuations. He was no longer as calm and steady as before, but his eyes were evasive, extremely nervous, as if he was worried about something important......

"Inside the toilet, it's a stress reaction!" Wu Xiumin said, "In that sudden situation, Han Kuan should have been unprepared, so his reactions are objective and true! When he heard the words 'Demon Case', there was an obvious abnormal behavior, which was enough to show that the team leader's words touched his secret."

"So......" Wu Xiumin said, pointing to the two videos, "Judging from my professional point of view, Han Kuan must know some inside story about the demon case!"

"One of the five unsolved cases!" hehe...... Miao Ying shook her head and smiled, "I finally caught up with one......! Who would have thought that the murderous demon of the demon case has always been by our side? Zhao Yu ......" As she spoke, Miao Ying excitedly pulled Zhao Yu's arm and asked, "Tonight, Han Kuan will be sent back to the detention center! Are we going to interrogate him again now?"

"No......" At this moment, Zhao Yu had not recovered from the horror just now, and in the video, Han Kuan's strange reaction made him shudder in his heart. He slowed down for a long time, and then said to Miao Ying, "If there is a showdown now, it won't work at all! There is no evidence, everything we do now is speculation out of thin air, and there is no capital for a showdown at all!"

"And...... Don't you think it'......" Zhao Yu asked rhetorically, "If we really have a showdown with him, won't he be as worried as he is now?"

"Yes!" Zeng Ke said, "Where can we find evidence for such a long time ago? If the demon case is easy to solve, I'm afraid it will be solved long ago!"

"I ...... Hmm......" Wu Xiumin said in deep thought, "I could have invited my teacher to arrange a hypnosis for Han Kuan!" but...... Tsk......" Wu Xiumin said helplessly to everyone, "First, hypnosis may not really work;

"Second, even if it works, it cannot be used as evidence in court;

"Thirdly, hypnosis, like polygraphy, requires the permission of the relevant laws because it involves personal privacy! And if you want to get permission, you must have certain evidence! But ...... We don't have anything!

"So, according to Han Kuan's current situation, it is impossible for the above to approve it!"

"That's equivalent to talking for a long time!" Zeng Ke said depressedly, "If you want me to see, Han Kuan must be completely sure that we can't find anything, so he dared to call our special investigation team over! The team leader is right, we were all used by this person!"

"Almost!" Zhao Yu said stupidly, "I really underestimated this guy who wrote it!, but ......" Speaking of this, Zhao Yu's eyes suddenly lit up, "However, there is no need for everyone to be discouraged, on the contrary, we should be happy! Don't forget, we can all win the first unsolved case of the headless female corpse, what else can be difficult for us?"

"So......" Miao Ying asked excitedly, "what the hell did you think of again?"

"No!" Zhao Yu replied calmly, "Han Kuan's case is completely different from previous cases, this person is thoughtful, not such an easy person! In order for him to tell the truth, we must get solid evidence!"

"Of course, you don't have to be too anxious!" he said to everyone comfortingly, "As the saying goes, there is nothing difficult in the world, only people who are afraid of it, in the past, we felt that the case was difficult to solve because we had no goal and felt lost." But now, now that we have a clear goal, we can go one step further than before!"

"That's ......right," Zeng Ke said like a sycophant, "This is the case on Yongjin Island, at first, we couldn't see the truth clearly, so we were very confused! But later, when we suddenly locked on Dou Zili, we found that the clues and evidence were all found out!"

"That's right!" Zhao Yu nodded, "That's what it means, since we are now locked on Han Kuan and have a major suspicion, then as long as we focus our investigation on him and the demon case, we will definitely be able to gain something!"

"Hmm...... We ...... before," Wu Xiumin said, pointing to the document on his desk, "We have investigated a lot of information about Han Kuan, but it doesn't seem to have found any problems here......

"That's not enough!" Zhao Yu said categorically, "It's far from enough! The demon case is so far away, we have to look farther ahead!"

"Right...... By the way......" Zeng Ke comprehended, and immediately said, "I'll go investigate now, what was Han Kuan doing in the year when the demon case happened?"

"He was still in school at the time!" Wu Xiumin said, "I think it should be the year I am about to graduate......! We have to focus on investigating Han Kuan's situation when he was in school, and see who he dated and what happened to him?"

"Okay, then I'll go and get the information on the demon case," Miao Ying said, "Let's go through the demon case again!"

"I think ......," Wu Xiumin said again, "In the toilet, judging from Han Kuan's abnormal performance, I think there may be errors in the psychological assessment I made for him before! Han Kuan's psychological symptoms may have intermittent tendencies, so I have to redraft an evaluation test book and give him a detailed psychological evaluation!"

"If I can find the law of his psychological changes, maybe, I can prescribe the right medicine and find his weaknesses!"

"Okay!" Seeing that everyone's morale had greatly increased and their confidence was full of confidence, Zhao Yu was also very pleased, he immediately pointed to the two boxes, and said, "Since this is the case, then I will rummage through these two boxes again to see if there is anything left behind?" I think that the demon case needs to be investigated, but we can't leave the matter of Han Kuan's murder of his wife ...... left behind."