The performance outside is still continuing, the Municipal Public Security Bureau Cultural Protection Office in the museum security office is located in the small building next door to the museum, two policemen quickly arrived, they confirmed that Li Dong died, suddenly realized something, rushed to the exhibition hall on the second floor, the door of the exhibition hall was hidden, the police pushed the door open, they were stunned by the scene in front of them, 4 security guards lying on the ground, and the "Han Xizai Night Banquet" is still in the glass case, there is nothing unusual. Looking closely, the people on the ground were just asleep, as if they had been turned over. The two shook them awake vigorously, and several security guards opened their eyes in a daze and got up from the ground, all with blank faces.

"What's going on?" A police officer asked.

Several security guards looked at each other, and one of them patted his head and slurred: "I...... I don't know...... What's going on...... It's just like suddenly being very ...... And then I don't know anything......"

Others say something similar.

The police asked if they had eaten or drunk anything. Another security guard replied that he had drunk the old fire soup from Li Dong and made by his girlfriend - lion's mane mushroom and cordyceps flower bamboo fungus soup.

Li Dong's girlfriend is Cantonese, she makes delicious Cantonese food, especially good at making all kinds of beautiful soups, and is very considerate to Li Dong. Li Dong is very generous and often shares it with his brothers, and today is no exception, bringing the whole pot of soup to the second floor, and preparing a few disposable cups, and giving each security guard on duty a cup of hot soup.

"You've all had soup? Li Dong looked at what you drank? The police asked again.

According to several security guards, after 5 p.m., the other exhibition halls in the museum were locked, except for the small exhibition hall where "Han Xizai's Night Banquet" was exhibited and opened to the public until 7:30 p.m., and between 5 and 7:30 p.m., a total of six security guards, each in groups of two, patrolled various areas on the second floor of the museum, and there were two people in the exhibition hall at any time. Everyone drank the soup sent by Li Dong, and the last security guard who finished drinking the soup saw that Li Dong took the used cup and the thermos pot away.

Although the painting was still in the glass case, the two policemen felt that things would not be so simple, and they checked the entire exhibition hall, and the glass cabinet was locked, intact, and there was nothing unusual about it. They went outside the exhibition hall again, patrolled the corridor, and finally, they made a startling discovery at the end of the corridor on the second floor. There was an infrared security window, and the lock of the security window was opened, and it looked like someone had broken in from the outside. However, when someone enters the defense zone to block the infrared rays, the infrared sensor alarm installed on the burglar window will immediately send out an alarm signal, why are the security guards on duty and others in the museum not aware of it?

The police found the thermos pot in the lounge where Li Dong died, which had been cleaned, packed in a bag, and rested on a chair. There are also several used disposable paper cups in the bag.

There are also security guards on duty in the monitoring room, and there is no reason why they didn't find out when such a big thing happened. The police walked into the monitoring room, and two security guards were sitting in front of the surveillance video wall, staring intently at the screen.

"Did you find anything?" The police asked.

The two security guards said no, they never left, and everything was normal when they watched the surveillance video.

At this time, Chen Yufei, Cheng Yijie and He Muxuan also entered the monitoring room. The performance outside is not over yet, but in order to avoid the crowded crowd, Chen Yufei left the venue early, just as Cheng Yijie and He Muxuan were about to enter the museum, and the three of them quickly knew what was happening in the museum and came to take a look.

Chen Yufei showed her ID, and the police asked her to participate in the investigation. Chen Yufei asked Cheng Yijie for help, but He Muxuan could only avoid it.

After looking at the surveillance, the results were astounding. The exhibition hall in the surveillance video is calm, there are two security guards on duty all the time, and some of the audience visits the picture, and even the security guard is not filmed, let alone others. At 6 o'clock, two security guards appeared in the surveillance footage of the corridor, and they patrolled along the corridor, both of them confirmed that they carefully checked the infrared security window at that time, and confirmed that the window was locked from the inside, and did not find anything abnormal.

The two security guards left the corridor 10 minutes later, and at 6:31, Li Dong, wearing a security uniform, appeared in the corridor, and he walked until the end of the corridor, as if checking the infrared security window again. The security guards in the monitoring room saw this scene, but they thought that Li Dong was patrolling again to strengthen precautions and did not care.

The scene of Li Dong delivering soup was also filmed, that is, after he left the corridor, when he had already taken off his security uniform and changed into civilian clothes. He approached several security guards on duty and handed each of them a cup of soup. Because Li Dong often sent soup to his brothers before, he also did not attract the attention of the security guards in the monitoring room. Li Dong delivered the soup between 6:45 and 7, and there were exactly two sets of security guards changing shifts during that time, and Li Dong gave soup to the two security guards who were about to enter the exhibition hall, that is, the two who had patrolled along the corridor before, and the two security guards who came out of the exhibition hall. The two security guards finished their day's work after leaving the exhibition hall, leaving the museum before the others left work, leaving the two security guards in the exhibition hall to continue to be on duty. Two other security guards patrolled other areas on the second floor, and Mr. Li later brought them soup.

"Do you see anything wrong with the surveillance footage?" Chen Yufei asked Cheng Yijie, her eyes were wide open, she didn't see the slightest clue, she could only hope for Cheng Yijie's fiery eyes.

"There are definitely problems, but I need further confirmation." Cheng Yijie sold a pass, "Let's go to the exhibition hall on the second floor first, that painting must have been transferred." ”

The two policemen took Mu Qingcheng to the second floor for questioning and asked her to tell her in detail what happened. Mu Qingcheng started from Shi Qi asking her to help deliver bento and soup, and continued to talk about the specific situation of finding the corpse.

Cheng Yijie and Chen Yufei also happened to come to the second floor and heard Mu Qingcheng's story. Cheng Yijie interjected and asked, "When you saw Li Dong's body, he was wearing a security uniform?" What time was it? ”

Mu Qingcheng nodded. "It should have been just after half past six."

Then the biggest possibility is that Li Dong first opened the lock of the anti-theft window from the inside to facilitate the invasion of thieves. After that, he put drugs such as anesthetics into the soup and asked several security guards

Drink separately. Cheng Yijie speculated, "I got the patrol time and sequence of the six security guards on the second floor tonight, at 7 o'clock, the two security guards in the exhibition hall and the two security guards patrolling the corridor handed over, and the two security guards in the exhibition hall got off work." At half past seven o'clock, the two security guards who took over the corridor patrol entered the exhibition hall to help clear the venue, and after a comprehensive inspection of the exhibition hall, the door of the exhibition hall was locked. Originally, after the exhibition hall door was locked, the museum was also closed. According to the security guards in the surveillance room, Li Dong told them in advance that the leaders had explained that the exhibition time would be extended by an hour, and they did not suspect this. It can be seen that Li Dong calculated the dosage of the drug and the time of the attack, so that the four security guards only had a seizure after the scene was cleared at half past 7 o'clock, and collapsed in the exhibition hall. The surveillance video of the exhibition hall was tampered with, and the thieves had enough time to take away the copy of "Han Xizai's Night Banquet" by the Song people. ”

"I've been in contact with the two security guards who are off duty, and they are safe and sound, and there is nothing abnormal in their health." A police officer chimed in.

This further confirms my suspicion that the medicine is in the cup, not in the soup. The two security guards who had already left work were not drugged in the soup they drank. Cheng Yijie said, "Li Dong is obviously an internal response, he can clearly grasp the time and place of the security guard's duty, arrange everything in advance, and provide the greatest convenience for the thieves." But he is just a pawn, and the greatest possibility is that he is threatened, controlled by others, and discarded after the pawn is used up. After he did everything according to the other party's request, he returned to the duty room and began to eat dinner, the food was poisoned, and he died of poison after only one bite. ”

Chen Yufei stared keenly at Mu Qingcheng. "Li Dong's dinner was delivered to him by you."

Mu Qingcheng instinctively straightened her back, the policeman who asked just now, the same tone as Chen Yufei, thought that she was suspected of poisoning, which made her feel very uncomfortable. "I sent it, but I didn't touch it at all." She defended herself coldly, "I was just entrusted by someone to deliver the things and leave." ”

"I know, it was your colleague Shi Qi who asked you to help deliver it." Chen Yufei's tone was also cold, "I heard that Shi Qi is the manager of the cultural relics warehouse like you, what kind of person do you think?" ”

Mu Qingcheng's heart tightened, judging from the current situation, the person who poisoned the meal, except for Li Dong's girlfriend, the most likely person was Shi Qi. But she and Shi Qi are just ordinary colleagues, and they basically have no contact in private. "He is very conscientious and responsible, but his personality is more mother-in-law. I don't know about the rest. ”

"Let's go to the exhibition hall first, have the cultural relics identification experts contacted us?" Cheng Yijie did not suspect Mu Qingcheng at all, and naturally he was reluctant to interrogate her.

"I just called, two experts also came to watch the show tonight, the show has ended, they just left, and they immediately turned back." Chen Yufei replied.

A few people then went to the exhibition hall, and before the experts arrived, Zhong Chun, Zhong Jinxiang and his son, as well as Gu Hengyu and Yu Qingsheng also rushed to hear the news, and the four of them were worried. Two cultural relics experts immediately arrived, and after their identification, it was indeed as Cheng Yijie expected, the painting in the glass frame is a fake, and the original exhibition of the original work has been transferred. And just before the exhibition was set up this morning, two experts reconfirmed that the painting was genuine, which shows that the original work was transferred during the exhibition.