At this time, the siren outside remembered, looking at the red and blue flashing lights, Cheng Han's heart was mixed. She took one last look at Xue Nanguo's corpse and didn't know what to say.

Because this place is about to be locked down, the police intervene, even if she has Xue Nanguo's letter of entrustment, she may not be able to participate in the investigation of this case. Seeing Xue Nanguo being taken away, Cheng Han clutched the letter tightly, and felt a sense of powerlessness, as if he had failed his expectations.

The police officer who took the lead came over and saluted, "Hello, I am from the Island Criminal Police Team, and this place is now taken over by us, please leave the scene of the crime and do not take anything that belongs to the scene." ”

Cheng Han took a deep breath, stepped forward, and showed the letter in his hand to the officer, "Hello, I'm Cheng Han, entrusted by Mr. Xue to investigate the truth of this matter, I don't know if I can stay at the scene and participate in the investigation?" ”

The police officer shook his head a little embarrassed, "I'm really sorry, although you were entrusted, but the private investigation is not allowed by law, so I can't help you." ”

"So, what about this?"

Cheng Han said, taking out his credentials as a special police consultant, "I am a criminal psychologist from the criminal police team of City A, and I have cracked many cases with my colleagues, so can this identity allow me to participate in the investigation?" ”

The police officer took Cheng Han's ID and carefully checked it, "I'm going to go back and ask the leader for instructions, you can leave a phone number, if you can, we will contact you." ”

"Okay, then I'll wait for your news."

Cheng Han glanced at the room, didn't dwell too much, and followed Yu Helin back to the hotel.

Yu Helin never thought that she could experience such an unusual thing when she came to a wedding, but the leader of a future technology company left like this, and she didn't know what kind of impact it would have on the development of social technology. After all, she heard that Xue Nanguo has been working on the wide application of intelligent robots recently.

"Hanhan, you said that Xue Nanguo has so many assets, and now they are all left to Xue Sanxin, will she be the biggest suspect?"

In the eyes of outsiders, Xue Sanxin is indeed suspicious. After all, Xue Nanguo's death is the one who benefits the most. And Cheng Han also found out that Xue Sanxin's own meal replacement snack brand, although looking at the scenery, there are many Internet celebrities to promote, but the promotion cost of each Internet celebrity is too large, and the taste and effect of the product itself are not qualified.

And her husband of the rich second generation is actually just a PUA enthusiast who takes the opportunity to package himself. The luxury car watches on social networks are all photoshopped. Even the big pigeon eggs in Xue Sanxin's hands are afraid that they are fake.

"At present, it seems that we still have to wait for the autopsy results from the forensic doctor to see what the private message is, so that they can judge the nature of this case."

After Cheng Han finished speaking, he added in his heart, after all, Xue Nanguo did not have any obvious external injuries on his body, so it was impossible to judge what his real cause of death was for the time being.

What's more, there is another person who has been hiding in the shadows and has not appeared.

At this moment, although Cheng Han was sitting on the bed, his mind was in chaos, and what he was most worried about was that he would not be able to participate in the investigation of the case.

At this moment, Xiao Rongzheng's phone called. Cheng Han picked up his mobile phone, looked at Yu Helin, who was lying next to him watching TV, walked to the bathroom, and closed the door.

"Hey, Ah Zheng."

"It's me, how's it going, is the island fun?"

Xiao Rongzheng's deep voice gave Cheng Han a hint of comfort.

"Xue Nanguo is dead."

She didn't want to hide it, because Xue Nanguo was a big man, and his death would be reported by the media later.

"What? What's going on? You're alright! ”

"I'm fine, I'm just a little worried."

Cheng Han told Xiao Rongzheng everything she had experienced during the day, including her self-revealing identity. Xiao Rongzheng frowned and listened, and also sweated for her.

"Hanhan, you don't have to worry about this. Get a good night's sleep tonight, and maybe there will be good news tomorrow! ”

"Huh? Why? What do you know? ”

Xiao Rongzheng laughed in a low voice, "Where do I know anything, it's just to put you at ease." Okay, I'm still on duty, hang up the phone first, don't think too much, go to bed early. ”

After saying this, he turned his head to look at the empty surroundings, and whispered with his hand on the microphone of his mobile phone, "Momoda." ”

His voice was very soft, but Cheng Han, who had sharp ears, could still hear it clearly. Her ears were red all at once, and her cheeks were hot, as if he were really saying these words to himself now.

"Mo-da-da."

Cheng Han also replied to this sentence in his way, and without waiting for him to react, he quickly hung up the phone.

The next day, it wasn't until about two o'clock in the afternoon that the police on the island contacted Cheng Han.

"Dr. Cheng, your application has been approved, and you can come over now."

Cheng Han was having afternoon tea with Yu Helin, and as soon as he received this call, he didn't want anything on the fork, so he immediately got up, "Helin, I'm going to go!" ”

Yu Helin had long been accustomed to it, and with a wave of her hand, Cheng Han left. She was alone in front of a table of delicacies, but she had lost the appetite she had just had.

"This young lady, I see you sitting here alone, do you mind if I come to share a table?"

She looked up and saw a big, curly-haired half-breed boy smiling at herself, baring his white teeth. Wearing a resort-style short-sleeved shirt with bells and whistles on him, he felt that it was the haute couture of which clothing brand.

Looking at his eyes that were different from his own, Yu Helin subconsciously touched his big earrings and shook his head, "Sit down." ”

Coming to this scene again, Cheng Han looked at the busy people coming and going, and always felt a little inexplicable familiarity. The garden that was originally decorated with flowers was now dark, and she saw a haggard Xue Sanxin walking in front of her, and just wanted to comfort her, but Xue Sanxin turned his head away and stopped looking at her.

In the entire villa, it was still the same scene as yesterday, except for the fact that a cordon was set up at the door of Xue Nanguo's room. Cheng Han walked to the cordon, showed his documents, and was easily released.

The room was still the same as yesterday, but Cheng Han found with a sharp eye that the door lock of this room was knocked open by an external force.

"What's going on here?"

She was muttering to herself when she heard someone behind her say, "This is where the firefighter who saved the man yesterday split it with an axe." ”

Cheng Han turned around in surprise and saw Xiao Rongzheng and Xu Ranran standing behind her, looking at him with a smile.

"Why are you here?"

Xiao Rongzheng took out a brand new pair of gloves from his pocket and handed them to Cheng Han, saying, "This is also a cooperative investigation applied by the Island City Bureau and City A, because Xue Nanguo is really a pivotal figure, and the big names attach great importance to his death." In addition, the efficiency of our criminal police team in city A in solving cases in recent years has been good, so let our two cities cooperate to ensure that the truth is investigated. ”

"When did you get here?"

"This morning's plane is only half an hour ahead of you."

"So, it seems that the autopsy results are in?"

"Yes."

"What's going on?"

Cheng Han was really a little curious, what kind of profound techniques could kill people so unknowingly.

"The medical examiner found a large amount of cake residue in Xue Nanguo's stomach, which contained a large amount of belladonna, and that amount was enough to kill an adult."

"Belladonna? Isn't this a cure for stomach problems? ”

Cheng Han was puzzled.

"You're talking about belladonna slices, and the real belladonna fruit is sauce purple and has a sweet and sour taste, and if you don't know, you will mistake it for an ordinary plum. A small amount can cause dilated pupils, sensitivity to light, headaches, confusion, and withdrawal, but as little as ten to twenty fruits can kill a person. ”

Xiao Rongzheng explained, but Cheng Han was thinking about the state of Xue Nanguo at that time. Others don't know, but Cheng Han knows it in his heart, his drunkenness at that time was just an illusion, in order to leave the wedding scene in advance.

He originally booked a car at three o'clock in the afternoon to leave the villa, away from the strife here, but he didn't expect that the car didn't wait, but waited for the king of Hades.

"So, how long does it take for this belladonna to work?"

"Fifteen minutes or so."

"At yesterday's banquet, Xue Nanguo was very cautious and barely ate. And the cake at the wedding is pure white, made of white chocolate, and there is no other taste. Therefore, it is unlikely that he will be poisoned at the wedding reception.

With a fixed dish on each table, the poisoner had no way to determine that Xue Nan would eat the poisonous piece of cake. And if it's someone else who dies, that person loses even more than it gains. ”

"So, what do you think?"

Xiao Rongzheng asked with some curiosity, and Xu Ranran and Bai Ge behind him also looked at her intently.

"From the garden to Xue Nanguo's room on the second floor, it took almost three minutes to walk quickly. Xue Nanguo is an unhurried character, and five to six minutes is about the same for him. That is, he was alone during this time. It is highly likely that the killer followed him all the way back to his room during this time, and then gave him a topping cake during this time.

Wait until he finishes eating and returns to his room to rest, and wait until the poison hair can complete the task perfectly. ”

"Then this person should be someone that Xue Nanguo knows and trusts, otherwise how could such a cautious person as he eat something from an unknown source!"

Just as everyone was discussing here, they heard someone coming behind them. A few people hurriedly turned around and saw two young men with some eyes.

"Hello, I'm the captain of the Island Criminal Police Team, Chu Tianyao. This is my team member, Xu Jiajia. Come over here, you can tell us anything you want, and we'll do our best to help. ”

Several people politely stepped forward to say hello, and after introducing themselves, they followed Chu Tianyao to the temporary office next to them, looking at the evidence they were collecting now.

In one photo, Xue Nanguo was lying on the bed with his eyes closed, and the layout of the room was taken clearly.

Cheng Han picked it up and looked at it carefully, and asked, "When was this photo taken?" ”

Chu Tianyao glanced at it, "Oh, this, this was taken when our rescuers broke into the door." Because the fire did not continue to the house at that time, there is no theory that Xue Nanguo ingested too much poisonous gas and thus suffocated to death. They thought it was strange, so they carefully photographed the room layout at that time and used it for our police reference. ”

"Then they really have a heart."

This small gesture really provided a lot of help. Because Cheng Han had already noticed that there were dark purple crumbs on the white carpet in the room.

She magnified this and put it in front of everyone's eyes, "This thing is a bit like cake crumbs, did you find it when you searched the scene, Captain Chu?" ”

If she didn't guess wrong, this should be the poisoned cake that finally killed Xue Nanguo. Who knew that when Chu Tianyao saw this detail, his face changed, and he said with some regret, "We didn't see this when we went to the scene to collect evidence." Dark things are noticeable on top of white, and we won't see them. ”

Cheng Han chuckled in her heart, and connected with the door that had been split open by an axe before, and a bold idea appeared in her mind, "Could it be that the murderer wants to disguise the scene as a closed room case?" ”

"A closed room case?"

The crowd was amazed.

"First of all, I learned from Xue Nanguo's housekeeper that he didn't have the habit of going back to his room to lock the door. Because he was afraid that after locking the door, he would not be able to flee the scene as soon as he encountered danger.

Secondly, there are keys, each room of the villa has two keys, one is a spare key, and one is normal. According to your search, Xue Nanguo's key was found in his jacket pocket. And the keys in the butler's hand are still strung together and not lost.

In such a situation, the person who can return to the scene after everyone has fled for their lives and take the cake crumbs with them should have a third key in their hands. But where exactly he came back from is worth asking the guests of the time.

And it can be seen that this fire is not what he expected. It is precisely because of this fire that the careful rescuers exposed the flaws in his originally carefully designed case of the closed room. ”

After Cheng Han finished speaking, he saw that the others were listening with relish.

"Do you guys have any ideas?" She asked.

Chu Tianyao asked first, "How do you know that this fire was not planned by the murderer?" If it were me, I would have felt that such a messy scene would be more conducive to me getting out. ”

Cheng Han nodded in agreement, "What you said is not unreasonable, but what this murderer wants is not just to kill Xue Nanguo. What the murderer wants more is a kind of show-off, or it can be said to be a show-off. ”

"Show off? What's going on? Xiao Rongzheng asked.

"Judging from my current analysis, it is very likely that this person has been living in the shadow of Xue Nanguo all along, after all, there are not many people with such a smart brain. And choosing to torture him with a deadly poison like belladonna and let him die of pain can also be seen as the starting point for the murderer to vent his emotions.

The reason why this person wants to design a case with a closed room that seems to have no flaws is to show that his IQ is not inferior to Xue Nanguo. If you follow the 'normal' steps, the murderer should have cleaned up the scene when he committed the crime. But the sound of the fire alarm made the man panic, and he had to leave first, and then come back to clean up the debris.

Moreover, before that, Xue Nanguo told me that someone often pretends to be a ghost to scare him, and we don't know if this person will be related to the murderer. However, I can now be sure that the murderer is still in this villa! ”