"We have reason to believe that in the seven years since the murderer disappeared, he must have undergone more systematic bomb-making training, or he has continuously upgraded his bomb-making technology through independent research and development, and so far, he has become a bomb maker who surpasses the 'Bomberman' Meng Bochao seven years ago." I said in a deep voice.

In the office of the Serious Crime Unit, we and the criminal police team held a case analysis discussion meeting overnight.

"Moreover, the murderer's purpose has also changed dramatically, he has changed from wanting to use a bomb to kill Qi Xuehui seven years ago, and now seven years later, he has changed to playing a bomb game with the police, and he is really a complete bomb maniac." I fixed my mind and added.

"Qi Xuehui hasn't woken up yet?" Lin Zifan's words changed sharply, and he suddenly asked.

Officer Wang shook his head and said seriously: "Although she did not suffer any substantial damage, this time, it caused serious damage to her spirit and psychology. She is still in a deep sleep, her vital signs are stable but her spirit is very weak, and she will need long-term treatment from a psychiatrist to fully recover. But by tomorrow, it's almost time to make a brief inquiry about her. ”

I nodded, letting out a long sigh of relief.

Qi Xuehui must have seen the appearance of the murderer, and I believe that after this danger, she will definitely take the initiative to tell us everything she knows.

"Did the surveillance video in the elevator find the figure of the murderer?" Jiang Tingbai thought about it and asked.

"We focused on checking the 40-minute elevator surveillance video from the first departure of the Qin team to the second return. During this time, only one person had entered the elevator, and that was the young man that Team Qin said, but he did not go to the fifth floor, but to the third floor. "Officer Wang told us about the investigation of the surveillance video by the Technical Investigation Bureau.

"Did you leave fingerprints and footprints? Did you compare it with the crime scene? Jiang Tingbai immediately asked, out of professional habits, he was very concerned about the trace inspection.

Officer Wang still shook his head: "He was wearing gloves at the time, and no fingerprints were found in the elevator, and the footprints in the elevator were very badly damaged, and no valuable footprints were extracted in the corridor on the third floor." ”

"That doesn't mean much, if he was the murderer, he probably took the elevator to the third floor and then went up the stairs to the fifth floor to commit the crime. I'll investigate tomorrow if the residents on the third floor know him. I thought about it for a moment and spoke slowly.

"I've already arranged it, and the criminal police team will go to investigate tomorrow." Officer Wang said seriously.

"I think this case should be investigated from Qi Xuehui, whether it was seven years ago or seven years later, the murderer's target has always been Qi Xuehui."

At this time, Xue Hang, who had not spoken, said slowly.

We all agree with him very much, Qi Xuehui is the core figure in this case, and it is the top priority. But there is one thing we haven't figured out, that is, the murderer wanted Qi Xuehui's life seven years ago, why did he let Qi Xuehui go seven years later?

What has the murderer experienced in the past seven years?

I thought about it, looked at Li Meng, who was in a daze and didn't know what she was thinking, and asked her softly: "Xiaomeng, from the perspective of criminal psychology, is it possible that the murderer has changed his motive for committing the crime in seven years?" ”

Hearing my call, Li Meng came back to his senses and asked a little sneeringly, "What?" ”

I'm a little helpless, but now I'm discussing the case, how can Li Meng be in a daze?

Before Li Meng joined the serious crime team, he was a criminal psychology expert who returned from overseas, and after returning to China, he went directly to work in the Provincial Public Security Department.

It is precisely because of the particularity of her work that when the serious crime team was established, the boss Shen Ruoshan dug her up.

After such a long time of understanding, she must have thought of something when she was in a daze at such an important case analysis meeting.

"Little dream, did you think of something?" I looked at her earnestly and asked softly.

"Sister Li Meng must be thinking, if you go to see Qi Xuehui alone, do you take off and land, hahaha." Jiang Tingbai immediately took over and quipped.

This sentence made everyone laugh.

The tense and serious atmosphere of the case analysis meeting suddenly became lively.

"Get out of the way." Li Meng glanced at Jiang Tingbai fiercely, and cursed in a low voice.

She then looked at me and answered my first question seriously: "The murderer chose to kill, and he planted a bomb in the office, and the directional blasting did not hurt the innocent." This shows that the murderer's goal is very clear, that is, Qi Xuehui, there must be irreconcilable contradictions between the murderer and Qi Xuehui, and it is a typical vendetta. But as time goes on, as the killer grows, it suddenly becomes clear that there is one thing more important than revenge. ”

"So what?" I hurriedly asked.

"The murderer and Qi Xuehui actually don't have a deep hatred, planting the bomb seven years ago is more of a passion killing. So, the age of the murderer will not be very large. Li Meng gave a firm answer of his own.

"Is this your criminal profile?" After listening to this, Officer Wang asked tentatively.

Li Meng pursed his lips, thought for a while, nodded and continued: "The murderer is a man, his education is not high, and his current age should be between twenty and twenty-five years old. If he had planted the bomb seven years ago, then he would have been between the ages of thirteen and eighteen at the time, in the rebellious period of youth, and it was easy to commit murderous acts of passion. But what is obvious is that it is impossible for a young boy to have an intersection with Qi Xuehui, the public relations manager of an online game company. This shows that the little boy's family knew Qi Xuehui and had a conflict with Qi Xuehui, and the little boy had the idea of fighting and killing with passion. ”

Xue Hang nodded, and was the first to agree with Li Meng's criminal profile, because it was also completely consistent with his thoughts: "The key to this case is Qi Xuehui, as long as you can fully grasp Qi Xuehui's social relationship seven years ago, it will be easy to find out this person." ”

"But according to Li Meng's criminal profile, how did a young boy between the ages of thirteen and eighteen master the skills of making bombs and install them in the vents of his office?" Officer Wang once again put forward his own different views based on Li Meng's criminal profile.

This question is very crucial, because bomb making is a very rigorous, sophisticated, and even scientific skill, which includes specialized knowledge of chemistry, physics, and many other aspects, how did a little boy come into contact with these and master them?

Or...... He has a ready-made bomb on his side, just install and activate it?

In the office of the serious crime team, everyone did not say a word.

The room was silent, and all that could be heard was the faint breathing of everyone.

"Perhaps, I have a suitable person here." Lin Zifan opened his mouth quietly, breaking the silence in the office.

Everyone looked at Lin Zifan together.

"Seven years ago, 'Bomberman' Meng Bochao had a son named Meng Xiang, who is twenty-two years old this year, which is completely in line with Li Meng's criminal profile. Moreover, his father can make bombs, so it is very likely that his bomb-making process was learned from Meng Bochao. ”