"If it wasn't a student, who else could it be?" Ran Tao's eyes were as wide as lanterns. "It couldn't really be a guard, right? Did I guess it right again? Am I really that amazing? "
"God my ass! Zhao Yu pondered for a moment before saying, "But … I did think about this before. Well, only a guard entering an empty dormitory wouldn't arouse suspicion!"
"Of course …" Cui Lizhu said. "The guard also has the key to the dormitory!"
"Also, the guard might have the key to every dormitory. When the students go to school, he can sneak into Liu Weiyi's dormitory and read his manuscripts!"
Zhao Yu then said, "Liu Weiyi said that he often left his manuscripts on his bed.
"Maybe the guard saw his manuscripts by accident and was deeply attracted to them …" Lin Sanjiu thought.
"There are several storage rooms in the Zizhen Building that never see the light of day. If he imprisoned the girls there, the outside world would have no way of knowing …" Ran Tao echoed. "Also, the most important thing is that the guard is different from the students. He won't graduate, and he has to come to work every summer!
No matter how you look at it, he has the most conditions! "
Cui Lizhu said, "Didn't we investigate the guard before? Where is the information? "
"It's with me!" Zeng Ke replied, while searching for information. At the same time, he raised an objection. "But … If it was the guard who brought a woman into the school, wouldn't it be too obvious if someone saw it?"
Cui Lizhu said, "Do you think it's possible that the murdered girls weren't lured there by the murderer, but were directly kidnapped by the murderer?
For example, there's a small door in the school that the guard has the key to? Wouldn't it arouse anyone's suspicion if he kidnapped someone from there? "
"Um … This problem is not difficult to solve." Ran Tao nodded. "We just need to ask the school!"
"But … Why?" Wu Xiumin suddenly asked. "The murderer must have a reason for killing people. If it was the guard, why would he do such a thing?
Moreover, based on the theory of abnormality, I feel that if the victims were all college students, it might have something to do with the guard! "
"It's because he sees female university students every day and is envious of them. That's why he targets them!
"But, these victims are all members of society, and they might even be working in a special industry," Wu Xiumin said. "I don't think the guard's theory makes sense!"
"Yeah …" Cui Lizhu said. "The school guards, whether it's the gate or the dormitory, are usually very old people, right?
"Do they have the ability? Even if he had the ability, he's already so old. If he wanted to kill someone, wouldn't he have done it long ago? "
"This is purely your subjective assumption!" Zeng Ke said. "Who said that the guard must be old? When we were in college, the guards were all young … "
Cui Lizhu stuck out her tongue. "Nonsense. You went to a police college, and the people on duty were all armed police officers. Of course, you're young! I think you're just showing off that you went to college!"
"…" Zeng Ke was speechless.
"It's useless to just talk. Let the facts speak for themselves!" Ran Tao opened the security guard's information that Zeng Ke had found and was stunned. "No way! So many? "
"Yeah!" Zeng Ke said. "At that time, there weren't any security companies. All the guards were hired by the school. There were all kinds of guards. Some used their connections, some took up positions and didn't work, and some suddenly had family problems …"
"So, the turnover rate was very high, and there were many positions. During the years of the crime, there were at least a hundred guards, right?"
"Are you stupid?" Cui Lizhu patted Ran Tao. "You're quite good at the big picture. Just look at the guards in the Zizhen Building. How could there be a hundred of them? Um … Um … "After a few glances, it was Cui Lizhu's turn to be depressed." This … What is all this?
Why don't you mark the guard's position? I can't see who is on duty in the Zizhen Building. "
"Yeah," Zeng Ke said. "I'm afraid we have to let the school figure it out! It's already a miracle that they were able to find these records through the account book. Don't forget, it's been more than twenty years! "
"If that's the case," Zhao Yu said to Zeng Ke. "Contact the school and find the guard at the Zhenzhen building. Then, compare the DNA with the one found on the body bag!
Zhao Yu said to Zeng Ke, "According to the DNA, the suspect is a man, and the guard is also a man, so we can't rule him out as a suspect.
Plus, the guard is familiar with the Zizhen Building and the school. He also has a lot of keys, so it's very suspicious! We have to focus our investigation in this direction! "
"Yes!" Zeng Ke and the others nodded.
At this point, the impromptu case analysis meeting should have come to an end. Unexpectedly, just as everyone was about to go back to work, a police officer came to Zhang Peipei with a report.
"This is …" Zhang Peipei opened the report and said, "The analysis of the suspect's DNA has come out. This person should be a local of Chengzhou, and has close blood relations with the Li family in Feng County, Zhu Zhou, and Menxia. His possible surname is 41% Li, 23% Yang, 15% Ji, 11% Wu, and 8% other surnames …"
Cui Lizhu exclaimed, "Wow, that's amazing! You can even calculate his surname! Fortunately, I gave up my career long ago!"
"What you did is not giving up your career," Ran Tao joked. "What you did is turning over a new leaf, okay?"
"If that's the case," Zhao Yu said to Zeng Ke, "Hurry up and see what the guard's surname is."
Then, Zhao Yu opened the list of guards and began to look carefully. Unfortunately, the list was only a salary list, so it didn't show the guard's age.
So, Zhao Yu asked Zhang Peipei, "Dr. Zhang, can we determine the suspect's age at that time through his DNA?"
"It's very difficult," Zhang Peipei said. "Our current method is to observe the repair ability of 8-OHdG, because as people age, the repair ability of DNA gradually declines!
Also, through the overall methylation level of the DNA, the length of the telomeres, and so on, we can make a rough judgment!
But, all the current research methods are not suitable for our situation, because the DNA that we extracted is not fresh. If we were to experiment, there would be a huge error, and it would be full of uncertainty! "
"Oh, I see!" Zhao Yu nodded. "You've said so many technical terms, but you're actually telling me that it's not possible!"
Zhang Peipei was speechless and blushed.
"But, it doesn't matter. At least we have decisive evidence," Zhao Yu said. "At worst, we can compare it with all the hundred security guards. I don't believe that we can't find the suspect!"
: … ::
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