Chapter 94 Technological Innovation
Zhou Yi's words lifted Wu Yongcheng's spirits.
"What method?"
“DNA technology!”
Zhou Yi's answer did not surprise Wu Yongcheng and Xu Nian. As veteran criminal police and top forensic scientists, they had certainly heard of this technology.
But just because you’ve heard of it doesn’t mean you can use it.
For Hongcheng in 1997, and even for more than 99% of cities in the country, this technology was almost a legend.
Regardless of the era, advanced science and technology always means huge economic costs and resources.
In 1997, if we wanted to build a professional DNA testing laboratory, we would not only need a large amount of funds, but also professional equipment, talents and a complete system.
This is a very difficult thing for Hongcheng.
"Go to the provincial capital to seek help." Zhou Yi said.
Wu Yongcheng took out a cigarette box and was about to take out a cigarette when he saw Xu Nian and silently put the cigarette box away.
"As far as I know, the provincial capital doesn't have this technology either, right?"
Zhou Yi recalled that the first DNA testing laboratory in the provincial capital seemed to have been established in 1997, the year Hong Kong returned to China, but he was not sure what stage of preparation it had reached now.
"Captain Wu, why not ask? Just in case."
"In this case, only if it's confirmed beyond a shadow of a doubt that the deceased is Zhang Hui will Xu Jiaguang be unable to argue. Otherwise, even if he's brought to court, there's still a lot of uncertainty about his sentencing."
"Alright, then we'll have to try our best. I'll go find Director Xie. He's the only one who can handle this."
The three of them acted separately. Zhou Yi planned to meet Xu Jiaguang first, just in case he could pry open his mouth.
As someone who had witnessed the improvement in crime-solving efficiency brought about by technological innovation in his previous life, Zhou Yi knew how important this matter was.
The times and technology are inseparable from police solving cases.
In ancient times, there was a technique called blood test to identify relatives, which was regarded as the truth by the ancients. However, it actually had huge limitations and caused many false cases.
In modern times, the development of fingerprint and blood typing technology has provided more accurate means of solving crimes. However, blood type itself is not unique, and most people have blood types O, A, B, and AB.
Before the popularization of DNA technology, forensic doctors mainly used blood type matching to determine the information of the deceased when comparing physical evidence during autopsies.
Although it has a certain degree of accuracy, it also has great limitations.
DNA, like fingerprints, is a unique marker. Even more accurate than fingerprints, it can be extracted from a drop of blood or even a strand of hair.
"It would be great if Hongcheng had its own DNA laboratory." Zhou Yi sighed sincerely.
Just as Zhou Yi was about to walk to the door of the interrogation room, he saw Chen Yan head-on with a strange expression on his face.
"Brother Yan, what's wrong?"
Zhou Yi remembered that Captain Wu asked Chen Yan to go to Xu Xinxin's school to wait for Xu Jiaguang.
"That's perfect. Zhou Yi, come and see me. I brought Xu Jiaguang's daughter, Xu Xinxin, here."
Zhou Yi was stunned. Why was the little girl brought to the Municipal Bureau? But then he thought, given the current situation, there really was no place for the little girl to stay. The safest option was to bring her to the Public Security Bureau.
Zhou Yi followed Chen Yan to the duty room, "What happened to Xu Xinxin?"
The two of them walked to the door of the duty room. On a chair in the room sat a little girl, carrying a schoolbag, sitting there in a daze. It could be seen that the little girl looked like Xu Jiaguang.
There was a female police officer next to her, holding an apple and handing it to her. She looked at it, but seemed not to react, her eyes a little dull.
"Does Xu Xinxin have an intellectual disability?" Zhou Yi asked.
"Probably not. If someone has an intellectual disability, normal schools won't accept them."
"But she seems a little abnormal."
The policewoman finally stuffed the apple into the little girl's hand. The little girl stared at the apple in her hand for a long time before she opened her mouth and took a bite.
"I asked the teachers at school, and Xu Xinxin's class teacher said that Xu Xinxin's academic performance was very poor, basically at the bottom of the class. Moreover, her reaction was very slow, and it was difficult for her to concentrate, and she often appeared distracted," said Chen Yan.
"Was it like this from the beginning?"
Xu Xinxin is eight years old, which means she is in the second grade of elementary school.
"The head teacher said she had it from the beginning. At the time, they thought she was just not adapting to primary school, but she didn't expect it to get worse. The head teacher even specifically told her parents to take her to the hospital."
"What did the hospital say?"
"I suspect her parents never took their child to the hospital. Because when the head teacher asked again, Zhang Hui just said, 'I saw the doctor and he said there was nothing wrong with my child.'" Chen Yan said angrily.
Zhou Yi walked up to the little girl, squatted down and whispered, "Xu Xinxin."
The little girl's reaction was obviously a few beats slower. After a few seconds, she turned her head to look at Zhou Yi with a dull expression.
"Do you know what your parents' names are?"
After a long while, the little girl said, "Mom...Mom is gone."
Zhou Yi frowned. From the outside, the little girl didn't seem to have any intellectual disabilities.
Because children with intellectual disabilities will also have their physical functions affected to a certain extent, such as crooked mouth, squinting eyes, uncoordinated limbs and other problems.
Xu Xinxin is obviously not like that. His appearance, facial features and movements are all normal, except that he reacts slowly, has a dull expression and unfocused eyes.
"Brother Yan, please ask forensic doctor Xu to come to the duty room and ask her to take a look at this."
When he heard that Xu Nian was going to be called, Chen Yan immediately agreed and ran out.
A few minutes later, Chen Yan came back with Xu Nian.
"Zhou Yi, what's wrong?"
Zhou Yi stood up and briefly explained what he found strange. After Xu Nian understood what he meant, he immediately began to examine the child.
Her method was obviously much more professional, including observing the pupil's reaction to light and focusing, and then asking some questions.
Zhou Yi knew from her gradually furrowed brows that the situation was not optimistic.
"How is it?" Chen Yan asked.
Xu Nian stood up, pulled the two aside, and said, "This child has some problems with her reflexes. Her pupils react slowly to light, which is a problem with the superficial reflexes of her reflexes. As for her slow cognitive response, it probably has little to do with her reflexes. It may be due to damage to the neurons in her brain."
"My advice is that it's best to go to the hospital for a comprehensive, professional examination."
"What kind of situation would usually lead to such consequences?" Zhou Yi asked.
"It's hard to say. If it's neuronal damage, it might be caused by trauma. But if there are problems with both the reflex nerves and brain neurons, it might be caused by drugs or something else. This kind of damage is generally irreversible." Xu Nian looked at the little girl sitting there with sympathy.
Zhou Yi was suddenly startled, "Medicine?"
He suddenly seemed to have thought of something, turned around and walked straight to the interrogation room where Xu Jiaguang was imprisoned.
Chen Yan and Xu Nian were confused and immediately chased after him.
Zhou Yi rushed directly into the interrogation room and pushed the door open with a bang, scaring Xu Jiaguang inside.
As soon as he saw someone coming in, the man rushed towards him.
Zhou Yi grabbed Xu Jiaguang by the collar and asked loudly, "What medicine did you give Xu Xinxin?"
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