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In the imperial study, Qin Mu took the fingerprint that Yu Chenglong had someone copy from the dagger handle and placed it on the imperial table, comparing it one by one with Yang Guan's ten fingerprints.
This is a meticulous job. Qin Mu felt dizzy just after comparing five fingerprints.
He straightened up and said to Li Xiangjun and Li Zhiyin who were waiting beside him, "Xiangjun, Zhiyin, come here and compare it carefully for me to see if there is any fingerprint that matches this one."
Women are more careful, and Li Xiangjun and others are fully capable of this kind of comparison work.
The two bowed and walked forward. Li Xiangjun asked softly, "Your Majesty, do you want to use fingerprint comparison to identify whether Yang Guan is the murderer?"
"Well, this involves human lives, so you have to be careful and compare them carefully one by one."
"Nunu understands, your majesty, don't worry."
Qin Mu leaned back in his chair, drank a sip of tea, and took a short rest.
In fact, in China, people have recognized the uniqueness of fingerprints a long time ago. Jia Gongyan of the Tang Dynasty should be the first person in the world to propose using fingerprints to identify people.
Since the Tang Dynasty, fingerprints, knuckle prints, and palm prints have been used as personal identification in various documents and contracts, both official and private. When officials were examining cases, if they encountered people who could not write, they would ask them to press their fingerprints instead of signing.
Qin Mu was a little confused at first. Since people already knew that fingerprints could be used to identify people, why had fingerprint recognition technology never played its due role in solving cases, and even been ignored
Later, he finally figured it out. With ancient technology, it was too difficult to extract complete fingerprints at the crime scene. The possibility was almost negligible.
Therefore, although people know how to use fingerprints instead of signatures to verify authenticity, officials rarely use fingerprints to identify the murderer when solving a case.
As far as Qin Mu knew, in later generations, a method was often used to extract fingerprints at the crime scene. Using fine iron powder particles and a magnet as a brush, gently brushing back and forth, any fingerprints would appear.
There are also some simpler methods, such as using a magnifying glass to observe under certain light and angle, which can also reveal some fingerprints that are difficult to see with the naked eye. You can also observe by breathing on the surface of some smooth objects.
Li Xiangjun and Liao Zhiyin were very serious and compared the fingerprints twice. They even compared the five that Qin Mu had compared before, and then said to Qin Mu: "Your Majesty, we have done the comparison and can confirm that the fingerprints left on the dagger handle do not match the fingerprints of Yang Guan's ten fingers."
Qin Mu just nodded slightly without any further expression.
Li Xiangjun didn't expect him to react like this, and couldn't help but say, "Your Majesty, since the fingerprints don't match, doesn't that mean Yang Guan is not the murderer? Your Majesty..."
Qin Mu said, "I don't just want to prove that Yang Guan is not the murderer, nor do I just want to find the murderer in this case. Therefore, the results of the fingerprint comparison, you two should not tell anyone else for the time being. Remember?"
Li Xiangjun couldn't help but look at Li Zhiyin, both of them were very surprised, but she was very smart and quickly thought of other possibilities.
"Nunu has made note of it." She and Li Zhiyin bowed quickly and replied.
"You guys should leave first. Um, go out and ask Xiao Bao to call Huang Lianshan in."
"Yes, Your Majesty."
Qin Mu finished speaking. He stood up and took a copy of "Xi Yuan Ji Lu" from the bookshelf next to him and started flipping through it. You won't know until you read it. Once you read it, you will be shocked. "Xi Yuan Ji Lu" can definitely be called a great work in forensic identification.
The content is so detailed that it is hard to imagine unless you read it. Even the things that the coroner needs to pay attention to before performing an autopsy are described in great detail.
For example: After receiving the autopsy document, the coroner must not meet with officials, scholars, quacks, monks or Taoists near the scene of the accident to prevent them from defrauding and causing trouble.
Nor can the time of the autopsy be written on official documents. One must go to the site of the autopsy to estimate the actual time required before writing it down. In addition, the coroner and the clerks must be restrained and not allowed to leave the official's side for fear of illegal activities... ... .
When it comes to the specific inspection stage, the book is even more detailed and precise. The book records the human anatomy, corpse examination, scene inspection, identification of causes of death and injury, various phenomena of suicide or murder, various poisons and first aid, detoxification methods, methods of distinguishing drowning, hanging and false hanging, self-inflicted punishment and killing, death by fire and false death by fire, and the recorded methods of washing corpses, artificial respiration, sun-facing umbrella inspection, silver needle poison inspection, alum protein detoxification of arsenic poisoning, etc. are all very scientific.
This time in court, judging from the files of Xia County Magistrate Guan Pei's on-site inspection, there was no professionalism at all. It can be imagined that most of the counties and cities in the entire Qin Dynasty were in similar situations.
To implement the "presumption of innocence", the first thing to do is to improve the crime scene investigation technology. Otherwise, many cases will not be solved. The sharp drop in the crime clearance rate will inevitably lead to public resentment and the loss of credibility of the government.
Officials in the court will certainly use this as an excuse to strongly oppose it.
Qin Mu then picked up his pen and wrote down the methods he knew of extracting fingerprints. After that, he racked his brain and wrote down all the things he knew that should be paid attention to during the investigation.
In fact, he didn't know much in this area. Apart from fingerprints, he could only guess a person's height, weight, etc. based on footprints. He didn't know exactly how to guess. He only knew the results but not the reasons. However, this could be approximated through repeated tests.
At this time, Huang Lianshan came to the imperial study under the guidance of the young eunuch Hong Bao.
After Qin Mu asked everyone to leave, he said to Huang Lianshan, "Lianshan, immediately ask Ye Bushou to look for some of the most experienced coroners in crime scene investigations across the country, and then order them to report to the Nanjing Military Medical College. Also, if there are talents in crime scene investigations like Song Ci in the Southern Song Dynasty, whether they are officials or civilians, Ye Bushou must escort them to Nanjing as well."
"Yes, Your Majesty."
Qin Mu was determined to conduct a systematic crime scene investigation training for coroners in all counties and prefectures across the country. Each county should train at least two coroners with professional investigation skills.
The number of people who need to be trained will be tens of thousands, but Qin Mu gritted his teeth and decided to spend the money.
As the saying goes, human life is of paramount importance. All dynasties have actually attached great importance to murder cases. Qin Mu did not know that in other dynasties, death row prisoners in the Tang Dynasty had to be reviewed by the emperor himself before they could be executed.
What's more, what Qin Mu wants to do is not just to promote the "presumption of innocence". He wants to reform the local judicial system across the country and then improve the entire local administrative structure.
Compared with this grand goal, spending some money to train coroners and make them more professional forensic scientists is nothing.
Qin Mu then took out the fingerprint he had copied from the dagger handle, handed it to Huang Lianshan and said, "Take this and immediately send the most capable people to Linyao Village in Xia County. First, spread the news secretly that it has been found out that the murderer of Xia Niang was not Yang Guan, but someone else. The government has learned who the real murderer is and is rushing to arrest him.
After spreading the news, we will set up a dragnet. I believe the real murderer will lose his patience and make some unusual moves. Then we will catch all those who act unusually and compare their fingerprints one by one. Do you understand?"
Huang Lianshan bowed and said, "Your Majesty, rest assured. I know what to do. I will find the real culprit as soon as possible."
"Remember, try not to alert the local authorities. After you catch the real culprit, don't make it public. Take him back to Chang'an secretly for treatment. I have other plans."
“Yes!”
Qin Mu rubbed his temples and continued, "The Liu Shaoqing you found is not bad. If possible, you might as well find a few more. The bigger the momentum, the better. Also, you can't just build momentum in Chang'an City. You have to spread the news as soon as possible so that people from all over the country can talk about it."
Huang Lianshan knew that the emperor was planning a big plan and that this matter must not be messed up. He bowed again and replied carefully: "I will do it right away. I wonder if Your Majesty has any other instructions?"
"Just take care of these things for now, I'll tell you the rest later."
“Yes!”
After Huang Lianshan left, Qin Mu leaned back in the imperial chair and thought carefully about some of the detective methods used in later generations. He had seen some of Conan and the like, but he didn't know whether the methods of solving cases in them were really effective.
Well, let's recall the anime of the island country first. Well, what is certain is that with the stunning beauties like Li Xiangjun, when Conan recalls, he will definitely not think of Teacher Cang... ... ...
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.(To be continued..)
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