The two major detectives in Chinese folk legends are Di Renjie and Bao Zheng. However, in real history, although Bao Zheng served as the prefect of Kaifeng, this position is more like the mayor of Beijing and is generally not in charge of case judgments. There is no record in history books that Bao Zheng is good at case judgments.

In contrast, since entering the officialdom, Di Renjie served as a judge, a judging master, and a Dali Temple Chief, all of which were responsible for case trials. Especially when he was the Dali Temple Chief, he handled a large number of backlog cases in the first year, involving more than 17,000 people, but none of them complained about the wrongdoer. It can be said that he is a real case-by-case judgment.

Of course, no matter whether Bao Zheng and Di Renjie are good at filing cases, they are both famous and strong and do not fear the powerful. This also makes them have great reputation in the court and the people, and become a famous minister in history. Even after their death, folk legends about them emerged one after another, especially Bao Zheng almost became a half-human and half-god, and even the cases in the underworld were under his control.

"Di Sicheng, please come in quickly, Wan'er, good tea!" Zhang Zong also welcomed Di Renjie into the house very enthusiastically. Bao Zheng must not have seen him, but seeing Di Renjie was also an unexpected surprise.

Di Renjie was also very polite. He entered the living room with Zhou Wu. Wan'er immediately brought tea. Zhang Zong said again: "I have heard of Di Sicheng's name for him for a long time. I heard that you have tried countless cases in a year, and many unsolved cases will be solved easily when encountering the Sicheng. I really admire you!"

"Young Master Zhang, you are polite. The reason why Di can solve so many cases is not because I have any great skills, but because the temple minister in his position was not in his position, which led to a large number of cases. The difficulty of trial is actually not very high. In comparison, the case of the Ghost Case that Mr. Zhang, you helped the Chang'an County Government solve the Chang'an County Government, is the real big case. Di still has a few questions now. I wonder if Mr. Zhang can solve the problem below?" Di Renjie said very politely to Zhang Zong.

"I dare not, don't you dare, Di Sicheng, just ask if you have something, I will definitely say everything!" Zhang Zong didn't dare to be arrogant in front of Di Renjie. After all, he is an amateur. The person in front of him is professional. His only strength is that he has obtained some investigation knowledge from various messy channels, and he still doesn't know if it is accurate?

Di Renjie was not polite, and immediately told the parts he couldn't understand about the Ghost Case. What he was most concerned about was why Zhang Zong could determine the hiding area of ​​the murderer from the location where the crime occurred. What is the principle?

It is normal for Di Renjie to not understand, because when he was in the Ghost Case, Zhang Zong used a lot of knowledge in criminal psychology. No matter how genius Di Renjie was, it was impossible to compare with a mature systematic discipline in later generations. Zhang Zong also hoped that his knowledge would help Di Renjie, so he explained it in detail, and Di Renjie's eyes became brighter the more he listened.

"There are no two completely identical people in this world, but as long as they are humans, they will have some psychological commonalities, and the same is true for criminals. For example, serial killers like the Ghost Case have their own fixed crime model, which is to take the heart after killing people, and they will also move in a certain area, and this area will be centered on the place they are most familiar with, generally the home of the prisoners. It is precisely because of this that I determined the area where they live and thus caught the criminals." Zhang Zong concluded finally.

"Excellent! Extremely exquisite! The ancients said that Chao heard the truth, and the death of the sky. Today, Di heard Mr. Zhang's words, which made me suddenly understand the difficult problems that I couldn't solve in my daily life. Even if I let Di die tomorrow, I will die without regrets!"

Di Renjie's words were also from the heart. He had accumulated a lot of experience in handling cases, but many of them were only aware of the truth, but not the reason. Zhang Zong's words fundamentally solved the doubts in his heart. If Zhang Zong had not been too young, he would have even thought of becoming a disciple.

"Di Sicheng has said that what I am talking about is just some metaphysical things. If you want to actually apply them to the case handling, you need someone like Di Sicheng to work hard!" Zhang Zong smiled again at this time.

"Mr. Zhang, I wonder if you have any research on the autopsy, for example, is there a way to judge the death time of a corpse?" Di Renjie suddenly asked again. If he had doubts about Zhang Zong's skills before, he was convinced now, and this time he really used a tone of asking for advice.

"There are many ways to judge the death time of a corpse. For example, in a short period of time, the most effective and direct way is to read the corpse spots!" Zhang Zong's detective novel is not in vain, and he also talks about this most basic problem.

"Corpse? What is that?" Di Renjie asked in confusion when he heard this new term.

At this time, Zhang Zong suddenly realized that in ancient times, there was no special coroner in the yamen, especially before the Song Dynasty, there were no special coroners in the yamen. Generally, some poor and humble people were asked to collect the corpses, and then report them to the yamen. It was not until the Song Dynasty that there were special coroners. Song Ci even wrote his case handling experience into "Xiaowen Lu", which became a must-read book for coroners in later generations.

It is worth mentioning that even in the Record of Rebellion, the term corpse spot was not mentioned, but the formation of corpse spots was recorded in detail. It was not until later generations that the proper term corpse spots were found.

"When a person is alive, the blood in his body moves, but when he dies, the blood cannot flow, so he begins to gather in the low places. For example, when a person dies, he faces his back, and then corpse spots will form on his back, buttocks, etc.." Zhang Zong explained patiently.

"So that's it. How can we use corpse spots to determine the time of death?" Di Renjie immediately understood when he heard this. He had seen many dead bodies and also noticed that some corpses would appear in the corpse spots in Zhang Zong's mouth. He just didn't know the cause and did not know the use of corpse spots.

"It's very simple. The formation of corpse spots also takes time. It usually takes one to two hours to appear. It is cloudy or matte at the beginning, and it reaches the most in six to seven hours. At this time, large corpse spots will appear. If someone flips the corpse, the corpse spots will disappear, and corpse spots will appear at the new bottom. However, if death exceeds one day or a half, the corpse spots will be fixed until they decay."
Chapter completed!