Aiya, the reference knowledge didn't mention who the real murderer was. He didn't know.
According to Zhang Yourui's case file, the murderer might not have a suitable weapon, so he used a blunt weapon to kill. He might not have left any footprints when he entered the courtyard, but he left footprints on the wall when he fled. The timing of the victim's wife's pregnancy was suspicious, and the child might not be the victim's. All these situations suggested that the murderer might have some kind of relationship with the victim's wife. Moreover, he was flustered when he committed the crime, and his lightness skills might not be very good.
Aiyaya, from the current case file, it was still not certain who the murderer was. However, there were many suspicious points. For example, there were no footprints in the courtyard, why did the murderer use a blunt weapon instead of a sword, and the timing of Madam Zhang's pregnancy was very suspicious. These suspicious points required further investigation to find the murderer.
In Zhang Yourui's case, there were many suspicious points about the modus operandi. First of all, there were footprints on the outer wall of the Zhang residence, but there were no footprints on the garden. Secondly, the victim had been killed by a blunt weapon in the back of the head. It was strange that the murderer did not use a sword or other sharp weapon in this kind of business, unless the murderer did not have a suitable weapon at the time. Finally, Madam Zhang Yang had been married to the deceased for nearly ten years and had no children. However, she was pregnant at this time. This was also very suspicious.
That was because the murderer might not have had a suitable weapon at that time.
The possible reason was that the murderer didn't have a suitable weapon at that time, so he used a blunt weapon.
In the beginning, Arrester Wang was angry because he was under the pressure of the case given by County Magistrate Zhu and was dissatisfied with his subordinates. During Xu Qi 'an's analysis of the case, his initial doubts and deep thoughts turned into his eyes that suddenly lit up as if he had caught something. His mentality gradually changed from pure dissatisfaction to serious consideration of Xu Qi' an's doubts.
The suspicious points in the case of Zhang Yourui, the night watchman of Dafeng, are as follows. First of all, there were outward footprints on the outer wall of the Zhang residence. It was inferred that the thief had climbed over the wall and escaped. However, there were no footprints that entered the courtyard in the dossier. There was a flowerbed under the wall, and there were no footprints that infiltrated the flowerbed. Secondly, the victim was killed by a blunt weapon in the back of the head. The murderer should have brought a weapon with him to do this. It would be more straightforward to kill with a sword, but why was it a blunt weapon? In the end, Madam Zhang married the deceased for nearly ten years without having a child, but she was pregnant at this time. The child might not be the deceased's.
In this case, Xu Qi 'an and the other constables were like smart people and ordinary people. Xu Qi 'an was seriously reading the dossier and actively thinking about the suspicious points of the case. As for the other constables, they were either hiding behind Arrester Wang or adding random explanations when Arrester Wang was stumped by Xu Qi' an. They were not convinced by Xu Qi 'an's doubts, but Xu Qi' an was helping everyone solve the problems for Old Wang. His train of thought was clearly clearer than the other constables, and he was more able to discover the key problems in the case.
The deceased was called Zhang Yourui. He was fifty-one years old and was a rich dog. He had more than ten hectares of fertile farmland in the suburbs of Changle County. There were three shops in the capital that sold silk, rouge, and groceries. His first wife died early and married a good family twenty years younger than him. He had an only son left behind by his deceased wife and no other children.
The constables didn't investigate this, so they didn't know.