In the afternoon, Pei Rongbai and Qiao Songyu searched for the files for most of the afternoon.

It was just to find the case of Wen Yuan’s family, but the two of them searched for most of the afternoon but still couldn’t find the case of that year. The two of them used thirty years ago as the benchmark, pushing forward and backward by four years respectively, and they searched for a total of eight years.The dossier, but nothing, there is no such case.

Qiao Zeyu sat at the side, and saw that the two of them had been busy for half an afternoon, and they were almost lost in the pile of files. In the end, there was nothing to gain, so she couldn't help but said, "What are you two doing if you don't investigate the case?"

Ming Kong also asked: "Are you looking for an old case?"

After hearing this, Pei Rongxuan raised his eyebrows and said, "Is this old case related to our case?"

"I don't know if it's related, but it is indeed an old case. We heard a case in the teahouse today, which is also very strange." Qiao Zeyu said, and told the three of them what he heard in the teahouse just now..

After hearing this, Qiao Zeyu looked thoughtful and said with great interest, "This is interesting, and it's also a fox."

"But apart from the presence of foxes, there is no similarity or connection." Pei Rongxuan looked at his elder brother suspiciously, "Brother, why are you looking for the file of this case?"

Pei Rongbai shook his head, and said: "I just want to see what kind of case this case is..." He looked at the pile of papers in front of him, raised his eyebrows, and said, "But I couldn't find it, don't you think so?"Is it weird?"

"What's so strange about this." Pei Rongxuan said disapprovingly, "Maybe the tea customer invented this case?"

Pei Rongbai shook his head seriously: "I don't think it seems like a fabrication, and there's no need for him to fabricate such a story."

"What's so difficult about it?" Qiao Zeyu interjected, "Go find this person, and you'll know if you ask him?"

"Forget it, maybe there is really no connection." Pei Rongbai didn't want to go to waste everyone's time because of his own suspicion, so he didn't plan to go any further."By the way, you have studied the case for a day today, but do you have any clues?"

Qiao Songyu also looked at her second brother expectantly.

Qiao Zeyu smiled wryly and said: "Fu Sheng has already checked all the people who can be investigated... To be honest, this is also the first time for me to study a murder case, and I really don't have a clue, not to mention that this murderer is really difficult to deal with.Very little is left."

"We only found out that the murderer should be a man with martial arts..." Pei Rongxuan said, shrugging his shoulders with a helpless expression.

Pei Rongbai couldn't help giving him a blank look: "You are not talking nonsense, I know this without researching."

Qiao Songyu looked around and asked curiously, "Eh? Where's Fu Yin?"

"Oh, he went to investigate the old yamen servant's house together with two policemen," Qiao Zeyu said.

Because both the watchman and the shopkeeper of the pharmacy died on the road, there was nothing to investigate at the scene, so they could only go to the old yamen servant's residence to look again.

Everyone fell silent—there were so few clues that there was no way to investigate the case.

Pei Rongbai thought for a while and said: "Now let's sort out the unresolved questions in the case to see if there are any omissions or loopholes. Let's each talk about one."

Qiao Zeyu nodded and said, "First question, what is this man's motive for killing? Why did he kill these four people?"

Ming Kong continued: "How did he create the illusion that the fox demon killed people?"

Pei Rongxuan thought for a while, and then said: "Also, how did he choose the target? Randomly, or after selection?"

Pei Rongbai nodded in agreement, then looked at Qiao Songyu again, and asked with a gentle smile: "Is there a problem with Songer?"

"Yes! Don't underestimate me, okay?" Qiao Songyu spat, with an unconvinced look on her little face.

"Okay, then tell me."

"I..." Qiao Songyu looked at Pei Rongbai with sparkling eyes, and said excitedly, "Is there anything special about the place where the murderer chose to strike?"

Everyone didn't expect Qiao Songyu to ask this question, and they were all taken aback.However, Pei Rongbai quickly reacted, smiled and gave Qiao Songyu a look of approval, and said:

"Song Er is really smart. I really haven't considered this issue—the old government servant and Sun Teng are fine, but the murderer must have carefully selected the location of the watchman and the shopkeeper of the pharmacy!"

"That's it!" Qiao Songyu was very proud.

"Quickly, show me the map of Yang City!" Pei Rongbai said.

"It's just right, I saw it when I was flipping through the file." Pei Rongxuan said, got up and took out a hand-painted map of Yang City from the pile of books at the side, and handed the map to Pei Rongbai, "Here, this is this one."

Pei Rongbai took the map, spread it out on the desk, and then searched for four places where murders occurred, marked them out one by one, and connected them with a cinnabar pen.

Everyone came over to take a look, and they were all taken aback—the murder scene of the watchman and the pharmacy shopkeeper was actually about the same distance from the Yangcheng City government building, and these three points almost formed a triangle with almost two sides.

Qiao Zeyu, Pei Rongbai, and Ming Kong looked at each other and said in unison: "The murderer is here—"

"what?"

"Where is the murderer?"

Qiao Songyu and Pei Rongxuan were dumbfounded.

Qiao Zeyu then explained: "When the murderer chooses the location to attack, he will subconsciously consider the place close to his own home, because it is convenient to escape after committing the crime, so the murderer must live between these three points, that is, within this triangle."

"Isn't that very simple?" Qiao Songyu wondered, "Just search a few households in the triangle? His crime tools... eh? What did he use to kill people?"

Everyone was stunned again.

Pei Rongbai gave Qiao Songyu a thumbs up, and praised with a smile: "Song'er is amazing."

Although Qiao Songyu was a bit puzzled, she still raised her chin triumphantly: "Hmph, you guys are all in your thirties, you're not as good as me in my teens!"

Pei Rongbai just smiled dotingly at him, then lightly knocked on the table with his fingers, and asked everyone: "So here comes the question, what kind of weapon did the murderer use to kill?"

"I read in Li Cheng's autopsy record that it is suspected to be a long, soft object with a width of half a finger... What is this?" Pei Rongxuan looked puzzled.Soft long objects??

Everyone was full of question marks.