Everyone fell silent after those words were spoken.

At this moment, You Chunsheng, who was usually not very talkative, suddenly spoke up: "The murder weapon this time was a kitchen knife. According to the investigation, it was a kitchen knife that the Fan family usually used. If the murderer really premeditated the murder, would he have gone without a weapon?"

Hearing this, everyone had doubts. Jiao Weimin said, "Could the murderer be Guo Dahe? It is said that he left without taking anything with him after the meal, and could only find the murder weapon randomly when he arrived at the Fan family's house."

If that's the case, then all their previous analysis was useless.

Su He carefully reviewed the case file and then asked another question, "What about Fan Ren? Can you prove that he stayed in the dormitory and didn't go home that day?"

Everyone was taken aback by these words.

"You suspect him?" Song Minghui frowned. "But his colleagues said that he went back to the dormitory with them after getting off work at midnight that night and never went out again."

Su He listened and thought carefully, "Everyone must be very tired when they get off work at midnight. They probably just lie down and fall asleep. Who would even notice if anyone went out?"

"But why would he kill them? Those were his parents, his wife, and his children. He had no reason to kill them."

Su He shook her head. "I don't know either. It's just a reasonable suspicion. It's not just him; others are also suspects."

For example, what a coincidence that neighbor did! He happened to get up at that exact time in the middle of the night and saw Guo Dahe running out. Could it be that he was the one who killed him? And then, after leaving, he happened to discover Guo Dahe's arrival and framed him.

The others listened thoughtfully.

"If you put it that way, then not just anyone could be a possibility?"

Luo Jun boldly guessed, "It could be an enemy of the Fan family, or it could be someone they don't know, like a thief or something."

Song Minghui shook his head. "It's unlikely to be a thief. The Fan family didn't lose anything valuable. Judging from the scene, the killing was just to vent their anger; it should be a revenge killing."

"Were there fingerprints on the murder weapon?" Su He asked again. Although fingerprints are not as easy to obtain as they are in later generations, they have long been used in criminal investigations.

Song Minghui shook his head. "No, the knife only had fingerprints left by the Fan family. The murderer cleaned it up after committing the crime, so there wasn't much blood left on it, which is why we couldn't find the murderer's fingerprints."

Su He frowned slightly upon hearing this; this was going to be difficult!

Just as everyone was pondering, Captain Chen returned and asked, "What are you talking about?"

The group exchanged glances, and finally Song Minghui spoke up, saying, "We feel there are still some doubts about the Fan family case, and we'd like to investigate further."

Captain Chen was not surprised by what he heard. He nodded and said, "I understand. I have already talked to the leaders and asked them to give you some more time. But you must find out the truth as soon as possible, otherwise the case will be closed as Guo Dahe is the murderer."

Su He and the others were pleasantly surprised to hear this.

However, Captain Chen soon added, "Because this case involves the life of a police officer, the higher-ups originally hoped to close the case as soon as possible, otherwise dragging it out would have a bad impact."

"I assured you from above that I believed there was something fishy about the case, which is why I bought you time. So please don't let me down. Even if it turns out that Guo Dahe is indeed the murderer, it's okay. At least it will make us feel better."

Upon hearing this, Su He and the others immediately replied, "We understand, Captain Chen."

"Okay, let's do it then."

In order not to waste the time that Captain Chen had worked so hard to gain, everyone divided the work and went out to investigate immediately.