As a local policeman, is it appropriate for you to take over the job of a criminal policeman?

"My mother sometimes discusses with others how much money to spend on gold. They are retired and have less time, so they will buy some," Niu Xiaowei said softly.

Ye Lin silently wrote it down, "What else?"

"Anything else?" Niu Xiaowei thought about it and suddenly his eyes lit up.

"By the way, police officer, the delivery guy and the onlookers heard it yesterday afternoon, too."

Niu Xiaowei repeated the words that Niu Jianmin had used to scold him, especially the part about him thinking about the gold.

Ye Lin glanced at him meaningfully and said calmly, "Is your company short of money?"

Niu Xiaowei smiled awkwardly, "It's just that I have no experience, so I lost some money. The old man was reluctant to pay the money, so he was unhappy and kept scolding me."

Ye Lin glanced at him coldly. This Niu Xiaowei was not honest at all when he spoke, so he still had to find out his bottom line.

He glanced at Li Suo, who understood instantly and nodded.

Seeing that they were silent, Niu Xiaowei became anxious again, "Comrade police, I think it was the delivery man. He heard me scold him and the delivery was knocked over. Then he heard that we had gold at home, so he came to steal it. When my parents found out, he killed people to take the treasure."

"Yes, wasn't there a person killed in the neighborhood next door a few days ago? Are they the same person?"

When Ye Lin heard this, it seemed like, how should I put it, the logic made some sense, but it was a bit far-fetched to say that it was done by the same person.

He nodded. "We will check on the delivery boy you mentioned. Don't worry, we won't let go of any clues. We will also check if there is any connection with the previous case. If you have any clues, you can contact us."

"Is that all you have to ask?" Niu Xiaowei seemed a little unsatisfied. "Then you better hurry up. I'm still waiting for the money."

"Don't worry, we will do our best." Ye Lin said, and then left the ward with Li Suo.

On the way back, Ye Lin said earnestly, "Officer Li, please send more personnel from your office to support us. We will mainly conduct field visits. These are two consecutive cases. In such a short time, we must thoroughly understand the circumstances of both cases."

Although Chief Li is older than Ye Lin, he can only listen obediently at this time. It's his own bad luck that two cases happened in a row.

"Don't worry, Captain Ye. I will cancel my vacation as soon as I get back and mobilize all the people." Chief Li promised, patting his chest.

"Well, I'll go back and compile the information first. You guys should find the takeaway boy that Niu Xiaowei mentioned first, and then find out what kind of person Niu Xiaowei is, and what kind of company he has. Your police station can easily understand the situation, and I need your support."

"Don't worry, Captain Ye. We may have come close to solving the case, but we are still doing a solid job in community work. We will definitely get to the bottom of the situation."

......

After Ye Lin separated from Li, he went straight back to the police station. He wanted to read the reports from the forensic and technical departments, believing that science was the basis for solving the case.

Sun Jinghua and Qi Shan also came back and brought the report with them.

"Captain Ye, the report is out."

Ye Lin didn't waste any time and started watching it on the projection.

The first of the two victims, Niu Jianmin, was stabbed three times in the chest. The force of each stab was uneven, some were deep and some were shallow. The fatal stab went straight into the heart. The murderer had enough force and should be an adult man.

The second victim, Shi Fuzhen, was only stabbed twice, both of which were deep, with the fatal wound being in her heart.

Another injured person, Niu Xiaowei, was hit hard on the back of the head with a blunt object. The technical department confirmed that it was a metal ornament on the utility cabinet, but no other fingerprints were extracted from it.

At the same time, his abdomen was stabbed by a fruit knife, but the wound was not deep. He just fainted due to excessive bleeding. If the murderer had been more cruel, I believe he would not have survived.

The murder weapon that killed the old couple was the fruit knife that was inserted into Niu Xiaowei's abdomen. The technical department also compared it and found that this fruit knife should have been used by the Niu family themselves. The murderer should have taken it from the table temporarily. The sheath of the fruit knife was still on the dining table.

The lock of the cabinet that locked the gold was smashed open directly using the same metal ornament that was used to hit Niu Xiaowei. The technical department found the lock fragments on it, and the things inside were turned into a mess, and the gold that Niu Xiaowei mentioned was not found either.

After reading the report, Ye Lin pondered for a while and said, "I went to Niu Xiaowei. He is no longer in danger of death. We also recorded his statement. We have two directions to go."

Sun Jinghua and Qi Shan took out their notebooks and started taking notes.

"One is that he mentioned that yesterday afternoon his father, Niu Jianmin, had a dispute with a food delivery man. The two sides had a quarrel, and Niu Jianmin mentioned the gold. Once the Li police find someone, we will go and investigate together."

"The other one is Niu Xiaowei, who claims to be running a company. I think he is losing money and may have enemies. We need to investigate the situation of his company."

"But we can only check these after Li Suo sends us the information."

The two nodded to show that they understood.

Ye Lin continued, "But today Niu Xiaowei said that the two cases might have been committed by the same person. I think the two cases do have some similarities. Both happened at night, and both happened in Lanyuan. Most importantly, in both cases, the victims opened their own doors. Why?"

"Why did the victim open the door? Tell me."

Sun Jinghua and Qi Shan looked at each other and began to scratch their heads.

"Well, Captain Ye, I think in modern society, knocking on a door is easy. Just shout, "Your takeaway has arrived," and the door will be opened." Qi Shan said tentatively.

"Yes, I will open the door no matter whether it's takeout or express delivery," Sun Jinghua added.

Ye Lin nodded, “Indeed, if these two cases are both such service personnel, then they can really knock on the door of the deceased.”

"But in the first case, the door was opened, but only the murderer was killed; in the second case, not only was the door opened and the murderer killed, but the gold was also taken. The murderer's purpose was completely different." With Ye Lin's encouragement, Sun Jinghua also began to analyze.

"So you think it was two different service personnel who committed the crime?"

"Could it be a copycat crime?" Sun Jinghua guessed.

"That's possible." Ye Lin said. In fact, he tended to believe that there were two different murderers. The two cases looked a bit similar, but they were actually very different.

For example, the murder weapon used in the first case was a dagger brought by the murderer, which must have been premeditated.

The second case was committed with a fruit knife from the victim's house, which must have been a spur-of-the-moment act.