Detective: I can see the criminal record

Although Cen Lian couldn't tell what caused the scratch, he could tell that the scratch was neither old nor new, and looked like it had been made a few months ago.

"Aunt Qian, what scratched this place?" Out of caution, he chose to ask.

"I didn't notice it. It's not too high or too low. I don't tend to bump into it when I'm cleaning." Aunt Qian was also a little hesitant. "Maybe I accidentally scratched it when I was removing the handrail last time."

Wu Qiushan stared at the scratch for a while, then looked in the direction of the scratch and found that the scratch led to the living room.

But there were no special marks on the wall of the living room, so it was impossible to tell whether the scratch was an accident or not.

Uncle Yuan didn't make any other discoveries here, so Cen Lian was not in a hurry. This was only the first house he visited, and there might be more discoveries later.

Wu Qiushan didn't say to Cen Lian until they left Grandpa Yuan's house, "The scratches you just saw seem to be determining a location."

"Location?" Cen Lian didn't understand what Wu Qiushan meant.

"I'm not quite sure what it is yet. Let me visit a few more stores and have a look." Wu Qiushan already had a vague idea in his mind, but he needed some evidence to verify it.

Seeing the uncertainty on his face, Cen Lian did not ask any further questions. Instead, Yuan Chenxi seemed to be thinking about something.

"Is this the location of the network cable?" She looked towards Wuqiu Mountain.

Wu Qiushan nodded uncertainly, "Somewhat similar, but I can't be sure whether it's a coincidence or not."

What we have seen so far are isolated cases, and we need to visit other victims’ homes to verify this.

In the police car, Cen Lian felt a headache looking at the traffic jam.

"I usually take the subway when I come here for business. Driving is too congested," he said, looking at the navigation that showed it was only three kilometers but would take nearly half an hour to drive. "Is there any shortcut that I can take?"

"It used to be possible, but after the epidemic, many communities have closed some of their gates, and the shortcuts that used to go through the communities are now inaccessible." The local police officer who drove them seemed to have gotten used to it, and said with a smile while lighting a cigarette.

Seeing that there was absolutely no possibility of taking shortcuts, Cen Lian simply pulled Wu Qiushan and Yuan Chenxi to start studying the case.

"Did you notice just now? There is no computer in the old man's home," Cen Lian said of his observations. "There are few other electronic devices. Apart from the TV, there are only the mobile phones of the nanny and the old man. But the nanny was not defrauded."

Fewer electronic devices means that scammers have fewer tricks to use.

"Does this mean that the scammers choose their targets based on the phone model?" Yuan Chenxi glanced at her phone. "Mr. Yuan and Mrs. Qian don't use the same brand of phone."

"That's possible," Cen Lian was just thinking about this, "This means that the scammers are most likely the two people who installed the system."

Only by seeing it with your own eyes can you easily distinguish the different mobile phone models of Uncle Yuan and the nanny Aunt Qian.

Wuqiushan's biggest suspicion at the moment is also the two installers, but there is also no evidence at all.

"We don't even have a good reason to summon them now," Wu Qiushan frowned, "We need at least some clues, otherwise there's no point in trying to summon them."

Looking at their expressions, Cen Lian knew that Wu Qiushan and Yuan Chenxi were also suspecting the two installers, a man and a woman, which meant that he could safely assume that they were the ones who committed the crime.

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