Not long after, Wang Shen's car entered Lin Su's residential compound. Wang Shen went directly to the property manager, showed his police ID, and had the manager lead him to the monitoring room.

Fortunately, Lin Su's residential complex was considered relatively upscale. Therefore, surveillance cameras were installed in the stairwells of each floor. Wang Shen calculated the timeline and requested to retrieve the footage from before Lin Su's murder.

Wang Shen and Liang Zichen's eyes were glued to the screen in front of them, and the playback speed was turned up to the fastest. The surveillance footage had only been playing for a short while when Wang Shen suddenly shouted, "Stop!"

Wang Shen and Liang Zichen had both seen Han Mo appear on the surveillance screen. Wang Shen checked the time displayed on the monitor; it was approximately nine o'clock in the morning.

Wang Shen smiled at the security guard watching the surveillance footage and said, "Please adjust the playback speed to normal."

The security guard nodded. Wang Shen calculated the time it took for Han Mo to enter and leave Lin Su's room. After a while, Han Mo finally came out of Lin Su's room. Wang Shen checked his watch; Han Mo had been in Lin Su's room for about half an hour.

After watching the surveillance footage, Wang Shen thanked the property manager and hurriedly left Lin Su's residential compound.

After Wang Shen and Liang Zichen got into the car, Liang Zichen glanced at Wang Shen and said, "Han Mo did indeed go to Lin Su's house this morning. And her purpose should be obvious: to put that red hard drive in Lin Su's room. But one thing is strange: why did she stay in Lin Su's room for so long?"

"Why? The reason is simple." Wang Shen shook his head and continued, "Han Mo should have checked Lin Su's room thoroughly to see if there were any flaws. But she ultimately overlooked those photos."

"Based on the clues we have so far, what role did Han Mo play in the whole case? Was Xu Xiaolin's death really because she just happened to run into Xiao Lin hiding in the house, and then she just happened to run into Lin Su, who had ulterior motives?" Liang Zichen began to have doubts about the cause of Xu Xiaolin's death.

“To call all of this a coincidence would be too much of a coincidence,” Wang Shen shook his head. “From the photos, we can see that Xu Xiaolin has met with Lin Su several times in private. As Han Mo’s sister, if Xu Xiaolin and Lin Su had any inappropriate relationship, I think Xu Xiaolin would definitely not want Han Mo to know. So, how could Xu Xiaolin possibly be in Han Mo’s house having dinner with Lin Su? This is just too contradictory.”

After speaking, Wang Shen paused, then fell silent in thought for a while. After a short while, he continued, "Furthermore, according to Xiao Lin and Lin Su's recorded descriptions, they didn't realize that the person in front of them that day was actually Xu Xiaolin. What does this mean?" He then turned his gaze to Liang Zichen.

Liang Zichen glanced at Wang Shen, then thought for a moment before replying, "This means even Xu Xiaolin herself is impersonating Han Mo. And this impersonation... could it be... could it be that Han Mo tacitly approved it?" Liang Zichen shook his head as he spoke. Because towards the end, even Liang Zichen himself couldn't explain the reason.

“I think so.” Unexpectedly, Wang Shen nodded in agreement after hearing Liang Zichen’s analysis.

Wang Shen glanced at Liang Zichen's puzzled expression and explained, "First of all, based on the photos and the clues we have so far, we know that Lin Su probably didn't know Xu Xiaolin existed back then. If that's the case, how did Xu Xiaolin manage to invite Lin Su to Han Mo's house?"

"The only way to contact Lin Su is through Han Mo's phone or social media," Liang Zichen replied after hearing Wang Shen's question.

“That’s right. But to use Han Mo’s things, you need Han Mo’s permission. So…” Wang Shen stopped there.

"So, Xu Xiaolin's approach to Lin Su was all with Han Mo's tacit approval. But why would Han Mo do that? Isn't Lin Su Han Mo's boyfriend? Two women serving one man? Good heavens, I don't quite understand." After listening to Wang Shen's analysis, Liang Zichen asked several questions in a row. The expression on Liang Zichen's face changed from confusion to astonishment.

"As for the reason, to be honest, I don't fully understand it either. However, if my guess is correct, then Xu Xiaolin's death was intentionally arranged by Han Mo." Wang Shen said, tapping his chin with his fist.

"What evidence do you have?" Liang Zichen asked.

Wang Shen nodded and said, "We don't have reliable evidence yet, only some reasonable guesses. Based on the clues we have, we know that Xiao Lin was able to sneak into Han Mo's house that day because Han Mo told him she was going to a reader meet-and-greet that evening and had even left her house key in her office. Moreover, the office door, which was always locked, was unlocked that day. With so many coincidences, either Han Mo is stupid or Xiao Lin is incredibly lucky."

Hearing Wang Shen's words, Liang Zichen understood what Wang Shen meant. "Captain Wang, are you saying that Han Mo is luring us into a trap?"

“That’s right.” Wang Shen nodded. “Han Mo did not go home that night, but she timed it so that Xu Xiaolin would go to her house. Before that, Han Mo must have told Xu Xiaolin about Xiao Lin’s inappropriate behavior. Moreover, as far as I know, Xu Xiaolin, although introverted, is very straightforward. Therefore, Han Mo anticipated that when Xu Xiaolin discovered Xiao Lin, it might cause uncontrollable consequences. Of course, the result was just as Han Mo predicted.”

"What about Lin Su? Was that also arranged by Han Mo? No, there's a problem. Why would Xu Xiaolin agree to Han Mo's request to impersonate Han Mo and get close to Lin Su?" Liang Zichen's mind was a bit of a mess, and he had many questions that needed to be answered.

“We can make some bold guesses about the reason. Han Mo actually discovered that Lin Su and Xiao Lin shared the same feelings, so she wanted to use Xu Xiaolin to test Lin Su's sincerity. As his younger sister, Xu Xiaolin probably readily accepted this request. However, during their time together, Xu Xiaolin discovered that she had fallen in love with Lin Su. Han Mo witnessed all of this change. Therefore, all the suspicion eventually brewed into jealousy, and ultimately turned into murderous intent.” Wang Shen explained his entire guess in one breath.

Liang Zichen gasped and exclaimed, "My God, this is like a novel!"

After speaking, Liang Zichen paused for a moment before continuing, "Captain Wang, do you mean that Han Mo decided to get rid of Xu Xiaolin because of love turned to hate?"

"If we're speculating maliciously, I think that's the case. But if that's the case, then although Han Mo isn't the direct killer of Xu Xiaolin, he's still inextricably linked to her death. So, it's time for us to confront Han Mo." After saying that, Wang Shen glanced at Liang Zichen.