"He wants to control me, just like he controlled Lin Fang in Room 1205, using her phone to mislead everyone and deliberately testing me with a nonexistent resident in Room 4 to confuse me."

I lowered my head in self-mockery. "It's a pity that because he knows me too well, it aroused my suspicion. If he hadn't planted the recording device and taunted me when he was about to succeed, I might have had a hard time guessing who he was."

Officer Fang looked at me with a complex expression.

"If you were a detective, I would gladly work with you."

His astonishing psychological resilience, if used for the right purposes, he believed would achieve great things.

I smiled and remained silent. He seemed to remember something, rummaged through his briefcase, and took out a sealed envelope containing a notebook.

"This is your younger sister-in-law's diary. She did have a deviant love, but she did not conspire with the killer, Cheng Moumin, in this matter."

Perhaps because the case had already been solved, and the killer had been sentenced to death, he revealed some previously hidden details to me.

"Cheng Moumin has serious psychological issues. When you escaped from your ex-husband's house and stayed at his place, Cheng Moumin targeted you, and since then, you became a part of his play.

Your neighbor died over four months ago. The manner of death was almost identical to that of your younger sister-in-law. The reason it went unnoticed for so long was because the tenant in that unit was a prostitute."

I understood what "prostitute" meant naturally, and it explained why different men were frequently seen entering and leaving that floor.

"The deceased had also solicited Cheng Moumin before, but she didn't expect to be killed."

With that, I roughly understood everything.