Captain Zhang quickly led Li Ruman and the other person to an office, where they found a woman in her forties sitting inside, accompanied by a man of the same age. They seemed to be a couple.

"Hello, I'm Captain Zhang from the Criminal Investigation Brigade. Could you please recount what you saw today?"

"Oh! Sure, sure. Tonight, my friend invited me out to sing. As I was leaving, I saw a Mercedes sports car driving away. Then I noticed the two people who died tonight getting up and walking towards a car in front. I suddenly remembered I had forgotten my phone, so I turned back to get it. As I turned, I accidentally saw a woman walking towards those two, but I didn't pay much attention and went back inside. When I came out again, the woman and those two men were gone. I didn't think much of it and went out to meet my friend for karaoke!"

"Just now, while I was singing with my friend, my husband came back from playing mahjong and told me there was a murder at our doorstep. Worried about me, he called to check if I was okay. That's when I remembered the woman I saw earlier and told my husband about it. He urged me to report it to the police!"