309, who is the murderer?

Inside the private room, Li Xiaoyi was the only one. Music was playing, and there were drinks on the table. He was sitting on the couch, leaning back with his eyes closed as if he was sleeping. He even had a jacket draped over him, his own.

Li Wei asked softly, "Qinghuan, should we go in?"

Song Qinghuan frowned, "No need, we don't need to go in for now. It looks like he's waiting for someone, perhaps that person is the one we're looking for. All the private rooms on this side are taken, how about the rooms behind you? Maybe we could sit next door and come out to check again when someone arrives."

Li Wei nodded and took a step forward.

But after two rooms, she quickly retreated, "They're all occupied."