“No,” I shook my head. “I just want to confirm something.”

I then went to the second floor again and sprinkled some flour in every corner. After I finished, I went back to the first floor and asked Luo Weiwei to lock the door and prepare to leave.

“Where are we going next?” asked Huang Xiaotao.

“The police officers won’t be done yet,” I said. “I’m getting hungry now. Let’s eat! Didn’t you say you were going to treat us to the best roast duck?”

Luo Weiwei looked excited. It seemed that she was one of those ‘foodies’ who lived for food. 

“I know the way to the most famous roasted duck restaurant here, I’ll take you there!” she suggested. “You probably never tried their signature dish, it’s amazing, you’ll love it…”

“You’re not coming with us,” I interrupted her. “I need you to go back to the police station to do some tests for me. Check the nasal residue of the victims, as well as the stomach contents...