"The two kids from the Liu family aren't locals and aren't familiar with the Wang family Village. They can't have planned to kill the Wang family so carefully in such a short time. So, they must have had a local as an accomplice. And this accomplice, I'm guessing, is Wang Changfu."
"I've seen the dead's clothes, and I saw Wang Changfu yesterday. The two families were blood Brothers, but the gap between the rich and the poor could be seen from their clothing. And Wang Changfu had Wang Zhangshi's handkerchief with the Wang Zhangshi's name embroidered on it. Either Wang Changfu picked it up, or he had an affair with Wang Zhangshi."