When most people see someone in a police uniform, they assume it's a police officer; the vast majority wouldn't think to check credentials, especially in the village. Luo Xudong definitely counted on this, which is why he called two people to impersonate police officers to intimidate Qin Hongmei.
Beisitian asked how they caught Wang Guijin's weakness, and Luo Xudong just smiled. Upon further questioning, it became clear that Wang Guijin still didn't know that Qin Hongmei had confessed.
So Wang Guijin hasn't been investigated?
It turned out that the news Luo Xudong was waiting for was for when Wang Guijin went for field training, during which he couldn't be reached by phone. Qin Honglian hadn't been taken to the police station, only stalled by someone, temporarily unable to contact anyone.
