Previously, Zhao Yu had once asked Captain Sun to investigate the background of the pervert in Bai Ling High School. He wanted to see if the person was related to the Female Corpses Case.
Even thought Captain Sun was puzzled, he arranged for some of his men to investigate anyway. Their findings proved that the person was about the same age as Li Fei, but as his identity was cleared, he had been ruled out as a suspect.
So, when Zhao Yu brought up this same person again, Captain Sun was confused. He couldn't understand why Zhao Yu wouldn't just let the pervert off the hook!
At the moment, the pervert was actually still detained in the local police station, waiting for the next round of investigations. In order to buy time, Zhao Yu didn't let the police send him over, nor did he send anyone over himself. Instead, he sent Li Fei's photo to the local police station for the pervert to verify if he knew the person in the photo!