It was as postulated by the private investigators.
An expressionless Xia Ling asked, "What about the CCTV cameras?" Then, the footage opened by the police were from cameras with altered angles, placing the crime path in the perfect blind spot. Only one camera in the corner was missed, and that filmed Xia Ling coming out of the private room in an agitated state.
Xia Yu replied, "I adjusted all the camera angles so that I wouldn't be filmed, and created the impression that you had premeditated the crime. As for the camera that I missed? That was left on purpose… it was the camera that filmed everyone that came from the private room to the main hall. It would definitely capture you. I, on the other hand, left from the rubbish dump behind the corridor. There was no way that I would be captured."
"The police didn't suspect a thing?"